OFDM Blind Signal Detection Based on the Sphere Decoder

摘要：

The detection ordering for the sphere decoder (SD) and its application in the blind signal detection of the timevarying orthogonal frequency division multiplexing (OFDM) systems are considered. For any matrix H and any permutation matrix P, the equation HP = QR always holds where P represents the detection ordering. In order to find an appropriate P to reduce the SD search complexity, we propose a novel detection ordering mechanism based on the principle of maximizing the minimal row entry (MMRE). Its corresponding QR factorization method is also presented. Different from other ordering mechanisms, the MMRE mechanism prevents the SD search from going deep on the incorrect subtrees by introducing an error-amplifying strategy. The simulations prove the effectiveness of the MMRE.

关键词： OFDM Sphere decoder Ordering QR

作者: Fang Chengzhi Du Sidan Ni Liangfang

作者单位: Electronic Engineering Department of Nanjing University Nanjing, Jiangsu, 210093, China

会议类型: 国际会议

会议名称: 第三届IEEE无线通讯、网络技术暨移动计算国际会议

会议地点: 上海

会议语种:英文

在线出版日期: 2007-09-21（万方平台首次上网日期，不代表论文的发表时间）