基于分形的多径衰落信道估计
fractal based multipath fading channel estimation
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摘要: 该文研究了多径衰落的分形性质,提出了一种利用分形维数和小波重构来改进最小均方误差方法的新型多径衰落信道估计算法。该算法改进了衰落信道参数估计的准确度,并消除了判决方法的错误传递性。仿真结果表明该算法能较准确地估计出多径衰落信道的参数,显著提高快衰落条件下接收机的误码性能。
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关键词:
- 多径衰落; 信道估计; 分形; 小波重构
Abstract: This paper studies the fractal characteristics of multipath fading channels and proposes a novel algorithm for the channel estimation, which is basically an MMSE estimation algorithm modified by employing fractal dimension and wavelet reconstruction analyses. The algorithm can improve the estimation accuracy of multipath fading channel parameters and avoid the error propagation problem of conventional approaches. Simulation results show that the new algorithm can estimate the channel parameters more accurately compared to the MMSE method, and significantly improve the receiver bit error rate (BER) in the fast fading environment. -
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