| Paper: | SPCOM-P7.7 | ||
| Session: | MIMO Receiver Algorithms | ||
| Time: | Thursday, May 20, 09:30 - 11:30 | ||
| Presentation: | Poster | ||
| Topic: | Signal Processing for Communications: Multi-Carrier, OFDM, and DMT Systems | ||
| Title: | A LOW COMPLEXITY VBLAST OFDM DETECTION ALGORITHM | ||
| Authors: | Yan Wu; Institute for Infocomm Research | ||
| Sumei Sun; Institute for Infocomm Research | |||
| Zhongding Lei; Institute for Infocomm Research | |||
| Abstract: | In this paper, we propose a low complexity VBLAST OFDM detection algorithm. In this method, we partition the subcarriers into a number of groups. The group size is determined by the frequency correlation between different subcarriers. Within each group, we use conventional VBLAST detection on the centre subcarrier and record the detection order. For the rest of the subcarriers in the group, we use QR decomposition technique according to the recorded detection order. This is because the frequency correlation within the group is high and the optimal detection order can be assumed unchanged. We show that this algorithm significantly reduces the complexity of VBLAST OFDM detection. Savings in computation as high as 80% can be achieved for some systems. Moreover, we show through computer simulations that the degradation in error performance of the proposed algorithm is very small compared to conventional detection. | ||
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