Space-Frequency Decision Feedback Equalizer

作者：Kongara Gayathri^*; Taylor Desmond P; Martin Philippa A

来源：IEEE Transactions on Vehicular Technology, 2011, 60(4): 1626-1639.

DOI：10.1109/TVT.2011.2131159

• Channel estimation
• decision feedback equalizer
• frequency domain equalization
• multiple-input-multiple-output (MIMO)

We consider the detection of multiple cochannel single-carrier spatially multiplexed data streams. To this end, we propose a hybrid time-frequency-domain decision feedback equalizer, which performs parallel detection of the data streams. A practical parameter estimation algorithm for these receivers is developed, which estimates the MIMO channel in parallel as a set of effective channel vectors. To avoid interference cancellation, we develop a two-stage frequency-domain (FD) forward section that implements linear cochannel interference (CCI) suppression in cascade with equalization utilizing estimated channel-state information. The resulting receiver architecture outperforms interference cancellation-based equalizers in the presence of channel estimation errors. Furthermore, all transmitted data streams achieve equal diversity gains.

• 出版日期2011-5