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. (canceled)
2. A method of processing data for transmission in a wireless multiple-input multiple-output (MIMO) communication system, comprising:
partitioning at least one block of data symbols into a plurality of subblocks of data symbols; and spatial processing each subblock of the plurality of subblocks of data symbols with a steering matrix selected from a plurality of steering matrices to obtain a plurality of transmit symbols for a plurality of transmit antennas, wherein the plurality of steering matrices for the plurality of subblocks of data symbols are independent of Channel State Information (CSI) and the spatial processing using the plurality of steering matrices randomizes an effective MIMO channel observed in reception of the plurality of subblocks of data symbols.
3. The method of claim 2, further comprising processing data to obtain the at least one block of data symbols, wherein the processing of data includes:
encoding data to generate at least one block of coded data; and symbol mapping each block of coded data to obtain a corresponding block of data symbols.
4. The method of claim 2, wherein each subblock includes data symbols from at least two blocks of the at least one block of data symbols.
5. The method of claim 4, further comprising transmitting the plurality of subblocks of spatially processed data symbols in a plurality of transmission spans, one subblock in each transmission span.
6. The method of claim 4, further comprising transmitting each subblock of spatially processed data symbols from the plurality of transmit antennas in one symbol period.
7. The method of claim 4, further comprising transmitting each subblock of spatially processed data symbols from the plurality of transmit antennas on a respective group of at least one frequency subband.
8. The method of claim 4, further comprising transmitting the plurality of transmit symbols from the plurality of transmit antennas.
9. The method of claim 4, further comprising selecting the plurality of steering matrices from among a set of L steering matrices, where L is an integer greater than one.
10. The method of claim 4, further comprising selecting the plurality of steering matrices from among a set of L steering matrices in a deterministic manner, where L is an integer greater than one.
11. The method of claim 4, further comprising selecting the plurality of steering matrices from among a set of L steering matrices by cycling through the L steering matrices in sequential order, where L is an integer greater than one.
12. The method of claim 4, further comprising selecting the plurality of steering matrices from among a set of L steering matrices in a pseudo-random manner, where L is an integer greater than one.
13. The method of claim 4, further comprising selecting a different steering matrix for each of the plurality of subblocks of data symbols.
14. An apparatus in a wireless multiple-input multiple-output (MIMO) communication system, comprising:
a spatial processor configured to
partition at least one block of data symbols into a plurality of subblocks of data symbols; and
spatially process each subblock of the plurality of subblocks of data symbols with a steering matrix selected from a plurality of steering matrices to obtain a plurality of transmit symbols for a plurality of transmit antennas, wherein the plurality of steering matrices for the plurality of subblocks of data symbols are independent of Channel State Information (CSI) and the spatially processing using the plurality of steering matrices randomizes an effective MIMO channel observed in reception of the plurality of subblocks of data symbols.
15. The apparatus of claim 14, further comprising a data processor configured to process data to obtain at least one block of data symbols, wherein the data processor is further configured to encode data to generate at least one block of coded data and wherein each block of coded data is mapped to obtain a corresponding block of data symbols.
16. The apparatus of claim 14, wherein each subblock includes data symbols from at least two blocks of the at least one block of data symbols.
17. The apparatus of claim 16, further comprising a controller configured to select the steering matrix from among a set of L steering matrices for each of the plurality of subblocks of data symbols, where L is an integer greater than one.
18. The apparatus of claim 17, wherein the controller selects the plurality of steering matrices from among the set of L steering matrices in a deterministic manner.
19. The apparatus of claim 17, wherein the controller selects the plurality of steering matrices from among the set of L steering matrices in a pseudo-random manner.
20. The apparatus of claim 16, wherein the MIMO system utilizes orthogonal frequency division multiplexing (OFDM).
21. The apparatus of claim 16, further comprising a transmitter configured to transmit the plurality of subblocks of spatially processed data symbols in a plurality of transmission spans, one subblock in each transmission span.
