Aliasing detection and resolving in the estimation of polynomial-phase signal parameters

被引:14
作者
Djukanovic, Slobodan [1 ]
Djurovic, Igor [1 ]
机构
[1] Univ Montenegro, Dept Elect Engn, Podgorica 20000, Montenegro
关键词
Polynomial-phase signal; Aliasing; High-order ambiguity function; ORDER AMBIGUITY FUNCTION; FREQUENCY; TRANSFORM;
D O I
10.1016/j.sigpro.2011.07.011
中图分类号
TM [电工技术]; TN [电子技术、通信技术];
学科分类号
0808 ; 0809 ;
摘要
A novel method for aliasing detection and resolving in the estimation of polynomial-phase signal (PPS) parameters is presented. Aliasing is detected using two high-order ambiguity functions (HAFs) of a uniformly sampled PPS embedded in noise. If aliasing occurred, we propose a way of recovering the true parameters from their aliased positions. To that end, a closed-form expression for the true parameter value is derived. As opposed to the concurrent methods, the proposed method provides much more robust results with higher order PPSs and does not require nonuniform sampling. In addition, it can be readily extended to the multicomponent PPS case. Simulations support the theoretical results. (C) 2011 Elsevier B.V. All rights reserved.
引用
收藏
页码:235 / 239
页数:5
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