Multiple protocol wireless communication baseband transceiver

• US 20070002878A1
• Filed: 05/15/2006
• Published: 01/04/2007
• Est. Priority Date: 06/29/2005
• Status: Active Grant

• Current Assignee: Bell Northern Research, LLC (Hilco Inc. (d/b/a Hilco Global))
• Original Assignee: Broadcom Corporation (Broadcom, Inc.)
• Inventors: Hammerschmidt, Joachim, Moorti, Rajendra, Su, Ling, Trachewsky, Jason
• Granted Patent: US 7,813,374 B2
• Time in Patent Office: Days
• US Class Current: 370/401
• CPC Class Codes: H04L 1/0001 Systems modifying transmission characteristics according to link quality, e.g. power backoff adaptive data allocation for multicarrier modulation H04L5/0044; controlling transmission power for radio systems H04W52/04
• CPC Class Codes: H04L 1/0041 Arrangements at the transmitter end
• CPC Class Codes: H04L 1/0054 Maximum-likelihood or sequential decoding, e.g. Viterbi, Fano, ZJ algorithms
• CPC Class Codes: H04L 1/0068 by puncturing
• CPC Class Codes: H04L 1/0071 Use of interleaving interleaving per se H03M13/27
• CPC Class Codes: H04L 1/0083 Formatting with frames or packets; Protocol or part of protocol for error control

Abstract

A multi-protocol wireless communication baseband transceiver includes a baseband transmit processing module and a baseband receive processing module. The baseband transmit processing module includes an encoding module, an interleaving module, a plurality of symbol mapping modules, a plurality of domain conversion modules, a plurality of cyclic prefix modules, a plurality of compensation modules, and a control module that is operably coupled to produce preamble set up information and payload set up information based on a mode of a plurality of protocol modes. The baseband receive processing module includes a plurality of receive compensation modules, a plurality of cyclic prefix removal modules, a plurality of receive domain conversion modules, an equalizing module, a plurality of demapping modules, a deinterleaving module, a decoding module, and a receive control module that is operably coupled to determine the mode from the plurality of protocol modes and the compensation control signals based on the at least one compensated stream of symbols.

Claims

1. A multiple protocol wireless communication baseband transmit processing module capable of multiple input multiple output (MIMO) comprises:

control module operably coupled to produce preamble set up information and payload set up information based on a mode of a plurality of protocol modes;

encoding module operably coupled to;

encode preamble data in accordance with the preamble set up information to produce encoded preamble data; and

encode payload data in accordance with the payload set up information to produce encoded payload data;

interleaving module operably coupled to;

interleave the encoded preamble data in accordance with the preamble set up information to produce at least one stream of interleaved encoded preamble data; and

interleave the encoded payload data in accordance with the payload set up information to produce at least one stream of interleaved encoded payload data;

a plurality of symbol mapping modules operably coupled to;

map, in accordance with the preamble set up information, the at least one stream of interleaved encoded preamble data to at least one stream of frequency domain preamble symbols; and

map, in accordance with the payload set up information, the at least one stream of interleaved encoded payload data to at least one stream of frequency domain payload symbols;

a plurality of domain conversion modules operably coupled to;

convert, in accordance with the preamble set up information, the at least one stream of frequency domain preamble symbols into at least one stream of time domain preamble symbols; and

convert, in accordance with the payload set up information, the at least one stream of frequency domain payload symbols into at least one stream of time domain payload symbols;

a plurality of cyclic prefix modules operably coupled to;

add, in accordance with the preamble set up information, a cyclic prefix to the at least one stream of time domain preamble symbols to produce at least one stream of preamble symbols; and

add a cyclic prefix to the at least one stream of time domain payload symbols to produce at least one stream of payload symbols; and

a plurality of compensation modules operably coupled to;

compensate the at least one stream of preamble symbols to produce at least one stream of compensated preamble symbols; and

compensate the at least one stream of payload symbols to produce at least one stream of compensated payload symbols.

2. The multiple protocol wireless communication baseband transmit processing module of claim 1, wherein the control module comprises at least one of:

a medium access control (MAC) layer to physical (PHY) layer interface operably coupled to provide the payload data to the encoding module based on the mode;

a frame control module operably coupled to produce the preamble set up information and to produce the payload set up information based on the mode;

signal field generator operably coupled to provide a signal field corresponding to the mode, wherein the signal field is provided to the encoding module as the preamble data;

a long training sequence module operably coupled to provide a long training sequence corresponding to the mode, wherein the long training sequence is provided to the plurality symbol mapping module as part of the preamble set up information, such that the at least one stream of frequency domain preamble symbols includes a mapped representation of the long training sequence; and

a short training sequence module operably coupled to provide a short training sequence corresponding to the mode, wherein the short training sequence is provided to the plurality of cyclic prefix modules as part of the preamble set up information, wherein the at least one stream of preamble symbols includes a representation of the short training sequence.

