Radar Waveform Optimization for Target Parameter Estimation in Cooperative Radar-Communications Systems

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Abstract

The coexistence between radar and communications systems has received considerable attention from the research community in the past years. In this paper, a radar waveform design method for target parameter estimation is proposed. Target time delay parameter is used as an example. The case where the two systems are not co-located is considered. Radar waveform optimization is performed using statistical criteria associated with estimation performance, namely Fisher Information (FI) and Cramer-Rao Bound (CRB). Expressions for FI and CRB are analytically derived. Optimization of waveforms is performed by imposing constraints on the total transmitted radar power, constraints on the interference caused to the communications system, as well as constraints on the Subcarrier Power Ratio (SPR) of the radar waveform. The frequency domain SPR is different than the Peak to Average Power Ratio (PAPR) which is computed in time domain. It is shown, using simulation results, that the proposed optimization strategies outperform other strategies in terms of estimation error. It is also shown that the SPR constraint reduces the delay domain ambiguities.

Details

Original languageEnglish
Pages (from-to)2314 - 2326
JournalIEEE Transactions on Aerospace and Electronic Systems
Volume55
Issue number5
Early online date2018
Publication statusPublished - Oct 2018
MoE publication typeA1 Journal article-refereed

    Research areas

  • spectrum sharing, coexistence, cooperation, multicarrier radar, communications systems, parameter estimation, agile radar, waveform optimization, power allocation

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