Title :
Performance of DTC-OFDM of the LMS Channel in Ka Band
Author :
Da Xin-yu ; Xiang Jing-Lin ; Zhu Hai-feng
Author_Institution :
Northwestern Polytech. Univ., Xi´an
Abstract :
Differential turbo coded OFDM(DTC-OFDM) scheme was presented, together with a differential soft-detection method for Ka-band satellite communications. DTC-OFDM combines Turbo codes, orthogonal frequency division multiplexing (OFDM) modulation and differential detection, which has the advantages of high spectrum efficiency and suppression of multipath fading, jamming and noise. The DTC-OFDM system model and Ka-band satellite communication system simulation model have been found, then we also analyzed the bit error rate (BER) performance of OFDM with N-QAM modulation technique. The results show that DTC-OFDM system gives the best performance compared to convolutional coded (CC) and trellis coded OFDM systems. In the case of 256-QAM, DTC- OFDM system can provide 1 dB coding gain at a BER of 10-4 compared with TCM-OFDM system and 4 dB compared with CC-OFDM system.
Keywords :
OFDM modulation; differential detection; error statistics; interference suppression; jamming; mobile communication; quadrature amplitude modulation; satellite communication; trellis coded modulation; turbo codes; BER performance; DTC-OFDM scheme; Ka band satellite communications; LMS channel; N-QAM modulation technique; bit error rate performance; convolutional coded OFDM systems; differential soft-detection method; differential turbo coded orthogonal frequency division multiplexing scheme; gain 1 dB; gain 4 dB; jamming suppression; land mobile satellite channel; multipath fading suppression; noise suppression; trellis coded OFDM systems; Analytical models; Bit error rate; Error analysis; Fading; Jamming; Least squares approximation; Modulation coding; OFDM modulation; Satellite communication; Turbo codes;
Conference_Titel :
Wireless Communications, Networking and Mobile Computing, 2008. WiCOM '08. 4th International Conference on
Conference_Location :
Dalian
Print_ISBN :
978-1-4244-2107-7
Electronic_ISBN :
978-1-4244-2108-4
DOI :
10.1109/WiCom.2008.234