3. The multiple protocol wireless communication baseband transmit processing module of claim 1, wherein the encoding module comprises:

a scrambler module operably coupled to scrambler the payload data in accordance with the payload set up information to produce scrambled data;

an encoder operably coupled to encode the scrambled data or a signal field of the preamble data in accordance with the payload set up information to produce encoded data; and

a puncture module operably coupled to puncture the encoded data in accordance with the payload set up information to produce the encoded payload data and the encoded preamble data.

4. The multiple protocol wireless communication baseband transmit processing module of claim 3, wherein the encoding module comprises:

the encoder including;

a serial to parallel converter operably coupled to convert a serial stream of the scrambled data into a plurality of streams of scrambled data; and

a plurality of coding units operably coupled to encode the plurality of streams of scrambler data to produce a plurality of streams of encoded data; and

the puncture module including;

a plurality of puncture units to puncture the plurality of streams of encoded data to produce a plurality of streams of punctured data; and

a parallel to serial module operably coupled to convert the plurality of streams of punctured data into the encoded payload data.

5. The multiple protocol wireless communication baseband transmit processing module of claim 4, wherein the encoding module comprises:

a legacy scrambler operably coupled to scrambler the payload data when the mode is a first mode of the plurality of the protocol modes to produce legacy scrambled data;

a legacy encoder operably coupled to encode the legacy scrambled data when the mode is the first mode to produce legacy encoded data; and

a legacy puncture module operably coupled to puncture the legacy encoded data when the mode is the first mode to produce legacy encoded payload data as the encoded payload data.

6. The multiple protocol wireless communication baseband transmit processing module of claim 1, wherein the control module functions to:

generate a first preamble set up information and a first payload set up information when the mode is an IEEE 802.11b mode of the plurality of protocol modes, wherein the first preamble set up information includes at least one of a synchronization field, a start of frame delimiter, a signal field, a service field, and a length field in accordance with the IEEE 802.11b, and wherein the first payload set up information includes transmit power;

generate a second preamble set up information and a second payload set up information when the mode is an IEEE 802.11a mode of the plurality of protocol modes, wherein the second preamble set up information includes at least one of a short training sequence, a long training sequence, a signal field, a service field, and a frame length field in accordance with the IEEE 802.11a and wherein the second payload set up information includes transmit power, encoding scheme, puncture rate, data rate, modulation scheme, and path selection;

generate a third preamble set up information and a third payload set up information when the mode is an IEEE 802.11g mode of the plurality of protocol modes, wherein the third preamble set up information includes at least one of a short training sequence, a long training sequence, a signal field, a service field, and a frame length field in accordance with the IEEE 802.11g and wherein the second payload set up information includes transmit power, encoding scheme, puncture rate, data rate, modulation scheme, and path selection; and

generate a fourth preamble set up information and a fourth payload set up information when the mode is a MIMO mode of the plurality of protocol modes, wherein the fourth preamble set up information includes at least one of a short training sequence, a long training sequence, a signal field, a service field, and a frame length field in accordance with the MIMO mode and wherein the second payload set up information includes transmit power, encoding scheme, puncture rate, data rate, modulation scheme, number of transmit paths, and path selection.

7. The multiple protocol wireless communication baseband transmit processing module of claim 1, wherein each of the plurality of compensation modules comprises:

a baseband multiplier operably coupled to;

multiple a scaling factor with a corresponding one of the at least one stream of preamble symbols to produce a scaled stream of preamble symbols; and

multiple the scaling factor with a corresponding one of the at least one stream of payload symbols to produce a scaled stream of payload symbols; and

an in-phase and quadrature module operably coupled to;

compensate for in-phase and quadrature imbalances of the scaled stream of preamble symbols to produce a corresponding one of the at least one stream of compensated preamble symbols; and

compensate for the in-phase and quadrature imbalances of the scaled stream of payload symbols to produce a corresponding one of the at least one stream of compensated payload symbols.

