Performance of LDPC Coded AOFDM Under Frequency-Selective Fading Channel

摘要：

In this paper, LDPC code is combined with adaptive OFDM. Code rate of LDPC is fixed and modulation mode of sub-carriers can vary according to CQI. Throughput analysis of the scheme under frequency-selective fading channel and theory of sub-band based LDPC coded AOFDM is given. Computer simulation under 12-tap TU fading channel was carried out. Results show that the LDPC coded AOFDM scheme exhibits BER performance quite close to that with fixed QPSK modulation due to existence of LDPC, meanwhile brings much higher throughput than non-adaptive schemes because of adaptation. The sub-band based adaptation has a little degradation in throughput, but reduces signaling cost greatly. LDPC coded AOFDM guarantees system reliability and improves throughput a lot.

作者: Zhou Mingyu Li Lihua Wen Na Zhang Ping

作者单位: Wireless Technologies Innovation Institute, P. O. Box 92 Beijing University of Posts and Telecommunications, 100876 Beijing, China

会议类型: 国际会议

会议名称: 2006 International Conference on Communications,Circuits and Systems(第四届国际通信、电路与系统学术会议)

会议地点: 广西桂林

会议语种:英文

页码: 861-865

在线出版日期: 2006-06-25（万方平台首次上网日期，不代表论文的发表时间）