Differential Space-Time Coded Impulse Radio Systems Using MIMO Autocorrelation Receivers in UWB Channel
Differential Space-Time Coded Impulse Radio Systems Using MIMO Autocorrelation Receivers in UWB Channel
复制标题
UWB 信道中使用 MIMO 自相关接收机的差分空时编码脉冲无线电系统
DOI：
10.1109/vtcf.2006.136
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发表时间：
2006
期刊：
影响因子：
--
通讯作者：
C. Ng
中科院分区：
文献类型：
--
作者：
Qi Zhang;C. Ng
采用自相关接收机的差分脉冲无线电是一种高效、低复杂度的短距离无线超宽带通信技术。然而，现有的系统是基于单个发射天线和单个接收天线的。为了提高系统容量，本文将该技术扩展到多输入多输出（MIMO）系统。所得到的系统是能够利用不仅多径分集，但也空间分集。该接收机继承了AcR的优点，既不包括本振也不包括AD/DA转换器。从理论性能分析和计算机仿真两方面都可以看出，采用2根发射天线和2根接收天线的系统比单输入单输出（SISO）系统有5 ~ 7 dB的性能增益。
Differential impulse radio employing autocorrelation receivers (AcR) is an efficient, low-complexity technology for short range wireless ultra wide-band (UWB) communications. However, existing systems are based on single transmit and single receive antennas. To enhance system capacity, this paper extends the technique to multiple-input multiple-output (MIMO) systems. The resulting system is capable of exploiting not only multipath diversity, but also the spatial diversity. The proposed receiver inherits the merits of the AcR, which include neither local oscillators nor AD/DA converters. From both theoretical performance analysis and computer simulations, it was observed that the system employing 2 transmit and 2 receive antennas has about 5 ~ 7dB performance gain over the single-input single- output (SISO) system.