| 遥测接收机的一种载波频偏抑制方法 |
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| 引用本文： | 陈大海,张健,吕幼新.遥测接收机的一种载波频偏抑制方法[J].电子科技大学学报（自然科学版）,2008,37(5):720. |
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| 作者姓名： | 陈大海 张健 吕幼新 |
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| 作者单位： | 1.电子科技大学电子工程学院 成都 610054; |
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| 摘 要： | 讨论了一种PCM/FM遥测数字接收机的载波频偏抑制方法。理论推导证明,在全数字接收机条件下,载波频偏对于理想FM解调输出信号的影响相当于对其进行了幅度调制。因此基于滑窗最大最小值法对鉴频后的信号进行平均包络检测,再从中减去平均包络部分,从而得到频偏抑制后的信号。给出了设计实例和计算机仿真结果,误码率测试曲线表明该方法不但有效,而且能够适应较大的频偏变化率。
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| 关 键 词： | 载波频偏 数字接收机 PCM/FM 滑窗 |
| 收稿时间： | 2007-03-16 |
A New Scheme to Suppress Carrier Frequency Deviation for Telemetry Receiver |
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| CHEN Da-hai,ZHANG Jian,L You-xin.A New Scheme to Suppress Carrier Frequency Deviation for Telemetry Receiver[J].Journal of University of Electronic Science and Technology of China,2008,37(5):720. |
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| Authors: | CHEN Da-hai ZHANG Jian L You-xin |
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| Affiliation: | 1.School of Electronic Engineering,University of Electronic Science and Technology of China Chengdu 610054;2.Institute of Electronic Engineering,China Academy of Engineering Physics Mianyang Sichuan 621900 |
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| Abstract: | A new scheme to suppress carrier frequency deviation for PCM/FM telemetry digital receiver is presented. Theoretical deduction proves that under the condition of all digital receiver, the ideal FM demodulated signal is equivalent to a signal with amplitude modulated by the frequency deviation. From this theoretical result, we propose a new scheme to suppress the carrier frequency deviation. Design examples and computer simulation show the new scheme is effective and applicable for more higher frequency variable rate. |
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| Keywords: | PCM/FM |
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