中国电子科技2008，Vol.6Issue(3)：269-273,5.
A Simplified Downlink Transmission and Receiving Scheme for IDMA
A Simplified Downlink Transmission and Receiving Scheme for IDMA
摘要
Abstract
In this paper, we propose a downlink transmission and receiving scheme for interleave-division multiple access (IDMA) system based on time-division duplexing (TDD) mode and time-reversal (TR) technique. The proposed scheme uses the time-reversed version of the channel impulse responses (CIR) obtained from the uplink to pre-process the transmitted signal at base station. By exploiting the weak correlations of fading channels for different user ends (UE), it is helpful to alleviate the multi-user interference (MUI) and co-channel interference (CCI). Moreover, the application of the TR technique in a multiple input-single output (MISO) configuration can reduce the delay spread of the channel impulse response, and mitigate inter-symbol interference (ISI). The UE can be simplified by canceling the iteration operation. Thus the data detection of the proposed scheme is rather simple as compared with the traditional IDMA, the complexity and computational load of UE is decreased substantially, and the proposed scheme provides a great deal of privacy and security to mobile users.关键词
Downlink/interleave-division multipleaccess/multi-user detection/multiple input-single output/time-reversal techniqueKey words
Downlink/interleave-division multipleaccess/multi-user detection/multiple input-single output/time-reversal technique分类
信息技术与安全科学引用本文复制引用
Xing-Zhong Xiong,Jian-Hao Hu..A Simplified Downlink Transmission and Receiving Scheme for IDMA[J].中国电子科技,2008,6(3):269-273,5.基金项目
This work was supported by the Nature Science Founding of China under Grant. No. 60496313, and National Basic Research Program of China under Grant No.2007CB310604. （）
