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A Variable step frequency-domain LMS narrowband interference suppression algorithm based on adaptive noise statistics

A variable step frequency-domain LMS narrowband interference...

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第九届中国卫星导航学术年会

作者： Yaohui Chen Dun Wang Hehe Guo Zhenxing Xu Peng Liu Dongjun Li Space Star Technology Co. Ltd

In the inter-satellite communication system,the power of spread spectrum signal received by the receiving end has a large dynamic range due to the large distance between the senders and receivers.In order to ensure the stability of AD sampling data,it usually adds AGC in the RF channel to make the output of the IF signal power stable,and does not change along with the change of the input signal power.It also leads to a problem that the proportion of the effective signal(the number of bits) after AD sampling reduced with the increase of the interference signal power,thus affecting the anti-jamming performance of the fixed-step frequency domain LMS algorithm.Aiming at the above problems,this paper proposes a Variable step frequency domain LMS narrowband interference suppression algorithm which based on adaptive noise statistics.In this paper,the simulation results show that the proposed approach can effectively solve the above problems.

关键词： Frequency domain LMS Adaptive Variable step AGC Anti-jamming

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A new Variable step size CMA blind equalization algorithm

A new variable step size CMA blind equalization algorithm

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第24届中国控制与决策会议

作者： Yuan Gao 1 , Xinyun Qiu 2 1. Department of Automation Northeastern University at Qinhuangdao, Qinhuangdao 066004, China2. Department of Automation Northeastern University at Qinhuangdao, Qinhuangdao 066004, China

A new Variable step size blind equalization algorithm based on a Variable step size blind equalization algorithm in which step size is controlled by auto correlative error signal pointing to problems lie in limiting constant step size blind equalization algorithm, which momentum term is introduced and momentum term weighted parameter is adjusted by step size. The new algorithm which has a fast convergence and higher stability can equalize the channel better by theoretical analysis and simulations.

关键词： Equalizer Blind Equalization Algorithm CMA algorithm Variable step Momentum

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Research on Curing Monitoring System of a Variable step Adaptive Algorithm of the CAN Bus

Research on Curing Monitoring System of a Variable Step Adap...

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2009中国控制与决策会议

作者： TIAN Shu,WANG Xiaowei,WANG Juanjuan Institute of Electrical Engineering and Automation Henan Polytechnic University Jiaozuo City,Henan Province,China

Traditional monitoring system of curing machines can hardly meet controlling requirement not only because it is interfered easily by the hostile environment of locale in the respect of data acquisition,but also it has a low processing speed of data and weak communication ability.This study establishes a CAN bus monitoring network which can fully utilize the powerful digital signal processing ability of DSP,and adopts a new sort of Variable step LMS adaptive filtering algorithm.The algorithm resolves better the contradiction between filtering speed and precision,and then improves the accuracy of data acquisition and the real-time data processing through controlling step-size factor.Furthermore,it optimizes the performance of the filter.The CAN bus network achieve effectively the real-time sharing and monitoring of data,besides,because of the open structure,the study also supplies a foresighted thought for the later construction and capacity expansion of the system.

关键词： Monitoring system DSP Adaptive algorithm CAN bus Variable step LMS

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A Novel Acquisition Tracking Algorithm for SATCOM On-The-Move

A Novel Acquisition Tracking Algorithm for SATCOM On-The-Mov...

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第二十九届中国控制会议

作者： HAO Luyao 1,ZHANG Ouya 2 1.The 602 Staff Room of the Second Artillery Engineering Institute,Xi''an 710025,P.R.China2.The 901 Staff Room of the Second Artillery Engineering Institute,Xi''an 710025,P.R.China

In order to improve SOTM’s performance and solve the contradiction between the initial acquisition speed and the tracking accuracy of traditional algorithm for SOTM,a new initial acquisition and tracking algorithm based on Variable step size was proposed.This algorithm can result in bigger step size in initial acquisition and re-acquisition stage and smaller step size in tracking stage.The simulation results confirm the theoretical analysis and show that this proposed scheme can keep lower computational complexity,with faster initial acquisition speed and higher tracking accuracy.

关键词： SATCOM On-The-Move（SOTM） Variable step SizeInitial Acquisition Tracking Algorithm

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