Capacity based rank prediction for MIMO design
First Claim
1. A method of rank prediction, comprising:
- calculating MIMO channel matrices corresponding to layer transmissions for each tone;
calculating signal-to-noise ratios (SNRs) for each tone based on the MIMO channel matrices;
mapping the SNR for each tone to generate effective SNRs for each layer transmission;
calculating additive white Gaussian noise (AWGN) capacities corresponding to the effective SNRs and denoted as Cap1, Cap2, Cap3, Cap4;
selecting an absolute highest Cap of the highest Caps; and
selecting a rank based on the selected absolute highest Cap.
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Abstract
The performance of a Single Code Word (SCW) design with low complexity MMSE receiver & rank prediction is similar to the Multiple Code Word (MCW) design with successive interference cancellation (SIC). A method of rank prediction comprises calculating MIMO channel matrices corresponding to layer transmissions for each tone, calculating signal-to-noise ratios (SNRs) for each tone based on the MIMO channel matrices, mapping the SNR for each tone to generate effective SNRs for each layer transmission, calculating additive white Gaussian noise (AWGN) capacities corresponding to the effective SNRs and maximizing an over-all spectral efficiency based on the AWGN capacities; and selecting a rank based on maximizing the over-all spectral efficiency.
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Citations
11 Claims
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1. A method of rank prediction, comprising:
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calculating MIMO channel matrices corresponding to layer transmissions for each tone;
calculating signal-to-noise ratios (SNRs) for each tone based on the MIMO channel matrices;
mapping the SNR for each tone to generate effective SNRs for each layer transmission;
calculating additive white Gaussian noise (AWGN) capacities corresponding to the effective SNRs and denoted as Cap1, Cap2, Cap3, Cap4;
selecting an absolute highest Cap of the highest Caps; and
selecting a rank based on the selected absolute highest Cap. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A wireless communications device, comprising:
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means for calculating MIMO channel matrices corresponding to layer transmissions for each tone;
means for calculating signal-to-noise ratios (SNRs) for each tone based on the MIMO channel matrices;
means for mapping the SNR for each tone to generate effective SNRs for each layer transmission;
means for calculating additive white Gaussian noise (AWGN) capacities corresponding to the effective SNRs and denoted as Cap1, Cap2, Cap3, Cap4;
means for selecting an absolute highest Cap of the highest Caps; and
means for selecting a rank based on the selected absolute highest Cap.
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10. A processor programmed to execute a method of rank prediction, the method comprising:
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calculating MIMO channel matrices corresponding to layer transmissions for each tone;
calculating signal-to-noise ratios (SNRs) for each tone based on the MIMO channel matrices;
mapping the SNR for each tone to generate effective SNRs for each layer transmission;
calculating additive white Gaussian noise (AWGN) capacities corresponding to the effective SNRs and denoted as Cap1, Cap2, Cap3, Cap4;
selecting an absolute highest Cap of the highest Caps; and
selecting a rank based on the selected absolute highest Cap.
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11. A computer readable media embodying a method of rank prediction, the method comprising:
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calculating MIMO channel matrices corresponding to layer transmissions for each tone;
calculating signal-to-noise ratios (SNRs) for each tone based on the MIMO channel matrices;
mapping the SNR for each tone to generate effective SNRs for each layer transmission;
calculating additive white Gaussian noise (AWGN) capacities corresponding to the effective SNRs and denoted as Cap1, Cap2, Cap3, Cap4;
selecting an absolute highest Cap of the highest Caps; and
selecting a rank based on the selected absolute highest Cap.
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Specification