signal fading

I introduce the frequency allocation between BCCH carrier frequency and TCH, signal fading arithmetic, interference theory and the adjusting thinking of dynamic power control. Also I introduce the method of the improving network quality and the cell login and the handover performance.

介绍了BCCH载波与TCH载波的频率配置、信号衰落算法、干扰原理、动态功率控制的调节思路，以及提高网络质量，改善小区登陆与切换性能的措施。

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OFDM as well as multi-channel-coding and multi-modulation is adopted by DRM. This combine with interleaving and error protection to decrease the effect of frequency selective fading, multi-path time delay and Doppler effect. Then the robustness of the signal transmitted is enhanced.

DRM采用OFDM调制方式和多级信道编码，使用交织、差错保护技术，大大地减轻了频率选择性衰落、多径时延以及多普勒效应的影响，提高了信号传输质量和稳定性。

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The results of analysis show that: the average probability of error for digital data communication in slow Rayleigh fading channel is less one half magnitude than the optimized threshold detection with fading signal at same mean SNR.

结果表明，在Rayleigh慢衰落信道上采用这种检测器，相对于工作此信道上的最佳固定门限检测器，在不同输入信噪比情况下，其平均误码率约有半个数量级的改善。

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Wireless signal propagated in the wireless channel will be affected by multi-path time delay spread, Doppler shift, angular spread and other characteristics of multi-path fading, leading to the received signal distortion in amplitude, phase and frequency.

无线信号在无线信道中传播，容易受到多径时延扩展、多普勒频移、角度扩展等多径衰落特性影响，导致接收信号在幅度、相位和频率上失真。

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Terminal movement causes channel fast fading, which makes channel estimation obsolete and influences receiver signal detection.

终端的移动会造成信道的快速时变，而使得信道的估计值产生偏差，因此影响对信号的估计。

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The results show that the FRM have a significant effect for the elimination of the polarization induced signal fading phenomenon. 3.

结果表明，FRM对于消除偏振诱导信号衰落现象有显著效果。

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