Low power distributed transmitter

• US 7,555,059 B2
• Filed: 11/01/2006
• Issued: 06/30/2009
• Est. Priority Date: 12/18/2001
• Status: Expired due to Fees

• Current Assignee: VIXS Systems Incorporated (Pixelworks Incorporated)
• Original Assignee: VIXS Systems Incorporated (Pixelworks Incorporated)
• Inventors: May, Michael, Rybicki, Mathew A., Cave, Michael, Markison, Timothy W
• Primary Examiner(s): TSE, YOUNG TOI
• Application Number:
  US11/591,405
• Publication Number:
  US 20090022240A1
• Time in Patent Office: 972 Days
• Field of Search: 375/146, 375/219, 375/222, 375/260, 375/267, 375/295, 375/297, 370/208, 370/210, 330/149, 330/124.R, 455/13.4, 455/101, 455/103, 455/114.2, 455/114.3
• US Class Current: 375/297
• CPC Class Codes: H03F 1/0205 in transistor amplifiers
• CPC Class Codes: H03F 1/0277 Selecting one or more amplifiers from a plurality of amplifiers
• CPC Class Codes: H03F 2200/336 A I/Q, i.e. phase quadrature, modulator or demodulator being used in an amplifying circuit
• CPC Class Codes: H03F 2200/451 the amplifier being a radio frequency amplifier
• CPC Class Codes: H03F 2203/21112 A filter circuit being added at the input of a power amplifier stage
• CPC Class Codes: H03F 2203/7236 the gated amplifier being switched on or off by putting into parallel or not, by choosing between amplifiers by (a ) switch(es)
• CPC Class Codes: H03F 3/211 using a combination of several amplifiers H03F3/60 takes precedence
• CPC Class Codes: H03F 3/24 of transmitter output stages
• CPC Class Codes: H03F 3/602 Combinations of several amplifiers
• CPC Class Codes: H03F 3/72 Gated amplifiers, i.e. amplifiers which are rendered operative or inoperative by means of a control signal
• CPC Class Codes: H04L 27/2601 Multicarrier modulation systems

Abstract

A low power distributed transmitter includes a signal generator, signal partitioning module, signal processing module, a plurality of amplifiers, and a transmitting module. The signal generator is operably coupled to generate a signal to represent base-band data in accordance with a particular transmission protocol. The signal partitioning module is operably coupled to partition the signal into a plurality of signal partitions based on a peak-to-average ratio of the signal. The signal processing module processes the plurality of signal partitions to in accordance with the particular transmission protocol to produce processed signals. Each of the amplifiers amplifies a corresponding one of the processed signal partitions to produce amplified signal partitioned. The transmitting module transmits, via an antenna or a plurality of antennas, the amplified signal partitions as a composite amplified signal.

Claims

1. A low power transmitter comprises:

a signal generator operably coupled to generate a signal to represent data based on a first aspect of a transmission protocol;

a signal partitioning module operably coupled to partition the signal based on peak-to-average ratio of the signal to produce a plurality of signal partitions;

a signal processing module operably coupled to process each of the plurality of signal partitions based on a second aspect of the transmission protocol to produce a plurality of processed signal partitions;

a plurality of amplifiers, wherein each of the plurality of the amplifiers amplifies a corresponding one of the plurality of processed signal partitions to produce a plurality of amplified signal partitions; and

a transmitting module operably coupled to transmit the plurality of amplified signal partitions as a composite amplified signal.

2. The low power transmitter of claim 1, wherein the signal generator comprises:

a symbol generator operably coupled to produce symbols that represent the data in a frequency domain based on the first aspect of the transmission protocol;

a frequency-to-time conversion module operably coupled to convert the symbols into a time domain signal; and

a filtering module operably coupled to filter the time domain signal to produce the signal, wherein the transmission protocol includes at least one of;

orthogonal frequency

division multiplexing (OFDM), binary phase shift keying (BPSK), quadrature phase shift keying (QPSK), quadrature amplitude modulation (QAM), and discrete multi-tone (DMT).

3. The low power transmitter of claim 2, wherein the transmitting module comprises:

a summing module operably coupled to sum the plurality of amplified signal partitions to produce a transmission signal; and

an antenna operably coupled to transmit, as a radio frequency signal, the transmission signal.

4. The low power transmitter of claim 2, wherein the transmitting module comprises:

a plurality of antennas that correspondingly transmits the plurality of amplified signal partitions such that, when transmitted, the plurality of amplified signal partitions sum together in air to produce the composite amplified signal.

5. The low power transmitter of claim 1, wherein each of the plurality of amplifiers comprises:

a Class A power amplifier having a selected output impedance.

6. A method for low power transmissions, the method comprises:

generating a signal to represent data based on a first aspect of a transmission protocol;

partitioning the signal based on peak-to-average ratio of the signal to produce a plurality of signal partitions;

processing each of the plurality of signal partitions based on a second aspect of the transmission protocol to produce a plurality of processed signal partitions; and

providing the plurality of processed signal partitions to a plurality of amplifiers such that each of the plurality of the amplifiers amplifies a corresponding one of the plurality of processed signal partitions.

7. The method of claim 6, wherein the generating the signal comprises:

producing symbols that represent the data in a frequency domain based on the first aspect of the transmission protocol;

frequency-to-time converting the symbols into a time domain signal; and

filtering the time domain signal to produce the signal, wherein the transmission protocol includes at least one of;

orthogonal frequency division multiplexing (OFDM),

binary phase shift keying (BPSK), quadrature phase shift keying (QPSK), quadrature amplitude modulation (QAM), and discrete multi-tone (DMT).

8. An apparatus for low power transmissions, the apparatus comprises:

a processing module; and

a memory operably coupled to the processing module, wherein the memory includes operational instructions that cause the processing module to;

generate a signal to represent data based on a first aspect of a transmission protocol;

partition the signal based on peak-to-average ratio of the signal to produce a plurality of signal partitions;

process each of the plurality of signal partitions based on a second aspect of the transmission protocol to produce a plurality of processed signal partitions; and

provide the plurality of processed signal partitions to a plurality of amplifiers such that each of the plurality of the amplifiers amplifies a corresponding one of the plurality of processed signal partitions.

9. The apparatus of claim 8, wherein the memory further comprises operational instructions that cause the processing module to generate the signal by:

producing symbols that represent the data in a frequency domain based on the first aspect of the transmission protocol;

frequency-to-time converting the symbols into a time domain signal; and

filtering the time domain signal to produce the signal, wherein the transmission protocol includes at least one of;

orthogonal frequency division multiplexing (OFDM), binary phase shift keying (BPSK), quadrature phase shift keying (QPSK), quadrature amplitude modulation (QAM), and discrete multi-tone (DMT).