Abstract
Spatial spreading is performed in a multi-antenna system to randomize an effective channel observed by a receiving entity for each transmitted data symbol block. For a MIMO system at a transmitting entity data is processed (e.g. encoded interleaved and modulated) to obtain N D data symbol blocks to be transmitted in NM transmission spans where ND?1 and NM>1. The ND blocks are partitioned into NM data symbol subblocks one subblock for each transmission span. A steering matrix is selected (e.g. in a deterministic or pseudo-random manner from among a set of L steering matrices where L>1) for each subblock. Each data symbol subblock is spatially processed with the steering matrix selected for that subblock to obtain transmit symbols which are further processed and transmitted via NT transmit antennas in one transmission span. The ND data symbol blocks are thus spatially processed with NM steering matrices and observe an ensemble of channels.
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Technologies
Multiple-Input Multiple-Output(MIMO)/Massive MIMO
Product
Use Cases
Wireless communication
Services
Claim
1. A method of processing data for transmission in a wireless multiple-input multiple-output (MIMO) communication system, comprising:
processing data to obtain at least one block of data symbols;
performing spatial processing on the at least one block of data symbols with a plurality of steering matrices to obtain a plurality of sequences of transmit symbols for a plurality of transmit antennas, wherein the plurality of steering matrices randomize an effective MIMO channel observed by a receiving entity for the at least one block of data symbols; and
partitioning the at least one block of data symbols into a plurality of subblocks of data symbols; and
selecting a steering matrix for each subblock of data symbols, and wherein the performing spatial processing on the at least one block of data symbols comprises performing spatial processing on each subblock of data symbols with the steering matrix selected for the subblock,
wherein the partitioning the at least one block of data symbols comprises
partitioning a single block of data symbols into a plurality of subblocks of data symbols.', 'processing data to obtain at least one block of data symbols;', 'performing spatial processing on the at least one block of data symbols with a plurality of steering matrices to obtain a plurality of sequences of transmit symbols for a plurality of transmit antennas, wherein the plurality of steering matrices randomize an effective MIMO channel observed by a receiving entity for the at least one block of data symbols; and', 'partitioning the at least one block of data symbols into a plurality of subblocks of data symbols; and', 'selecting a steering matrix for each subblock of data symbols, and wherein the performing spatial processing on the at least one block of data symbols comprises performing spatial processing on each subblock of data symbols with the steering matrix selected for the subblock,', 'wherein the partitioning the at least one block of data symbols comprises', 'partitioning a single block of data symbols into a plurality of subblocks of data symbols.
2. A method of processing data for transmission in a wireless multiple-input multiple-output (MIMO) communication system, comprising:
processing data to obtain at least one block of data symbols;
performing spatial processing on the at least one block of data symbols with a plurality of steering matrices to obtain a plurality of sequences of transmit symbols for a plurality of transmit antennas, wherein the plurality of steering matrices randomize an effective MIMO channel observed by a receiving entity for the at least one block of data symbols; and
partitioning the at least one block of data symbols into a plurality of subblocks of data symbols; and
selecting a steering matrix for each subblock of data symbols, and wherein the performing spatial processing on the at least one block of data symbols comprises performing spatial processing on each subblock of data symbols with the steering matrix selected for the subblock,
wherein the partitioning the at least one block of data symbols comprises
partitioning a plurality of blocks of data symbols into a plurality of subblocks of data symbols.', 'processing data to obtain at least one block of data symbols;', 'performing spatial processing on the at least one block of data symbols with a plurality of steering matrices to obtain a plurality of sequences of transmit symbols for a plurality of transmit antennas, wherein the plurality of steering matrices randomize an effective MIMO channel observed by a receiving entity for the at least one block of data symbols; and', 'partitioning the at least one block of data symbols into a plurality of subblocks of data symbols; and', 'selecting a steering matrix for each subblock of data symbols, and wherein the performing spatial processing on the at least one block of data symbols comprises performing spatial processing on each subblock of data symbols with the steering matrix selected for the subblock,', 'wherein the partitioning the at least one block of data symbols comprises', 'partitioning a plurality of blocks of data symbols into a plurality of subblocks of data symbols.
3. A method of processing data for transmission in a wireless multiple-input multiple-output (MIMO) communication system, comprising:
processing data to obtain at least one block of data symbols;
performing spatial processing on the at least one block of data symbols with a plurality of steering matrices to obtain a plurality of sequences of transmit symbols for a plurality of transmit antennas, wherein the plurality of steering matrices randomize an effective MIMO channel observed by a receiving entity for the at least one block of data symbols; and
partitioning the at least one block of data symbols into a plurality of subblocks of data symbols; and
selecting a steering matrix for each subblock of data symbols, and wherein the performing spatial processing on the at least one block of data symbols comprises performing spatial processing on each subblock of data symbols with the steering matrix selected for the subblock,
wherein the partitioning the at least one block of data symbols comprises
partitioning the at least one block of data symbols into a plurality of subblocks of data symbols such that each subblock includes data symbols from each of the at least one block.', 'processing data to obtain at least one block of data symbols;', 'performing spatial processing on the at least one block of data symbols with a plurality of steering matrices to obtain a plurality of sequences of transmit symbols for a plurality of transmit antennas, wherein the plurality of steering matrices randomize an effective MIMO channel observed by a receiving entity for the at least one block of data symbols; and', 'partitioning the at least one block of data symbols into a plurality of subblocks of data symbols; and', 'selecting a steering matrix for each subblock of data symbols, and wherein the performing spatial processing on the at least one block of data symbols comprises performing spatial processing on each subblock of data symbols with the steering matrix selected for the subblock,', 'wherein the partitioning the at least one block of data symbols comprises', 'partitioning the at least one block of data symbols into a plurality of subblocks of data symbols such that each subblock includes data symbols from each of the at least one block.