8. A multiple protocol wireless communication baseband receive processing module capable of multiple input multiple output (MIMO) comprises:

a plurality of compensation module operably coupled to compensate at least one received stream of symbols in accordance with compensation control signals to produce at least one stream of compensated symbols;

a plurality of cyclic prefix removal modules operably coupled to remove, in accordance with a mode of a plurality of protocol modes, a cyclic prefix from fields of the at least one stream of compensated symbols to produce at least one stream of cyclic prefix removed symbols;

a plurality of domain conversion modules operably coupled to convert, in accordance with the mode of a plurality of protocol modes, the at least one stream of cyclic prefix removed symbols from a time domain to a frequency domain to produce at least one stream of frequency domain symbols;

an equalizing module operably coupled to equalize the at least one stream of frequency domain symbols based on a channel estimation to produce at least one stream of equalized frequency domain symbols;

a plurality of demapping modules operably coupled to demap the at least one stream of equalized frequency domain symbols in accordance with the mode of the plurality of protocol modes to produce at least one stream of interleaved data;

a deinterleaving module operably coupled to deinterleave, in accordance with the mode of the plurality of protocol modes, the at least one stream of interleaved data to produce encoded data;

a decoding module operably coupled to decode, in accordance with the mode of the plurality of protocol modes, the encoded data to produce data; and

a control module operably coupled to determine the mode from the plurality of protocol modes and the compensation control signals based on the at least one compensated stream of symbols.

9. The multiple protocol wireless communication baseband receive processing module of claim 8, wherein each of the plurality of compensation modules comprises at least one of:

DC offset module operably coupled to compensate for DC offset of a corresponding one of the at least one of the received stream of symbols;

an in-phase (I) and quadrature (Q) compensation module operably coupled to compensate for in-phase and quadrature imbalance of a corresponding one of the at least one of the received stream of symbols in accordance with an IQ imbalance estimation of the compensation control signals to produce at least one stream of IQ balanced symbols;

frequency correction module operably coupled to compensate for a sampling frequency offset of the at least one stream of IQ balanced symbols in accordance with a sampling frequency offset value of the compensation control signals to produce at least one stream of frequency compensated symbols; and

a filtering module operably coupled to filter the at least one stream of frequency compensated symbols to produce the at least one stream of compensated symbols.

10. The multiple protocol wireless communication baseband receive processing module of claim 8, wherein each of the plurality of domain conversion modules comprises:

a time domain correction module operably coupled to compensate a corresponding one of the at least one stream of cyclic prefix removed symbols for a time domain offset to produce a stream of time domain offset compensated symbols; and

a fast Fourier transform (FFT) module operably coupled to convert the stream of time domain offset compensated symbols into a corresponding one of the at least one stream of frequency domain symbols.

11. The multiple protocol wireless communication baseband receive processing module of claim 8, wherein each of the plurality of demapping modules comprises:

a common phase error and sampling frequency offset compensation module operably coupled to compensate a corresponding one of the at least one stream of equalized frequency domain symbols for at least one of common phase error and sampling frequency offset to produce a stream of phase and frequency compensated symbols; and

a symbol demapper operably coupled to demap the stream of phase and frequency compensated symbols to produce a corresponding one of the at least one of interleaved data.

12. The multiple protocol wireless communication baseband receive processing module of claim 8, wherein the control module comprises:

a plurality of in-phase (I) and quadrature (Q) imbalance estimation modules operably coupled to determine IQ imbalance in each of the least one received stream of symbols to produce an IQ imbalance estimation therefrom;

packet protocol control module operably coupled to determine the mode from the plurality of protocol modes based on a preamble format of the at least one stream of compensated symbols; and

frequency and phase offset determining module operably coupled to determine a frequency offset and a phase offset based on at lest one of the least one stream of compensated symbols, the at least one stream of interleaved symbols, and the at least one stream of equalized frequency domain symbols.

13. A multi-protocol wireless communication baseband transceiver comprises:

a baseband transmit processing module including;

control module operably coupled to produce preamble set up information and payload set up information based on a mode of a plurality of protocol modes;

encoding module operably coupled to;

encode preamble data in accordance with the preamble set up information to produce encoded preamble data; and

encode payload data in accordance with the payload set up information to produce encoded payload data;

interleaving module operably coupled to;

interleave the encoded preamble data in accordance with the preamble set up information to produce at least one stream of interleaved encoded preamble data; and

interleave the encoded payload data in accordance with the payload set up information to produce at least one stream of interleaved encoded payload data;

a plurality of symbol mapping modules operably coupled to;

