Performance evaluation of MIMO-OFDM system based on time-switched transmit diversity
JIN Ji-yu, JIN Gui-yue, OU-YANG Xing, WANG Zhi-sen
School of Information Science and Engineering, Dalian Polytechnic University, Dalian 116034, China
Abstract:
In this paper, a time-switched space-time (TSST) coded orthogonal frequency division multiplexing (OFDM) scheme against the time-varying channels is proposed. In the TSST-OFDM scheme, it is equipped with four transmit antennas, but only double of them are used for coding in every time slot. It is shown that the signal to inter-antenna interference ratio is a function of Doppler frequency in time-varying channels for a given space-time code. The analyses and simulations results validate that the proposed scheme not only gets time-switched diversity and lower decoding complexity, but also suffers less time-varying impairments. Hence, it exhibits better performance than quasi-orthogonal space-time coded scheme.
Key words: MIMO OFDM time-switched transmit diversity space time coding, time-varying channel
DOI：10.11916/j.issn.1005-9113.2012.03.006
Clc Number:TN9295
Fund:
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Performance evaluation of MIMO-OFDM system based on time-switched transmit diversity
本站小编 哈尔滨工业大学/2019-10-23
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