4. A method of processing data for transmission in a wireless multiple-input multiple-output (MIMO) communication system, comprising:
processing data to obtain at least one block of data symbols;
performing spatial processing on the at least one block of data symbols with a plurality of steering matrices to obtain a plurality of sequences of transmit symbols for a plurality of transmit antennas, wherein the plurality of steering matrices randomize an effective MIMO channel observed by a receiving entity for the at least one block of data symbols; and
partitioning the at least one block of data symbols into a plurality of subblocks of data symbols;
selecting a steering matrix for each subblock of data symbols, and wherein the performing spatial processing on the at least one block of data symbols comprises performing spatial processing on each subblock of data symbols with the steering matrix selected for the subblock; and
transmitting the plurality of subblocks of spatially processed data symbols in a plurality of transmission spans, one subblock in each transmission span.', 'processing data to obtain at least one block of data symbols;', 'performing spatial processing on the at least one block of data symbols with a plurality of steering matrices to obtain a plurality of sequences of transmit symbols for a plurality of transmit antennas, wherein the plurality of steering matrices randomize an effective MIMO channel observed by a receiving entity for the at least one block of data symbols; and', 'partitioning the at least one block of data symbols into a plurality of subblocks of data symbols;', 'selecting a steering matrix for each subblock of data symbols, and wherein the performing spatial processing on the at least one block of data symbols comprises performing spatial processing on each subblock of data symbols with the steering matrix selected for the subblock; and', 'transmitting the plurality of subblocks of spatially processed data symbols in a plurality of transmission spans, one subblock in each transmission span.', '5. A method of processing data for transmission in a wireless multiple-input multiple-output (MIMO) communication system, comprising:
processing data to obtain at least one block of data symbols;
performing spatial processing on the at least one block of data symbols with a plurality of steering matrices to obtain a plurality of sequences of transmit symbols for a plurality of transmit antennas, wherein the plurality of steering matrices randomize an effective MIMO channel observed by a receiving entity for the at least one block of data symbols; and
partitioning the at least one block of data symbols into a plurality of subblocks of data symbols;
selecting a steering matrix for each subblock of data symbols, and wherein the performing spatial processing on the at least one block of data symbols comprises performing spatial processing on each subblock of data symbols with the steering matrix selected for the subblock; and
transmitting each subblock of spatially processed data symbols from the plurality of transmit antennas in one symbol period.', 'processing data to obtain at least one block of data symbols;', 'performing spatial processing on the at least one block of data symbols with a plurality of steering matrices to obtain a plurality of sequences of transmit symbols for a plurality of transmit antennas, wherein the plurality of steering matrices randomize an effective MIMO channel observed by a receiving entity for the at least one block of data symbols; and', 'partitioning the at least one block of data symbols into a plurality of subblocks of data symbols;', 'selecting a steering matrix for each subblock of data symbols, and wherein the performing spatial processing on the at least one block of data symbols comprises performing spatial processing on each subblock of data symbols with the steering matrix selected for the subblock; and', 'transmitting each subblock of spatially processed data symbols from the plurality of transmit antennas in one symbol period.', '6. A method of processing data for transmission in a wireless multiple-input multiple-output (MIMO) communication system, comprising:
processing data to obtain at least one block of data symbols;
performing spatial processing on the at least one block of data symbols with a plurality of steering matrices to obtain a plurality of sequences of transmit symbols for a plurality of transmit antennas, wherein the plurality of steering matrices randomize an effective MIMO channel observed by a receiving entity for the at least one block of data symbols; and
partitioning the at least one block of data symbols into a plurality of subblocks of data symbols;
selecting a steering matrix for each subblock of data symbols, and wherein the performing spatial processing on the at least one block of data symbols comprises performing spatial processing on each subblock of data symbols with the steering matrix selected for the subblock; and
transmitting each subblock of spatially processed data symbols from the plurality of transmit antennas on a respective group of at least one frequency subband.', 'processing data to obtain at least one block of data symbols;', 'performing spatial processing on the at least one block of data symbols with a plurality of steering matrices to obtain a plurality of sequences of transmit symbols for a plurality of transmit antennas, wherein the plurality of steering matrices randomize an effective MIMO channel observed by a receiving entity for the at least one block of data symbols; and', 'partitioning the at least one block of data symbols into a plurality of subblocks of data symbols;', 'selecting a steering matrix for each subblock of data symbols, and wherein the performing spatial processing on the at least one block of data symbols comprises performing spatial processing on each subblock of data symbols with the steering matrix selected for the subblock; and', 'transmitting each subblock of spatially processed data symbols from the plurality of transmit antennas on a respective group of at least one frequency subband.']
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