A New Modified Gaussian Approximation Detector for Space- Time Bit-Interleaved Coded Modulation Schemes

摘要：

To reduce the receiver complexity of space-time bit-interleaved coded modulation(STBICM) schemes, this paper describes a turbo-type iterative receiver structure consisting of a modified Gaussian approximation detector(MGA) and an a posteriori probability (APP) decoder. Utilizing the characteristics of interleaving and the central limited theorem, MGA first assumes the superposition of the transmitted signals as a Gaussian random variable.Then, P most significant signal combinations are identified to calculate the log-likelihood ratio of each bit.Without any pre-process on the received signals, the proposed method is free of matrix inverse operation and can be applied to systems with more transmitter antennas than receiver antennas. Furthermore,the performance of MGA approaches that of optimal detection under various channel environment.

作者: Ying Li Xudong Guo Xinmei Wang

作者单位: The State Key Lab of ISN Xidian Univeristy Xian, Shaanxi, 710071, China

会议类型: 国际会议

会议名称: 2006年IEEE信息理论国际会议(Proceedings of 2006 IEEE Information Theory Workshop ITW06)

会议地点: 成都

会议语种:英文

页码: 591-595

在线出版日期: 2006-10-22（万方平台首次上网日期，不代表论文的发表时间）