map, in accordance with the preamble set up information, the at least one stream of interleaved encoded preamble data to at least one stream of frequency domain preamble symbols; and

map, in accordance with the payload set up information, the at least one stream of interleaved encoded payload data to at least one stream of frequency domain payload symbols;

a plurality of domain conversion modules operably coupled to;

convert, in accordance with the preamble set up information, the at least one stream of frequency domain preamble symbols into at least one stream of time domain preamble symbols; and

convert, in accordance with the payload set up information, the at least one stream of frequency domain payload symbols into at least one stream of time domain payload symbols;

a plurality of cyclic prefix modules operably coupled to;

add, in accordance with the preamble set up information, a cyclic prefix to the at least one stream of time domain preamble symbols to produce at least one stream of preamble symbols; and

add a cyclic prefix to the at least one stream of time domain payload symbols to produce at least one stream of payload symbols; and

a plurality of compensation modules operably coupled to;

compensate the at least one stream of preamble symbols to produce at least one stream of compensated preamble symbols; and

compensate the at least one stream of payload symbols to produce at least one stream of compensated payload symbols; and

a baseband receive processing module including;

a plurality of receive compensation module operably coupled to compensate at least one received stream of symbols in accordance with compensation control signals to produce at least one stream of compensated symbols;

a plurality of cyclic prefix removal modules operably coupled to remove, in accordance with a mode of a plurality of protocol modes, a cyclic prefix from fields of the at least one stream of compensated symbols to produce at least one stream of cyclic prefix removed symbols;

a plurality of receive domain conversion modules operably coupled to convert, in accordance with the mode of a plurality of protocol modes, the at least one stream of cyclic prefix removed symbols from a time domain to a frequency domain to produce at least one stream of frequency domain symbols;

an equalizing module operably coupled to equalize the at least one stream of frequency domain symbols based on a channel estimation to produce at least one stream of equalized frequency domain symbols;

a plurality of demapping modules operably coupled to demap the at least one stream of equalized frequency domain symbols in accordance with the mode of the plurality of protocol modes to produce at least one stream of interleaved data;

a deinterleaving module operably coupled to deinterleave, in accordance with the mode of the plurality of protocol modes, the at least one stream of interleaved data to produce encoded data;

a decoding module operably coupled to decode, in accordance with the mode of the plurality of protocol modes, the encoded data to produce data; and

a receive control module operably coupled to determine the mode from the plurality of protocol modes and the compensation control signals based on the at least one compensated stream of symbols.

14. The multi-protocol wireless communication baseband transceiver of claim 13, wherein the control module comprises at least one of:

a medium access control (MAC) layer to physical (PHY) layer interface operably coupled to provide the payload data to the encoding module based on the mode;

a frame control module operably coupled to produce the preamble set up information and to produce the payload set up information based on the mode based on the mode;

signal field generator operably coupled to provide a signal field corresponding to the mode, wherein the signal field is provided to the encoding module as the preamble data;

a long training sequence module operably coupled to provide a long training sequence corresponding to the mode, wherein the long training sequence is provided to the plurality symbol mapping module as part of the preamble set up information, such that the at least one stream of frequency domain preamble symbols includes a mapped representation of the long training sequence; and

a short training sequence module operably coupled to provide a short training sequence corresponding to the mode, wherein the short training sequence is provided to the plurality of cyclic prefix modules as part of the preamble set up information, wherein the at least one stream of preamble symbols includes a representation of the short training sequence.

15. The multi-protocol wireless communication baseband transceiver of claim 13, wherein the control module functions to:

generate a first preamble set up information and a first payload set up information when the mode is an IEEE 802.11b mode of the plurality of protocol modes, wherein the first preamble set up information includes at least one of a synchronization field, a start of frame delimiter, a signal field, a service field, and a length field in accordance with the IEEE 802.11b, and wherein the first payload set up information includes transmit power;

generate a second preamble set up information and a second payload set up information when the mode is an IEEE 802.11a mode of the plurality of protocol modes, wherein the second preamble set up information includes at least one of a short training sequence, a long training sequence, a signal field, a service field, and a frame length field in accordance with the IEEE 802.11a and wherein the second payload set up information includes transmit power and path selection;

generate a third preamble set up information and a third payload set up information when the mode is an IEEE 802.11g mode of the plurality of protocol modes, wherein the third preamble set up information includes at least one of a short training sequence, a long training sequence, a signal field, a service field, and a frame length field in accordance with the IEEE 802.11g and wherein the second payload set up information includes transmit power and path selection; and

generate a fourth preamble set up information and a fourth payload set up information when the mode is a MIMO mode of the plurality of protocol modes, wherein the fourth preamble set up information includes at least one of a short training sequence, a long training sequence, a signal field, a service field, and a frame length field in accordance with the MIMO mode and wherein the second payload set up information includes transmit power, number of transmit paths, and path selection.

