Differential space-time block-diagonal codes  

作　　者：LUO ZhenDong LIU YuanAn GAO dinChun 

机构地区：[1]School of Telecommunication Engineering, Beijing University of Posts and Telecommunications, Beijing 100876, China [2]Bell Labs Research China, AlcateI-Lucent, Beijing 100080, China [3]Department of Electronic Engineering, Tsinghua University, Beijing 100084, China

出　　处：《Science in China(Series F)》2007年第5期747-759,共13页中国科学（F辑英文版）

基　　金：Supported by the National 863 Program of China (Grant No. 2003AA12331004)

摘　　要：A new differential space-time code, called differential space-time block-diagonal code （DSTBDC）, is proposed for multiple-input multiple-output （MIMO） wireless communication systems. By exploiting the block-diagonal construction of DSTBDC, we can design a variety of high-performance DSTBDC, especially for the cases of large numbers of transmit antennas and high date rates. In flat fading channels, DSTBDC outperforms traditional differential space-time codes if the data rate is higher than 1 bps/Hz, especially when the number of transmit antennas is large. In frequency-selective fading channels, multiple-input multiple-output orthogonal frequency-division multiplexing （MIMO-OFDM） systems using DSTBDC have the powerful ability to achieve very high diversity gain in space, time, and frequency simultaneously. Due to the special orthogonal construction, DSTBDC has a simple decoding algorithm. In addition, DSTBDC can significantly save the cost of radio frequency circuits.A new differential space-time code, called differential space-time block-diagonal code （DSTBDC）, is proposed for multiple-input multiple-output （MIMO） wireless communication systems. By exploiting the block-diagonal construction of DSTBDC, we can design a variety of high-performance DSTBDC, especially for the cases of large numbers of transmit antennas and high date rates. In flat fading channels, DSTBDC outperforms traditional differential space-time codes if the data rate is higher than 1 bps/Hz, especially when the number of transmit antennas is large. In frequency-selective fading channels, multiple-input multiple-output orthogonal frequency-division multiplexing （MIMO-OFDM） systems using DSTBDC have the powerful ability to achieve very high diversity gain in space, time, and frequency simultaneously. Due to the special orthogonal construction, DSTBDC has a simple decoding algorithm. In addition, DSTBDC can significantly save the cost of radio frequency circuits.

关 键 词：wireless communications MIMO systems differential modulation space-time coding OFDM 

分 类 号：TN92[电子电信—通信与信息系统]