Multi-bank OFDM high data rate extensions

• US 20050237923A1
• Filed: 04/26/2005
• Published: 10/27/2005
• Est. Priority Date: 04/26/2004
• Status: Abandoned Application

• Current Assignee: Texas Instruments, Inc.
• Original Assignee: Texas Instruments, Inc.
• Inventors: Batra, Anuj, Balakrishnan, Jaiganesh, Dabak, Anand
• Application Number:
  US11/115,816
• Publication Number:
  US 20050237923A1
• Time in Patent Office: Days
• US Class Current: 370/208
• CPC Class Codes: H04B 7/066 Combined feedback for a number of channels, e.g. over several subcarriers like in orthogonal frequency division multiplexing [OFDM]
• CPC Class Codes: H04L 27/2602 Signal structure

Abstract

A transmitter 200 is provided. The transmitter 200 comprises a mapper 207 operable to map a bit stream into a plurality of tones to promote high data rate multi-band orthogonal frequency division multiplex communication, wherein the tones can take on sixteen or more different values 300. In another embodiment a communications system 1360 is provided that includes a transceiver 1362 that has two or more antennas 1394 and 1396. The transceiver 1362 transmits a first multi-band orthogonal frequency division multiplex signal in multiple input/multiple output mode and receives a second multi-band orthogonal frequency division multiplex signal in multiple input/multiple output mode. In another embodiment, a transceiver 200, 202 transmits a first multi-band orthogonal frequency division multiplex symbol concurrently on a plurality of sub-bands and receives a second multi-band orthogonal frequency division multiplex symbol concurrently on a plurality of sub-bands.

Claims

1. A transmitter, comprising:

a mapper operable to map a bit stream into a plurality of tones to promote high data rate multi-band orthogonal frequency division multiplex communication, wherein the tones contain a data and the data can take on sixteen or more different values.

2. The transmitter of claim 1, wherein the data on the tones are quadrature amplitude modulation symbols.

3. The transmitter of claim 1, further including a receiver operable to receive a multi-band orthogonal frequency division multiplex communication.

4. The transmitter of claim 1, wherein the data comprises a plurality of information bits, the information bits spread across one of a plurality sub-bands and a plurality of symbols, and the information bits are loaded into different portions of the data on the tones.

5. The transmitter of claim 1, wherein the data comprises a plurality of information bits and further including:

an encoder operable to introduce redundancy into the information bits; and

an interleaver operable to interleave the information bits and to provide the information bits to the mapper, the information bits spread across one of a plurality of sub-bands and symbols and loaded into different portions of the data on the tones.

6. A communication system, comprising:

a transceiver having two or more antennas, the transceiver operable to transmit a first multi-band orthogonal frequency division multiplex signal in multiple input/multiple output mode and to receive a second multi-band orthogonal frequency division multiplex signal in multiple input/multiple output mode.

7. The communication system of claim 6, wherein the transceiver includes a mapper operable to map a bit stream into a plurality of tones, wherein the tones contain a data that can take on sixteen or more different values and the first multi-band orthogonal frequency division multiplex signal in multiple input/multiple output mode is based at least in part on the tones.

8. The communication system of claim 7, wherein the transceiver is further operable to transmit the first multi-band orthogonal frequency division multiplex signal in multiple input/multiple output mode concurrently on a plurality of sub-bands and to receive the second multi-band orthogonal frequency division multiplex signal in multiple input/multiple output mode concurrently on a plurality of sub-bands.

9. The communication system of claim 6, wherein the transceiver is further operable to transmit the first multi-band orthogonal frequency division multiplex signal in multiple input/multiple output mode concurrently on a plurality of sub-bands and to receive the second multi-band orthogonal frequency division multiplex signal in multiple input/multiple output mode concurrently on a plurality of sub-bands.

10. The communication system of claim 6, wherein the transceiver is operable to jointly demodulate the second multi-band orthogonal frequency division multiplex signal in multiple input/multiple output mode.

11. The communication system of claim 6, wherein the transceiver includes a transmitter having a first inverse fast Fourier transformer, a second inverse fast Fourier transformer, and two time domain output processing components and a receiver having a first fast Fourier transformer, a second fast Fourier transformer, and two time domain input processing components.

12. The communication system of claim 11, wherein the transceiver further includes an encoder and interleaver component operable to provide a first precursor signal to the first inverse fast Fourier transformer and a second precursor signal to the second inverse fast Fourier transformer, where the first multi-band orthogonal frequency division multiplex signal is based on the first and second precursor signals.

13. The communication system of claim 11, wherein the receiver further includes a decoder and deinterleaver component operable to process a first derived signal received from the first fast Fourier transformer and a second derived signal received from the second fast Fourier transformer, where the first derived signal and the second derived signal are based on the second multi-band orthogonal frequency division multiplex signal.

14. The communication system of claim 6, wherein transceiver transmits the first signal in spatial diversity mode.

15. The communication system of claim 6, wherein the transceiver transmits the first signal in transmit diversity mode.

16. The communication system of claim 6, wherein the transceiver receives the second signal in transmit diversity mode and demodulates the second signal using a demodulation method selected from the group consisting of a maximum ratio combining demodulation technique and an equal gain combining demodulation technique.

24. The communication system of claim 16, wherein the transceiver includes a mapper operable to map a bit stream into a plurality of tones, wherein the tones contain a data that can take on sixteen or more different values and the first symbol is based at least in part on the tones.

17. A communication system, comprising:

a transceiver operable to transmit a first multi-band orthogonal frequency division multiplex symbol concurrently on a plurality of sub-bands and to receive a second multi-band orthogonal frequency division multiplex symbol concurrently on a plurality of sub-bands.

18. The communication system of claim 17, wherein the transceiver is operable to transmit the first symbol concurrently on three sub-bands and to receive the second symbol concurrently on three sub-bands.

19. The communication system of claim 17, wherein at least one of the sub-bands is non-contiguous with at least some of the remaining sub-bands.

20. The communication system of claim 17, wherein the transceiver is further operable to negotiate to obtain the right to transmit on the plurality of sub-bands

21. The communication system of claim 17, wherein the plurality of sub-bands on which the transceiver transmits is different from the plurality of sub-bands on which the transceiver receives.

22. The communication system of claim 17, wherein the number of sub-bands on which the transceiver transmits is different from the number of sub-bands on which the transceiver receives.

23. The communication system of claim 17, wherein the sub-bands belong to two or more bands.

25. A communication system, comprising:

a transceiver having two or more antennas, the transceiver operable in a first mode to transmit a first multi-band orthogonal frequency division multiplex signal in multiple input/multiple output mode and to receive a second multi-band orthogonal frequency division multiplex signal in multiple input/multiple output mode, the transceiver operable in a second mode to transmit concurrently a third multi-band orthogonal frequency division multiplex signal with a first antenna on a first sub-band and to transmit a fourth multi-band orthogonal frequency division multiplex signal with a second antenna on a second sub-band and to receive concurrently a fifth multi-band orthogonal frequency division multiplex signal with the first antenna on a third sub-band and to receive a sixth multi-band orthogonal frequency division multiplex signal with the second antenna on a fourth sub-band.

26. The communication system of claim 25, wherein the first sub-band and second sub-band are the same.

27. The communication system of claim 25, wherein the first sub-band and second sub-band are different.