光通信研究Issue(6):42-45,4.
基于双路正交实现数字锁定放大器的方法
Dual way reference signal-based detection of digital LIA weak signals
摘要
Abstract
This paper introduces the detection of the weak sinusoidal signals of Lock-in Amplifiers (LIA)by using In-phase Quadrature (IQ)dual-way reference signals.It first uses the atom pairs of the atomic reservoir as the reference signals by sparse decomposition and searches for the optimal atom pair by using the Matching Pursuit (MP)algorithm.Then,it decides the best phase angle from this atom pair and thus synthesizes the optimal atom.From this optimum atom it obtains estimated useful input signals and detects the sine signals in the input signals.Compared with the single way digital LIA,this approach is better in computational efficiency as the computation speed is doubled and inherits the advantages of the former.关键词
微弱信号检测/锁定放大器/稀疏分解/匹配追踪算法Key words
weak signal detection/LIA/sparse decomposition/MP algorithm分类
信息技术与安全科学引用本文复制引用
杨超三,张天骐,潘毅,邓灵..基于双路正交实现数字锁定放大器的方法[J].光通信研究,2013,(6):42-45,4.基金项目
国家自然科学基金资助项目(61071196,61102131) (61071196,61102131)
教育部新世纪优秀人才支持计划资助项目(NCET-10-0927) (NCET-10-0927)
信号与信息处理重庆市市级重点实验室建设项目(CSTC2009CA2003) (CSTC2009CA2003)
重庆市杰出青年基金资助项目(CSTC2011jjjq40002) (CSTC2011jjjq40002)
重庆市自然科学基金资助项目(CSTC2010BB2398,CSTC2010BB2409,CSTC2010BB2411,CSTC2012JJA40008) (CSTC2010BB2398,CSTC2010BB2409,CSTC2010BB2411,CSTC2012JJA40008)
重庆市教育委员会科研项目(KJ120525) (KJ120525)