混合天线选择的闭环发射分集系统研究     

方勇  朱耀麟 《上海大学学报(英文版)》2008,12(1):61-65

The paper investigates closed-loop transmit diversity （CLTD） systems with antenna selection technique. The expected received signal-noise-ratio （RxSNR） of the proposed systems is analyzed and compared with CLTD systems. An algorithm is proposed for determining the number of increased transmit antennas in terms of a reduced RF chains without performance degradation. Since a feedback channel is bandwidth-limited, we present a method of quantizing transmit-weight vectors. Simulation results demonstrate advantage of the proposed systems with full and quantized feedback information. Quantized feedback has less effect on the proposed systems than CLTD systems.  相似文献   

模糊控制在自调匀整系统中的应用研究     

刘许  李兰君  朱耀麟  朱萧轶 《中国科技纵横》2009,(10):58-59

本文介绍了并条机自调匀整装置的工作原理,通过比较开环、闭环、混合环三种控制模式的特点,提出用模糊控制计算开环延时,该控制模式可使自调匀整系统取得更好的控制效果。  相似文献   

基于BLAST接收机的空间复用天线选择算法     

方勇  朱耀麟 《上海大学学报(英文版)》2006,10(1):20-24

1IntroductionMultiple-input multiple-output(MIMO)systems canoffer significant capacity gains,compared to single-input single-output(SISO)systems.The extra degreesof freedom offered by multiple antennas can be usedfor increasing bit rates through spatial m…  相似文献