Cramér‐Rao lower bound with Pd < 1 for target localisation accuracy in multistatic passive radar. Issue 7 (1st August 2014)

• Record Type: Journal Article
• Authors: Anastasio, Valeria; Farina, Alfonso; Colone, Fabiola; Lombardo, Pierfrancesco
• Is Part Of: IET radar, sonar & navigation. Volume 8:Issue 7(2014)
• Page Start: 767
• Page End: 775
• Publication Date: 2014-08-01
• Subjects: FM radar -- passive radar -- probability -- radar detection -- search radar; multistatic passive radar -- Cramer‐Rao lower bound -- CRLB -- target localisation accuracy -- false alarm rates -- detection capability -- detection probability -- surveillance area -- FM radio transmissions -- bistatic pair -- Doppler frequency measurements; Signal processing -- Periodicals; Radar -- Periodicals; Sonar -- Periodicals; Electronics in navigation -- Periodicals; Navigation -- Periodicals; 621.3848
• DOI: 10.1049/iet-rsn.2013.0213
• Languages: English
• ISSNs: 1751-8784

Abstract

Abstract : By exploiting the sources of opportunity not designed for radar applications, the passive radar system often operates with a P d in the range from 60 to 85% for acceptable false alarm rates. Multistatic radar networks can be used to both increase detection capability and localisation accuracy. The standard Cramér‐Rao lower bound (CRLB) cannot be used for a realistic assessment of the target localisation accuracy in a surveillance area since it provides optimistic predictions. In this study, the authors derive the CRLB with missing observations, namely for P d < 1, for the multisensory case. The results are illustrated for the case study of a multistatic passive radar exploiting FM radio transmissions where each bistatic pair within the network is assigned with a detection probability for each target position in the surveillance area. The obtained CRLB with P d < 1 is then employed to compare the localisation performance achievable by a multistatic passive radar when using different sets of measurements: (A) only range measurements, (B) range and Doppler frequency measurements and (C) Doppler frequency measurements only. The reported results show that the proposed CRLB with P d < 1 yields a more reliable prediction of the achievable performance thus allowing a fair comparison of the above different strategies for target localisation.