Simulation results show that the system can get satisfactory image communication performance in the very high spectral efficiency situation over the flat fading channel.

仿真结果表明，在慢衰落无线信道图像传输中，系统能获得满意的图像传输质量和很高的频谱利用率。

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The measure technology of multi-channel nuclear energy spectral is the basis of matter composition analysis and radioactivity detection by way of nuclear analysis method.

多道核能谱测量技术是用核分析方法进行物质成分分析和放射性检测的基础。

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At the same time, the channel estimation error, caused by the spectral leakage of DFT, can be reduced by canceling the auto-correlation error of the time-domain sequence of frequency-domain pilots.

同时，通过消除频域导频时域序列的自相关误差，能有效降低由DFT谱泄漏导致的信道估计误差。

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Riding on cutting-edge technologies such as flex oDSP, super SD-FEC, and flex modulation format, this field trial achieved a record-breaking transmission distance of 1, 500 km using a super-channel PDM-16QAM-based high spectral efficiency solution, and a second record-breaking transmission distance of 3, 325 km using a super-channel Nyquist PDM-QPSK-based ultra-long-haul solution.

ENGADGET: Huawei tests 2Tbps data transmission over Vodafone's German network, calls it a 'first'