Title :
Iterative NR Decoding and Channel Estimation for TDS-OFDM System
Author :
Xie, Qiuliang ; Peng, Kewu ; Yang, Fang ; Yang, Zhixing
Author_Institution :
Dept. of Electron. Eng., Tsinghua Univ., Beijing, China
Abstract :
To improve the overall performance of time-domain synchronous (TDS) orthogonal frequency division multiplexing (OFDM) systems, novel iterative decoding and channel estimation algorithm with Nordstrom-Robinson (NR) code is proposed in this paper. Compared to the non-iterative case, the system performance can be significantly improved by the proposed iterative algorithm at the cost of a little complexity and latency increase. Simulation results show that, for example, with maximum Doppler spread of 25 Hz under two typical multipath channels at bit error rate (BER) of 10-4, the signal to noise ratio (SNR) performance of the proposed iterative algorithm is only 0.2 to 0.3 dB away from the ideal case, and about t dB or more better than the non-iterative one.
Keywords :
OFDM modulation; channel estimation; communication complexity; error statistics; iterative decoding; time-domain analysis; BER; Nordstrom-Robinson code; SNR; TDS-OFDM system; bit error rate; channel estimation; communication complexity; iterative NR decoding; multipath channels; orthogonal frequency division multiplexing systems; signal-to-noise ratio; time-domain synchronous systems; Bit error rate; Channel estimation; Costs; Delay; Iterative algorithms; Iterative decoding; OFDM; Signal to noise ratio; System performance; Time domain analysis;
Conference_Titel :
Global Telecommunications Conference, 2009. GLOBECOM 2009. IEEE
Conference_Location :
Honolulu, HI
Print_ISBN :
978-1-4244-4148-8
DOI :
10.1109/GLOCOM.2009.5425367
