The spectrum efficiency of VBLAST system is very high, but performance of VBLAST very poor.

垂直分层空时编码)系统具有很高的频谱效率, 但是误码性能一般.

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Orthogonal Frequency Division Multiplexing ( OFDM ) has high spectrum efficiency and side - effect of multipath propagation.

正交频分复用 ( OFDM ) 技术由于具有较高的频谱效率,而且可以有效地对抗多径传输,已成为高速数据传输的关键技术.

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Theoretic analysis and numerical calculation show that adaptive modulation will improve the spectral efficiency.

理论分析和数值计算结果表明,自适应调制提高了系统的频谱效率.

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FQPSK is a modulation technique that fits for high spectrum efficiency and high power efficiency request.

FQPSK是 针对高频谱效率和高功率效率要求产生的一种调制方式.

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