| 摘要: |
| 本文结合正交频分复用(OFDM)、格形编码调制(TCM)与差分编码，提出一种使用子信道交织技术的差分TC—OFDM系统，并在此基础上将信道估计引入系统接收机，提出了与解码相联合的SEWRLS自适应信道估计方法。计算机仿真结果表明，本文提出的联合系统能有效地克服宽带无线通信中的多径衰落，并在快衰落环境中具有很强的抗信道干扰能力。 |
| 关键词: 正交频分复用 接收机 格形编码调制 信道估计 SEWRLS |
| DOI：10.3969/j.issn.1001-893X. |
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| 基金项目:国家自然科学基金资助项目(60072048) |
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| A Differential TC-OFDM System Combined with Adaptive Channel Estimation |
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| Abstract: |
| This paper proposes a differential TC-OFDM system using subchannel interleaving technique, which combines orthogonal frequency division multiplexing (OFDM), trellis coded modulation (TCM) and differential coding. Channel estimation is also applied to the receiver based on the proposed system, and an SEWRLS adaptive channel estimation scheme jointed decoder is presented. Computer simulation results show that the proposed system can combat the effect of multipath fading efficiently in wideband wireless communication, and it is robust to channel interference in fast fading environment. |
| Key words: OFDM,Receiver,TCM,Channel estimation,SEWRLS |
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