Transmit diversity processing for a multi-antenna communication system

A transmitter in a wireless multi-antenna orthogonal frequency division multiplexing (OFDM) communication system, comprising:

• an encoder operative to encode traffic data in accordance with a coding scheme to obtain coded data;
• an interleaver operative to interleave the coded data in accordance with an interleaving scheme to obtain interleaved data;
• a symbol mapping unit operative to symbol map the interleaved data in accordance with a modulation scheme to obtain a stream of data symbols;
• and
• a transmit spatial processor operative to form at least one pair of data symbols from the stream of data symbols and process each pair of data symbols to obtain two pairs of transmit symbols for transmission from a pair of antennas, wherein each transmit symbol is a version of a data symbol, and further wherein the two pairs of transmit symbols are to be transmitted over at least one OFDM subband, and also further wherein the OFDM communication system is capable of adjusting the total number of available subbands.

An apparatus in a wireless multi-antenna orthogonal frequency division multiplexing (OFDM) communication system, comprising:

• means for coding traffic data in accordance with a coding scheme to obtain coded data;
• means for interleaving the coded data in accordance with an interleaving scheme to obtain interleaved data;
• means for symbol mapping the interleaved data in accordance with a modulation scheme to obtain a stream of data symbols;
• means for forming at least one pair of data symbols from the stream of data symbols;
• and
• means for processing each pair of data symbols to obtain two pairs of transmit symbols for transmission from a pair of antennas, wherein each transmit symbol is a version of a data symbol, and further wherein the two pairs of transmit symbols are to be transmitted over at least one OFDM subband, and also further wherein the OFDM communication system is capable of adjusting the total number of available subbands.

A method of processing data for transmission in a wireless multi-antenna communication system, the method comprising:

• coding traffic data in accordance with a coding scheme to obtain coded data;
• interleaving the coded data in accordance with an interleaving scheme to obtain interleaved data;
• symbol mapping the interleaved data in accordance with a modulation scheme to obtain a stream of data symbols;
• and
• forming at least one pair of data symbols from the stream of data symbols;
• and
• demultiplexing the stream of data symbols such that each pair of data symbols is transmitted from a pair of antennas and consecutive pairs of data symbols are transmitted from different pairs of antennas, and further wherein the two pairs of transmit symbols are to be transmitted over at least one OFDM subband, and also further wherein the OFDM communication system is capable of adjusting the total number of available subbands.

A method of processing data for transmission in a wireless multi-antenna orthogonal frequency division multiplexing (OFDM) communication system, the method comprising:

• coding traffic data in accordance with a coding scheme to obtain coded data;
• interleaving the coded data in accordance with an interleaving scheme to obtain interleaved data;
• symbol mapping the interleaved data in accordance with a modulation scheme to obtain a stream of data symbols;
• forming at least one pair of data symbols from the stream of data symbols;
• and
• demultiplexing the stream of data symbols such that each pair of data symbols is transmitted from a pair of antennas on two subbands, and further wherein the OFDM communication system is capable of adjusting the total number of available subbands.

A method of processing data at a receiver in a wireless multi-antenna orthogonal frequency division multiplexing (OFDM) communication system, the method comprising:

• obtaining a stream of vectors of received symbols, each vector including N received symbols for N receive antennas, where N is one or greater;
• forming at least one pair of vectors from the stream of vectors of received symbols;
• processing each pair of vectors to obtain two recovered data symbols, which are estimates of two data symbols transmitted as two pairs of transmit symbols from two transmit antennas, each transmit symbol being a version of a data symbol, wherein a stream of recovered data symbols is obtained for the stream of vectors of received symbols, and further wherein the two pairs of transmit symbols are transmitted over at least one OFDM subband, and also further wherein the OFDM communication system is capable of adjusting the total number of available subbands;
• symbol demapping the stream of recovered data symbols in accordance with a demodulation scheme to obtain demodulated data;
• deinterleaving the demodulated data in accordance with a deinterleaving scheme to obtain deinterleaved data;
• and
• decoding the deinterleaved data in accordance with a decoding scheme to obtain decoded data.

A receiver in a wireless multi-antenna orthogonal frequency division multiplexing (OFDM) communication system, comprising:

• a receive spatial processor operative to receive a stream of vectors of received symbols, form at least one pair of vectors from the stream of vectors of received symbols, and process each pair of vectors to obtain two recovered data symbols, which are estimates of two data symbols transmitted as two pairs of transmit symbols from two transmit antennas, each transmit symbol being a version of a data symbol, wherein each vector includes N received symbols for N receive antennas, where N is one or greater, and wherein a stream of recovered data symbols is obtained for the stream of vectors of received symbols, and further wherein the two pairs of transmit symbols are transmitted over at least one OFDM subband, and also further wherein the OFDM communication system is capable of adjusting the total number of available subbands;
• a symbol demapping unit operative to symbol demap the stream of recovered data symbols in accordance with a demodulation scheme to obtain demodulated data;
• a deinterleaver operative to deinterleave the demodulated data in accordance with a deinterleaving scheme to obtain deinterleaved data;
• and
• a decoder operative to decode the deinterleaved data in accordance with a decoding scheme to obtain decoded data.

An apparatus in a wireless multi-antenna orthogonal frequency division multiplexing (OFDM) communication system, comprising:

• means for obtaining a stream of vectors of received symbols, each vector including N received symbols for N receive antennas, where N is one or greater;
• means for forming at least one pair of vectors from the stream of vectors of received symbols;
• means for processing each pair of vectors to obtain two recovered data symbols, which are estimates of two data symbols transmitted as two pairs of transmit symbols from two transmit antennas, each transmit symbol being a version of a data symbol, wherein a stream of recovered data symbols is obtained for the stream of vectors of received symbols, and further wherein the two pairs of transmit symbols transmitted over at least one OFDM subband, and also further wherein the OFDM communication system is capable of adjusting the total number of available subbands;
• means for symbol demapping the stream of recovered data symbols in accordance with a demodulation scheme to obtain demodulated data;
• means for deinterleaving the demodulated data in accordance with a deinterleaving scheme to obtain deinterleaved data;
• and
• means for decoding the deinterleaved data in accordance with a decoding scheme to obtain decoded data.