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自适应非线性射频对消

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摘要 受航空平台尺寸的影响,机载天线孔径间的隔离度受限,大功率的发射泄露可能会导致接收机指标恶化,甚至造成接收功能的失效。本文提出了一种有源射频对消方法,该方法在数字域构建一个自适应非线性滤波器模型,模型的输入为已知的发射基带信号。非线性滤波器模型可以精确表征功率放大器的非线性和宽带激励下的记忆特性以及无线信道的衰落特征,从而提高射频对消的性能。仿真结果表明,该方法可以在低噪声放大器输入端对发射泄露提供39.2dB的额外抑制。
作者 荀海恩
出处 《电子制作》 2022年第11期39-42,共4页 Practical Electronics
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