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A combining of MIMO signal processing with OFDM is regarded as a promising solution of enhancing the performance of next generation WLAN system. Therefore, in this paper, IEEE 802.1 In system employing layered space-time architecture is considered for a high-rate transmission service. However, the IEEE 802.1 In system with V-BLAST scheme has not reached the available capacities due to imperfect nulling and cancellation. In this paper, efficient detection is proposed for IEEE 802.11 n system. In this proposed scheme, T probable streams are detected according to the first detected sub-stream of DFE detector and most probable stream is selected by likelihood test, since the performance of V-BLAST system depends on the first sub-stream detection capability. It has been shown that the performance of IEEE 802.1 In system can be improved by adopting the proposed detection, and the decoding complexity and system performance can be controlled by adjusting the number of T1.
Date of Publication: May 2007