Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành hóa học dành cho các bạn yêu hóa học tham khảo đề tài: Parallel Multistage Decision Feedback Equalizer for Single-Carrier Layered Space-Time Systems in Frequency-Selective Channels | EURASIP Journal on Applied Signal Processing 2004 10 1489-1497 2004 Hindawi Publishing Corporation Parallel Multistage Decision Feedback Equalizer for Single-Carrier Layered Space-Time Systems in Frequency-Selective Channels Jing Xu National Mobile Communications Research Lab Southeast University Nanjing 210096 China Email xujing@ Haifeng Wang Nokia Mobile Phones Elektroniikkatie 3 90571 Oulu Finland Email Shixin Cheng National Mobile Communications Research Lab Southeast University Nanjing 210096 China Email sxcheng@ Ming Chen National Mobile Communications Research Lab Southeast University Nanjing 210096 China Email chenming@ Received 24 February 2003 Revised 8 January 2004 Space-time transmission techniques can greatly increase the spectral efficiency. In this paper a parallel multistage decision feedback equalizer PMDFE is proposed for single-carrier layered space-time systems with a fixed cyclic prefix over frequency-selective channels. It is composed of a parallel interference canceller a multiple-input single-output decision feedback equalizer MISO-DFE and a linear combiner. The soft output of the MISO-DFE is linearly combined with the previous tentative soft decision. In addition an algorithm is proposed to obtain tentative soft and hard decisions for initializing the equalizer. The initializing complexity of the PMDFE is lower than that of MIMO-OFDM. Simulation results show that the PMDFE outperforms MIMO-OFDM and previously existing equalizers for single-carrier layered space-time systems. Keywords and phrases MIMO OFDM PIC DFE single carrier. 1. INTRODUCTION Conventional technique to mitigate intersymbol interference ISI is equalization in time domain TD . For broadband transmission the complexity of equalization in TD will be very high. Orthogonal frequency division multiplexing OFDM transmission 1 that can be considered as a one-tap linear equalizer is a promising technique to eliminate ISI. However
