A novel differential multiuser detection algorithm for multiuser MIMO-OFDM systems

作者：Kong, Zheng-min^*; Zhu, Guang-xi; Tong, Qiao-ling; Li, Yan-chun

来源：Journal of Zhejiang University-Science C(Computers and Electronics), 2010, 11(10): 798-807.

DOI：10.1631/jzus.C0910735

• Multiuser detection (MUD)
• Orthogonal frequency division multiplexing (OFDM)
• Multiple-input multiple-output (MIMO)
• Decision feedback equalizer (DFE)
• Error feedback filter (EFF)
• Differential algorithm

We propose an efficient low bit error rate (BER) and low complexity multiple-input multiple-output (MIMO) multiuser detection (MUD) method for use with multiuser MIMO orthogonal frequency division multiplexing (OFDM) systems. It is a hybrid method combining a multiuser-interference-cancellation-based decision feedback equalizer using error feedback filter (MIMO MIC DFE-EFF) and a differential algorithm. The proposed method, termed 'MIMO MIC DFE-EFF with a differential algorithm' for short, has a multiuser feedback structure. We describe the schemes of MIMO MIC DFE-EFF and MIMO MIC DFE-EFF with a differential algorithm, and compare their minimum mean square error (MMSE) performance and computational complexity. Simulation results show that a significant performance gain can be achieved by employing the MIMO MIC DFE-EFF detection algorithm in the context of a multiuser MIMO-OFDM system over frequency selective Rayleigh channel. MIMO MIC DFE-EFF with the differential algorithm improves both computational efficiency and BER performance in a multistage structure relative to conventional DFE-EFF, though there is a small reduction in system performance compared with MIMO MIC DFE-EFF without the differential algorithm.

• 出版日期2010-10
• 单位华中科技大学