相位调制器对科斯塔斯环路性能的影响

IF 1.8 4区 计算机科学 Q3 TELECOMMUNICATIONS
F. Sinhababu, A. Mukherjee, S. Sarkar, B. Chatterjee, A. Sarkar
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引用次数: 0

摘要

在本研究中,借助数学建模和数值模拟,介绍了一种改进的科斯塔斯环路。压控振荡器的输出相位和频率由输入控制电压控制。改进后的环路作为频率解调器电路进行了测试,通过额外的相位控制安排,边带衰减效果明显改善。数字模拟结果也得出了类似的结论,即在不同相位控制比例下,三次谐波与一次谐波之比以及一次边带衰减与载波之比均有不同。研究了改进环路的噪声带宽和锁定范围,特别强调了这些参数对相位调制器增益的依赖性。对环路的锁定范围进行了分析评估。据报告,在附加相位控制的情况下,环路具有出色的解调能力。分析结果与提交的数值结果非常吻合。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Impact of phase modulator on the performance of Costas loop

Impact of phase modulator on the performance of Costas loop

 In the present work, a modified Costas loop is presented with the help of mathematical modeling and numerical simulation. The voltage-controlled oscillator output phase along with frequency is controlled using the input control voltage. The modified loop is tested as frequency demodulator circuit where the improvement in sideband attenuation is clearly visible using an additional phase control arrangement. Numerical simulation result leads to a similar conclusion when the ratio of third harmonic to first harmonic and the ratio of first sideband attenuation to carrier are obtained for different proportions of the phase control. Noise bandwidth and lock range of the modified loop are investigated with special emphasis on the dependence of these parameters on the phase modulator gain. Lock range of the loop is evaluated analytically. An excellent demodulation capability of the loop has been reported in the presence of the additional phase control. Analytical results coupled with numerical findings presented are in good agreement.

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来源期刊
Annals of Telecommunications
Annals of Telecommunications 工程技术-电信学
CiteScore
5.20
自引率
5.30%
发文量
37
审稿时长
4.5 months
期刊介绍: Annals of Telecommunications is an international journal publishing original peer-reviewed papers in the field of telecommunications. It covers all the essential branches of modern telecommunications, ranging from digital communications to communication networks and the internet, to software, protocols and services, uses and economics. This large spectrum of topics accounts for the rapid convergence through telecommunications of the underlying technologies in computers, communications, content management towards the emergence of the information and knowledge society. As a consequence, the Journal provides a medium for exchanging research results and technological achievements accomplished by the European and international scientific community from academia and industry.
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