| Author Name | Affiliation | | JIN Ji-yu | School of Information Science and Engineering, Dalian Polytechnic University, Dalian 116034, China | | JIN Gui-yue | School of Information Science and Engineering, Dalian Polytechnic University, Dalian 116034, China | | OU-YANG Xing | School of Information Science and Engineering, Dalian Polytechnic University, Dalian 116034, China | | WANG Zhi-sen | School of Information Science and Engineering, Dalian Polytechnic University, Dalian 116034, China |
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| 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: |