22. A method of processing data for receiving data transmission in a wireless multiple-input multiple-output (MIMO) communication system, comprising:
receiving data symbols of a plurality of subblocks of data; and spatial processing the received data symbols for each subblock of data of the plurality of subblocks with a steering matrix selected from a plurality of steering matrices to obtain a plurality of detected symbols, wherein the plurality of steering matrices are independent of Channel State Information (CSI) and the spatial processing using the plurality of steering matrices randomizes an effective MIMO channel observed in reception of the plurality of subblocks of data symbols.
23. The method of claim 22, further comprising processing the plurality of detected symbols to obtain the decoded data, wherein the processing of the plurality of detected symbols includes demapping, deinterleaving, and decoding to obtain the decoded data.
24. The method of claim 22, wherein each subblock includes data symbols from at least two of the at least one data symbol block.
25. The method of claim 24, further comprising wirelessly receiving the plurality of subblocks of at least one data symbol block in a plurality of transmission spans, one subblock in each transmission span.
26. The method of claim 24, further comprising wirelessly receiving each subblock of spatially processed data symbols from a plurality of transmit antennas in one symbol period.
27. The method of claim 24, further comprising wirelessly receiving each subblock of spatially processed data symbols from a plurality of transmit antennas on a respective group of at least one frequency subband.
28. The method of claim 24, further comprising wirelessly receiving the plurality of subblocks from a plurality of transmit antennas.
29. The method of claim 24, further comprising selecting the plurality of steering matrices from among a set of L steering matrices, where L is an integer greater than one.
30. The method of claim 24, further comprising selecting the plurality of steering matrices from among a set of L steering matrices in a deterministic manner, where L is an integer greater than one.
31. The method of claim 24, further comprising selecting the plurality of steering matrices from among a set of L steering matrices by cycling through the L steering matrices in sequential order, where L is an integer greater than one.
32. The method of claim 24, further comprising selecting the plurality of steering matrices from among a set of L steering matrices in a pseudo-random manner, where L is an integer greater than one.
33. The method of claim 24, further comprising selecting a different steering matrix for each of the plurality of subblocks of data symbols.
34. An apparatus in a wireless multiple-input multiple-output (MIMO) communication system, comprising:
a plurality of receiver units configured to receive data symbols for a plurality of subblocks of data; and a spatial processor configured to spatially process the received data symbols for each subblock of data of the plurality of subblocks with a steering matrix selected from a plurality of steering matrices to obtain a plurality of detected symbols, wherein the plurality of steering matrices are independent of Channel State Information (CSI) and the spatial processing using the plurality of steering matrices randomizes an effective MIMO channel observed in reception of the plurality of subblocks of data symbols.
35. The apparatus of claim 34, wherein each subblock includes data symbols from at least two of the at least one data symbol block.
36. The apparatus of claim 35, further comprising a data processor configured to obtain decoded data from the plurality of detected symbols, wherein the data processor is further configured to demap, deinterleave, and decode the plurality of detected symbols to obtain the decoded data.
37. The apparatus of claim 35, further comprising a controller configured to select the steering matrix from among a set of L steering matrices for each of the plurality of subblocks of data symbols, where L is an integer greater than one.
38. The apparatus of claim 37, wherein the controller selects the plurality of steering matrices from among the set of L steering matrices in a deterministic manner.
39. The apparatus of claim 37, wherein the controller selects the plurality of steering matrices from among the set of L steering matrices in a pseudo-random manner.
40. The apparatus of claim 35, wherein the MIMO system utilizes orthogonal frequency division multiplexing (OFDM).
41. The apparatus of claim 35, wherein the plurality of receiver units are further configured to wirelessly receive the plurality of subblocks of spatially processed data symbols in a plurality of transmission spans, one subblock in each transmission span.
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SUMMARY
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The information in blue was extracted from the third parties (Standard Setting Organisation, Espacenet)
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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.