A Model of Turbo Code Based on OFDM-CDMA

摘要：

A model of Turbo code based on OFDM-CDMA (Orthogonal Frequency Division Multiplexing and Code Division Multiple Access) is proposed in this paper. The model consists of three parts, channel code, extending frequency and the modulation of the multicarrier, which has prominent advantages that making full use of the frequency spectrum, overcoming ISI (Inter Symbol Interference), high reliability and good capability of overcoming multipath fading. Log-Map and Sova algorithms are adopted to decode here, and simulated by MATLAB. The results of the simulation show that when decoded with Log-Map algorithm, the BER (Bit Error Rate) performance of Turbo code under this model is improved about 0.3dB than which without adopting this model; When decoded with Sova algorithm, the BER performance of Turbo code under this model is improved about 0.1dB than which without adopting this model. The calculation of Log-Map algorithm is obviously more complex than Sova algorithm. The simulation results show that the proposed model has favorable decoding performance, and is suitable for further researching.

关键词： Turbo code OFDM-CDMA BER

作者: Liu Na Shi Wenxiao Wu Jiang

作者单位: College of Communication Engineering,Jilin University,Changchun 130012,China

会议类型: 国际会议

会议名称: 第二届IEEE无线通讯、网络技术暨移动计算国际会议

会议地点: 武汉

会议语种:英文

在线出版日期: 2006-09-01（万方平台首次上网日期，不代表论文的发表时间）