Abstract
Limited feedback precoding (LFP) significantly improves multiple-input-multiple-output (MIMO) spatial multiplexing link reliability with a small amount of feedback from the receiver back to the transmitter. One of the key problems with LFP is how to select an optimal precoder from a predetermined unitary codebook. We find that the conventional precoder selection criteria are not applicable to the full stream transmission mode with linear [zero forcing (ZF) and minimum mean square error (MMSE)] receivers. To solve this issue, a novel singular value decomposition (SVD)-based precoder selection criterion optimizing the bit error rate (BER) performance is proposed in this paper. The proposed criterion features a unified structure for both linear receivers and it can be calculated based on fast matrix computation algorithms. Its effectiveness in the full stream transmission mode is verified by simulation results.
| Original language | English |
|---|---|
| Article number | 6746169 |
| Pages (from-to) | 4092-4096 |
| Number of pages | 5 |
| Journal | IEEE Transactions on Vehicular Technology |
| Volume | 63 |
| Issue number | 8 |
| DOIs | |
| Publication status | Published - 1 Oct 2014 |
| Externally published | Yes |
Keywords
- Limited feedback
- multiple-input-multiple-output (MIMO)
- precoding
- spatial multiplexing
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