Title :
Turbo Equalization of Coded OFDM Symbols in Poor HF Channels
Author :
Ureten, Oktay ; Serinken, Nur
Author_Institution :
Sch. of Inf. Technol. & Eng., Ottawa Univ., Ont.
Abstract :
In this paper, an iterative receiver that utilizes soft outputs of a FEC decoder to improve channel estimates iteratively is proposed. At each iteration, reliable symbols are selected and included in the extended training set. The channel is re-estimated using the extended set at successive iterations. The performance of the proposed technique is tested in simulated poor HF channels and shown to improve the performance by about 2 dB at a BER of 10-4 over the non-iterative case
Keywords :
OFDM modulation; channel coding; channel estimation; equalisers; error statistics; iterative decoding; radio receivers; turbo codes; BER; FEC decoder; HF channel; bit error rate; channel estimation; coded OFDM symbol; iterative receiver; orthogonal frequency division multiplexing; turbo equalization; Bit error rate; Fading; Frequency estimation; Hafnium; Iterative decoding; OFDM; Parity check codes; Quadrature amplitude modulation; Radio broadcasting; Turbo codes; HF modem; LDPC codes; OFDM; turbo equalization;
Conference_Titel :
Electrical and Computer Engineering, 2006. CCECE '06. Canadian Conference on
Conference_Location :
Ottawa, Ont.
Print_ISBN :
1-4244-0038-4
Electronic_ISBN :
1-4244-0038-4
DOI :
10.1109/CCECE.2006.277672
