Wireless MIMO transmitter with antenna and tone precoding blocks
First Claim
1. A wireless transmitter comprising:
- A. plural input serial data bit streams;
B. bit allocation blocks having inputs coupled to the input serial data streams and having outputs, the bit allocation blocks apportioning data bits among available tones and each bit allocation block outputting a quadrature amplitude modulation (QAM) constellation signal point for each tone;
C. tone group precoding matrix blocks having inputs coupled to the outputs of the bit allocation blocks and having outputs, the tone group precoding matrix blocks distributing signal energy across the tone groups for each of the multiple data streams to distribute the data bits across multiple tones and maximize the communications bandwidth of the system;
D. antenna precoding matrix blocks having inputs coupled with the outputs of the tone group precoding matrix blocks and having outputs, the antenna precoding matrix blocks being applied to the tones to distribute the energy of the tones across the antenna precoding matrix block outputs to distribute the data bits across multiple antennas and maximize the communications bandwidth of the system;
E. inverse fast Fourier Transform and parallel to serial blocks having inputs coupled to the outputs of the antenna precoding matrix blocks, and having outputs;
F. digital to analog converters having inputs coupled to the outputs of the inverse fast Fourier Transform and parallel to serial blocks, and having outputs; and
G. a transmit antenna connected to the output of each digital to analog converter.
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Accused Products
Abstract
Various wireless precoding systems and methods are presented. In some embodiments, a wireless transmitter comprises an antenna precoding block, a transform block, and multiple transmit antennas. The antenna precoding block receives frequency coefficients from multiple data streams and distributes the frequency coefficients across multiple transmit signals in accordance with frequency-dependent matrices. The transform block transforms the precoded frequency coefficients into multiple time domain transmit signals to be transmitted by the multiple antennas. The frequency coefficients from multiple data streams may be partitioned into tone groups, and all the frequency coefficients from a given tone group may be redistributed in accordance with a single matrix for that tone group. In some implementations, the frequency coefficients within a tone group for a given data stream may also be precoded. In some alternative embodiments, tone group precoding may be employed in a single channel system.
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Citations
7 Claims
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1. A wireless transmitter comprising:
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A. plural input serial data bit streams; B. bit allocation blocks having inputs coupled to the input serial data streams and having outputs, the bit allocation blocks apportioning data bits among available tones and each bit allocation block outputting a quadrature amplitude modulation (QAM) constellation signal point for each tone; C. tone group precoding matrix blocks having inputs coupled to the outputs of the bit allocation blocks and having outputs, the tone group precoding matrix blocks distributing signal energy across the tone groups for each of the multiple data streams to distribute the data bits across multiple tones and maximize the communications bandwidth of the system; D. antenna precoding matrix blocks having inputs coupled with the outputs of the tone group precoding matrix blocks and having outputs, the antenna precoding matrix blocks being applied to the tones to distribute the energy of the tones across the antenna precoding matrix block outputs to distribute the data bits across multiple antennas and maximize the communications bandwidth of the system; E. inverse fast Fourier Transform and parallel to serial blocks having inputs coupled to the outputs of the antenna precoding matrix blocks, and having outputs; F. digital to analog converters having inputs coupled to the outputs of the inverse fast Fourier Transform and parallel to serial blocks, and having outputs; and G. a transmit antenna connected to the output of each digital to analog converter. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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Specification