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引用次数: 3
摘要
b .在TD-SCDMA系统中一般采用steiner信道估计算法。然而，由于背景噪声的影响，估计的通道脉冲响应与实际的通道脉冲响应在幅度和时延方面存在一定误差，导致系统性能下降。本文提出了一种门方法，该方法对B.Steiner估计算法的结果进行处理，从而降低噪声。仿真结果表明，改进后的CIRs更接近理想CIRs，有效地提高了系统性能。此外，该方法易于实现，无需增加系统的额外计算。
An improved channel estimation algorithm of TD-SCDMA system
B.Steiner channel estimation algorithm is generally adopted in TD-SCDMA system. However, because of the impact of background noise, there are some errors between the estimated channel impulses responses (CIRs) and the real ones in terms of amplitude and time-delay, leading to the system performance decreases. This paper proposed a gate method which processes the result of the B.Steiner estimation algorithm and thus decreases noises. The simulation results show that the improved CIRs are closer to the ideal ones and the system performance is effectively increased. Besides, this method is easily to be realized without adding any extra computations of system.
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