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所属单位：电子信息工程学院
发表刊物：IEEE TRANSACTIONS ON VEHICULAR TECHNOLOGY
关键字：Arbitrary number antenna selection estimation error feedback delay diversity Nakagami channel space-time block coding
摘要：Aunified error analysis of multi-antenna systems with orthogonal space-time block coding (OSTBC) using transmit antenna selection (TAS) over Nakagami-m channels in the presence of feedback delay and channel estimation error is presented, where the number of transmit antennas is arbitrarily selected. For imperfect channel state information (CSI), the Nakagami-m channel is modeled as the sum of Nakagami-(m) over cap channel and independent Gaussian channel error. By this model, accurate and closed-form approximate bit error rate (BER) expressions of TAS-OSTBC for M-ary quadrature amplitude modulation and M-ary phase-shift keying are derived by using the moment generating function of received SNR. With the approximate BER formula, the number of antennas to be selected for transmission can be adapted by minimizing the BER of the system with imperfect CSI. The diversity and coding gains of TAS-OSTBC with K receive antennas and M antennas selected from N transmit antennas for transmission are analyzed at high SNR. For noninteger m K, the upper and lower bounds of the diversity gain for different CSI and estimation error scenarios are derived. But for integer m K, the results indicate that the upper and lower bounds are equal achieving the full diversity order of m K N for perfect CSI, zero diversity order and partial diversity order of m M K for estimation error variance being fixed and being a decreasing function of average SNR, respectively. The coding gain is affected by M, N, K, Nakagami parameter m, code rate, modulation, and channel correlation coefficients. Simulation results verify the validity of the theoretical
ISSN号：0018-9545
是否译文：否
发表时间：2018-01-01
合写作者：Xu, Weiye,Leung, Shu-Hung,Wang, Jiang
通讯作者：虞湘宾