The power amplifier (12) has a fixed gain mode and a variable gain mode used for the two modulation formats, respectively.
功率放大器（12）具有分别用于这两 种调制格式的固定增益模式和可变增益模式。
With the increasing number of modulation formats and the increasing similarity of the induced marginal distributions to a Gaussian channel, the problem is becoming more and more challenging.
随着现代通信系统中采用的调制模式不断增多和高斯信道感应边缘分布的相似性不断增加，该课题的研究越来越具有挑战性。
With the increasing number of modulation formats and the increasing similarity of the induced marginal distributions to a Gaussian channel, the problem is becoming more and more challenging.
随着现代通信系统中采用的调制模式不断增多和高斯信道感应边缘分布的相似性不断增加，该课题的研究越来越具有挑战性。
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