Adaptive modulation can improve the system performance with high spectral efficiency.

自适应调制能提高系统的频谱利用率和改善系统的误码率性能。

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LTE system adopts MIMO and OFDM as its two most important fundamental techniques, so as to respond to the requirements of large capacity and high spectral efficiency.

LTE系统采用多输入多输出(MIMO)和正交频分复用(OFDM)作为两大主要技术以应对系统大容量与高频谱利用率等需求。

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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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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'