Performance analysis of dual-frequency CW radars for motion detection and ranging in urban sensing applications

被引：6

作者：

Ahmad, Fauzia ^{[1
]}

Amin, Moeness G. ^{[1
]}

Zemany, Paul D. ^{[2
]}

机构：

[1] Villanova Univ, Ctr Adv Commun, Radar Imaging Lab, 800 Lancaster Ave, Villanova, PA 19085 USA

[2] BAE Syst, Adv Syst & Technol, Nashua, NH 03060 USA

来源：

RADAR SENSOR TECHNOLOGY XI | 2007年 / 6547卷

关键词：

through-the-wall; Doppler radar; dual frequency; moving targets; urban sensing;

D O I：

10.1117/12.719856

中图分类号：

TP7 [遥感技术];

学科分类号：

081102 ; 0816 ; 081602 ; 083002 ; 1404 ;

摘要：

Single frequency (Doppler) radars cannot be used in target range estimation due to the associated large range ambiguities. An additional frequency can be used to increase the maximum unambiguous range to values adequate for range estimation of moving targets within buildings and enclosed structures. The dual-frequency technique uses phase comparison of the transmitted and received CW signals to provide an estimate of the target range. It offers the benefit of reduced complexity, fast computation, and real time target tracking. However, the dual-frequency approach for range estimation can be compromised due to the presence of drift in frequency, I/Q mismatch, and noise. In this paper, we analyze the effect of I/Q mismatch and noise on the bias and variance of the target range estimate. We consider targets with both linear and simple harmonic motions. Computer simulations are provided for illustrating the performance as a function of signal-to-noise ratio.

引用

页数：8

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