16. The multi-protocol wireless communication baseband transceiver of claim 13, wherein each of the plurality of compensation modules comprises:

a baseband multiplier operably coupled to;

multiple a scaling factor with a corresponding one of the at least one stream of preamble symbols to produce a scaled stream of preamble symbols; and

multiple the scaling factor with a corresponding one of the at least one stream of payload symbols to produce a scaled stream of payload symbols; and

an in-phase and quadrature module operably coupled to;

compensate for in-phase and quadrature imbalances of the scaled stream of preamble symbols to produce a corresponding one of the at least one stream of compensated preamble symbols; and

compensate for the in-phase and quadrature imbalances of the scaled stream of payload symbols to produce a corresponding one of the at least one stream of compensated payload symbols.

17. The multi-protocol wireless communication baseband transceiver of claim 13, wherein the encoding module comprises:

a scrambler module operably coupled to scrambler the payload data in accordance with the payload set up information to produce scrambled data;

an encoder operably coupled to encode the scrambled data or a signal field of the preamble data in accordance with the payload set up information to produce encoded data, wherein the encoder includes;

a serial to parallel converter operably coupled to convert a serial stream of the scrambled data into a plurality of streams of scrambled data; and

a plurality of coding units operably coupled to encode the plurality of streams of scrambler data to produce a plurality of streams of encoded data;

a puncture module operably coupled to puncture the encoded data in accordance with the payload set up information to produce the encoded payload data and the encoded preamble data, wherein the puncture module includes;

a plurality of puncture units to puncture the plurality of streams of encoded data and to produce a plurality of streams of punctured data; and

a parallel to serial module operably coupled to convert the plurality of streams of punctured data into the encoded payload data;

a legacy scrambler operably coupled to scrambler the payload data when the mode is a first mode of the plurality of the protocol modes to produce legacy scrambled data;

a legacy encoder operably coupled to encode the legacy scrambled data when the mode is the first mode to produce legacy encoded data; and

a legacy puncture module operably coupled to puncture the legacy encoded data when the mode is the first mode to produce legacy encoded payload data as the encoded payload data.

18. The multi-protocol wireless communication baseband transceiver of claim 13, wherein each of the plurality of receive compensation modules comprises at least one of:

DC offset module operably coupled to compensate for DC offset of a corresponding one of the at least one of the received stream of symbols;

an in-phase (I) and quadrature (Q) compensation module operably coupled to compensate for in-phase and quadrature imbalance of a corresponding one of the at least one of the received stream of symbols in accordance with an IQ imbalance estimation of the compensation control signals to produce at least one stream of IQ balanced symbols;

frequency correction module operably coupled to compensate for a sampling frequency offset of the at least one stream of IQ balanced symbols in accordance with a sampling frequency offset value of the compensation control signals to produce at least one stream of frequency compensated symbols; and

a filtering module operably coupled to filter the at least one stream of frequency compensated symbols to produce the at least one stream of compensated symbols.

19. The multi-protocol wireless communication baseband transceiver of claim 13, wherein each of the plurality of receive domain conversion modules comprises:

a time domain correction module operably coupled to compensate a corresponding one of the at least one stream of cyclic prefix removed symbols for a time domain offset to produce a stream of time domain offset compensated symbols; and

a fast Fourier transform (FFT) module operably coupled to convert the stream of time domain offset compensated symbols into a corresponding one of the at least one stream of frequency domain symbols.

20. The multi-protocol wireless communication baseband transceiver of claim 13, wherein the receive control module comprises:

a plurality of in-phase (I) and quadrature (Q) imbalance estimation modules operably coupled to determine IQ imbalance in each of the least one received stream of symbols to produce an IQ imbalance estimation therefrom;

packet protocol control module operably coupled to determine the mode from the plurality of protocol modes based on a preamble format of the at least one stream of compensated symbols; and

frequency and phase offset determining module operably coupled to determine a frequency offset and a phase offset based on at lest one of the least one stream of compensated symbols, the at least one stream of interleaved symbols, and the at least one stream of equalized frequency domain symbols.