Comparison of the estimation performance of coherent and non-coherent ambiguity functions for an ultrawideband multi-input-multi-output noise radar

Research output: Contribution to journalArticle

9 Citations (Scopus)

Abstract

The authors start by analysing the mean square error (MSE) of target velocity and location estimation in ultrawideband (UWB) multi-input-multi-output (MIMO) noise radar. In the authors' system architecture, transmit antennas are illuminated by UWB-independent noise waveforms to meet the requirement of MIMO spatial diversity. The ambiguity function (AF) formulation is applied to implement the estimations. Since the maximum value of the AF is attained when the time-delay and Doppler stretch of replica signals are exactly matched with the ones corresponding to the reflections, this estimation is also a peak localisation problem. When noise is added, the peak may be located in a different place causing error. In this study, the authors formulate probability density functions (pdfs) to approximate the distributions of coherent and non-coherent ambiguity functions (CAFs and NCAFs) that are then applied to analyse MSE of their estimates. The pdfs are also applied to analyse the detection performance based on different AF approaches. Based on the analyses, the authors demonstrate that the NCAF-based estimation is a better approach in spatial diversity MIMO radars.

Original languageEnglish (US)
Pages (from-to)49-59
Number of pages11
JournalIET Radar, Sonar and Navigation
Volume6
Issue number1
DOIs
StatePublished - Jan 1 2012

Fingerprint

Spurious signal noise
Ultra-wideband (UWB)
Mean square error
Probability density function
Time delay
Antennas

All Science Journal Classification (ASJC) codes

  • Electrical and Electronic Engineering

Cite this

@article{e8c3bb9fa4d24c9dae6043f56288b706,
title = "Comparison of the estimation performance of coherent and non-coherent ambiguity functions for an ultrawideband multi-input-multi-output noise radar",
abstract = "The authors start by analysing the mean square error (MSE) of target velocity and location estimation in ultrawideband (UWB) multi-input-multi-output (MIMO) noise radar. In the authors' system architecture, transmit antennas are illuminated by UWB-independent noise waveforms to meet the requirement of MIMO spatial diversity. The ambiguity function (AF) formulation is applied to implement the estimations. Since the maximum value of the AF is attained when the time-delay and Doppler stretch of replica signals are exactly matched with the ones corresponding to the reflections, this estimation is also a peak localisation problem. When noise is added, the peak may be located in a different place causing error. In this study, the authors formulate probability density functions (pdfs) to approximate the distributions of coherent and non-coherent ambiguity functions (CAFs and NCAFs) that are then applied to analyse MSE of their estimates. The pdfs are also applied to analyse the detection performance based on different AF approaches. Based on the analyses, the authors demonstrate that the NCAF-based estimation is a better approach in spatial diversity MIMO radars.",
author = "Chen, {W. J.} and Narayanan, {Ram Mohan}",
year = "2012",
month = "1",
day = "1",
doi = "10.1049/iet-rsn.2010.0233",
language = "English (US)",
volume = "6",
pages = "49--59",
journal = "IET Radar, Sonar and Navigation",
issn = "1751-8784",
publisher = "Institution of Engineering and Technology",
number = "1",

}

TY - JOUR

T1 - Comparison of the estimation performance of coherent and non-coherent ambiguity functions for an ultrawideband multi-input-multi-output noise radar

AU - Chen, W. J.

AU - Narayanan, Ram Mohan

PY - 2012/1/1

Y1 - 2012/1/1

N2 - The authors start by analysing the mean square error (MSE) of target velocity and location estimation in ultrawideband (UWB) multi-input-multi-output (MIMO) noise radar. In the authors' system architecture, transmit antennas are illuminated by UWB-independent noise waveforms to meet the requirement of MIMO spatial diversity. The ambiguity function (AF) formulation is applied to implement the estimations. Since the maximum value of the AF is attained when the time-delay and Doppler stretch of replica signals are exactly matched with the ones corresponding to the reflections, this estimation is also a peak localisation problem. When noise is added, the peak may be located in a different place causing error. In this study, the authors formulate probability density functions (pdfs) to approximate the distributions of coherent and non-coherent ambiguity functions (CAFs and NCAFs) that are then applied to analyse MSE of their estimates. The pdfs are also applied to analyse the detection performance based on different AF approaches. Based on the analyses, the authors demonstrate that the NCAF-based estimation is a better approach in spatial diversity MIMO radars.

AB - The authors start by analysing the mean square error (MSE) of target velocity and location estimation in ultrawideband (UWB) multi-input-multi-output (MIMO) noise radar. In the authors' system architecture, transmit antennas are illuminated by UWB-independent noise waveforms to meet the requirement of MIMO spatial diversity. The ambiguity function (AF) formulation is applied to implement the estimations. Since the maximum value of the AF is attained when the time-delay and Doppler stretch of replica signals are exactly matched with the ones corresponding to the reflections, this estimation is also a peak localisation problem. When noise is added, the peak may be located in a different place causing error. In this study, the authors formulate probability density functions (pdfs) to approximate the distributions of coherent and non-coherent ambiguity functions (CAFs and NCAFs) that are then applied to analyse MSE of their estimates. The pdfs are also applied to analyse the detection performance based on different AF approaches. Based on the analyses, the authors demonstrate that the NCAF-based estimation is a better approach in spatial diversity MIMO radars.

UR - http://www.scopus.com/inward/record.url?scp=84863158757&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84863158757&partnerID=8YFLogxK

U2 - 10.1049/iet-rsn.2010.0233

DO - 10.1049/iet-rsn.2010.0233

M3 - Article

VL - 6

SP - 49

EP - 59

JO - IET Radar, Sonar and Navigation

JF - IET Radar, Sonar and Navigation

SN - 1751-8784

IS - 1

ER -