Performance comparison of differential space-time signalling schemes for OFDM systems
Performance comparison of differential space-time signalling schemes for OFDM systems
复制标题
OFDM 系统差分空时信令方案的性能比较
DOI：
10.1109/icon.2005.1635652
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发表时间：
2005
期刊：
影响因子：
--
通讯作者：
Ahmad Fadzil Ismail
中科院分区：
文献类型：
--
作者：
W. Hashim;F. Said;Brandon Allen;A. Aghvami;Ahmad Fadzil Ismail
差异传输多样性是其相干对应物的有吸引力的替代品，尤其是对于多个天线系统，与单个天线系统相比，通道估计更难以实现。在本文中，我们比较了基于OFDM的传输的两种不同类型的差异传输技术。第一种技术使用正交设计的差异时空块代码（DSTBC），第二个使用差分循环延迟多样性（DCDD）。结果比较了几种传输天线配置的位误差性能。结果表明，DCDD的性能非常接近DSTBC，具有简化的接收器结构。
Differential transmit diversity is an attractive alternative to its coherent counterpart, especially for multiple antenna systems where channel estimation is more difficult to attain compared to that of single antenna systems. In this paper we compare two different types of differential transmit diversity techniques for OFDM based transmissions. The first technique uses differential space-time block codes (DSTBC) from orthogonal designs and the second uses the differential cyclic delay diversity (DCDD). The results compare the bit error performance for several transmit antenna configurations. The results show that DCDD offers a very close performance to that of DSTBC, with the advantage of a simplified receiver structure.