Interference randomization in orthogonal cover codes
AssigneeQUALCOMM Incorporated
InventorsSyed Hashim Ali SHAH, Ayan SENGUPTA, Alberto RICO ALVARINO, Xiao Feng WANG, Liangping MA
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Abstract
Certain aspects of the present disclosure provide techniques for selecting a first orthogonal cover code (OCC) codeword from an OCC matrix for a transmission occurring during a first transmission time interval based on a first pseudo-random codeword allocator function, such as a first pseudo-random permutation matrix, corresponding to the first transmission time interval; and sending the transmission during the first transmission time interval using the first OCC codeword.
Claims29
An apparatus configured for wireless communications, comprising:
- one or more memories comprising processor-executable instructions;
- and one or more processors configured to execute the processor-executable instructions and cause the apparatus to:
- select a first orthogonal cover code (OCC) codeword from an OCC matrix for a transmission occurring during a first transmission time interval based on a first pseudo-random codeword allocator function corresponding to the first transmission time interval;
- and
- send the transmission during the first transmission time interval using the first OCC codeword.
The apparatus of claim 3, wherein the one or more processors are configured to execute the processor-executable instructions and further cause the apparatus to generate, for each transmission time interval within a predefined transmission timeframe, a pseudo-random codeword allocator function using the seed value. 5 The apparatus of claim 4, wherein generation of the pseudo-random codeword allocator function is based on a combination of the seed value and a predefined codeword allocator function.
An apparatus configured for wireless communications, comprising:
- one or more memories comprising processor-executable instructions;
- and one or more processors configured to execute the processor-executable instructions and cause the apparatus to:
- obtain a transmission encoded with an OCC codeword during a first transmission time interval within a predefined transmission timeframe, the transmission from a first user equipment;
- select, from a plurality of pseudo-random codeword allocator functions, a pseudo-random codeword allocator function corresponding to the first transmission time interval;
- select the OCC codeword from an OCC matrix corresponding to the first user equipment and based on the selected pseudo-random codeword allocator function;
- and
- decode the transmission with the selected OCC codeword corresponding to the first user equipment.
A method for wireless communications by an apparatus, comprising:
- selecting a first orthogonal cover code (OCC) codeword from an OCC matrix for a transmission occurring during a first transmission time interval based on a first pseudo-random codeword allocator function corresponding to the first transmission time interval;
- and
- sending the transmission during the first transmission time interval using the first OCC codeword.
A method for wireless communications by an apparatus, comprising:
- obtaining a transmission encoded with an OCC codeword during a first transmission time interval within a predefined transmission timeframe, the transmission from a first user equipment;
- selecting, from a plurality of pseudo-random codeword allocator functions, a pseudo-random codeword allocator function corresponding to the first transmission time interval;
- selecting the OCC codeword from an OCC matrix corresponding to the first user equipment and based on the selected pseudo-random codeword allocator function;
- and
- decoding the transmission with the selected OCC codeword corresponding to the first user equipment.
Dependencies are inferred from the claim text.