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 ND 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 wireless communication apparatus, comprising:
a data processor configured to process data to obtain at least one block of data symbols; and a spatial processor configured to spatially process 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. wherein the spatial processor is configured to partition the at least one block of data symbols into a plurality of subblocks of data symbols, wherein the spatial processor is configured to select a steering matrix for each subblock of data symbols, wherein the spatial processor is configured to spatially process each subblock of data symbols with the steering matrix selected for the subblock, and 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.
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The information in blue was extracted from the third parties (Standard Setting Organisation, Espacenet)
The information in grey was provided by the patent holder
The information in purple was extracted from the FrandAvenue
Explicitly disclosed patent:openly and comprehensibly describes all details of the invention in the patent document.
Implicitly disclosed patent:does not explicitly state certain aspects of the invention, but still allows for these to be inferred from the information provided.
Basis patent:The core patent in a family, outlining the fundamental invention from which related patents or applications originate.
Family member:related patents or applications that share a common priority or original filing.