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RESEARCH ON MOTION COMPENSATION FOR HIGH RESOLUTION PROFILE OF EXTENDED TARGET FOR STEPPED CHIRP RADAR AND dsp implementation

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Journal of Electronics(China) 2007年第2期24卷 191-198页

作者： Jiang Bin He Xiang Wang Hongqiang Guo Guirong ATR National Key Lab National University of Dcfcnse Technology Changsha 410073 China Beijing Univcrsity of Posts and Telccommunications Beijing 100876 China

A discrete model is set up for High Resolution Range Profile (HRRP) of an extended target and the model of echo from an extended target for a Stepped Chirp Radar (SCR) is proposed. The effect of target motion on a range profile is thoroughly analyzed, and based on which precision re- quirement is developed for motion compensation. By studying the time domain correlation and the rule based on the least burst error, a motion compensation algorithm which satisfies the project requirement is presented, and the cyber-emulation confirms the conclusion. At last the processor is designed by using dsp devices to realize motion compensation and target recognition.

关键词： Stepped chirp radar High Range Resolution Profile (HRRP) Motion compensation The least burst error rule dsp implementation

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Distributed Intelligent Video Analysis System Based on dsp and Its Algorithm

Distributed Intelligent Video Analysis System Based on DSP a...

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2008年中国高校通信类院系学术研讨会

作者： Chengwu Liang,Qing Guan School of Communication and Information Engnieering,University of Electronic Science and Technology of China(UESTC),Chengdu,Sichuan,610054

＜正＞This paper aims to realize a distributed intelligent video analysis system based on TI dsp chip *** new system we proposed in this paper provides users with fast,precise and smart video analysis *** system collects real time field data via analog cameras and IP cameras based on Network or Wireless *** image data then is transmitted to embedded high speed dsp real-time image processing board,where target,including person,object and vehicle,is extracted from background and compared with prescribed *** can freely set virtual alarm line,alarm region and violation behaviors through rule setting *** chip DM642 then analyze video images timely,and detect *** segmentation, feature abstraction,alarm and automatic tracking of multi-channel and multi-camera are implemented at the same time in this system. This system can be applied in many areas,for example,security *** it has great potential in applications with very high commercial values.

关键词： Intelligent Video Analysis Target Detection Target Segmentation Feature Extraction Target Tracking dsp implementation

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Practical Considerations for Implementing Adaptive Acoustic Noise Cancellation in Commercial Earbuds

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Journal of Electronic & Information Systems 2023年第2期5卷 25-34页

作者： Agustinus Oey VizWave Inc. Seongnam13595Korea

Active noise cancellation has become a prominent feature in contemporary in-ear personal audio ***,due to constraints related to component arrangement,power consumption,and manufacturing costs,most commercial products utilize fixed-type controller systems as the basis for their active noise control *** systems offer robust performance and a straightforward structure,which is achievable with cost-effective digital signal ***,a major drawback of fixed-type controllers is their inability to adapt to changes in acoustic transfer paths,such as variations in earpiece fitting ***,adaptive-type active noise control systems that employ adaptive digital filters are considered as the *** address the increasing system complexity,design concepts and implementation strategies are discussed with respect to actual hardware *** illustrate these considerations,a case study showcasing the implementation of a filtered-x least mean square-based active noise control algorithm is presented.A commercial evaluation board accommodating a low-cost,fixed-point digital signal processor is used to simplify operation and provide programming *** earbuds are obtained from a commercial product designed for noise *** study underscores the importance of addressing hardware constraints when implementing adaptive active noise cancellation,providing valuable insights for real-world applications.

关键词： Active noise cancellation Adaptive filter dsp implementation

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