Measurement and analysis of ambiguity functions of passive radar transmissions

Griffiths, Hugh; Baker, CJ

doi:10.1109/radar.2005.1435844

Cited by 74 publications

(31 citation statements)

References 12 publications

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“…Considering that the carrier frequency of a UMTS base station if f C =2100 MHz, we have that the range resolution of the considered waveform is of 39 m and the velocity resolution is of almost 0.71 m/s. These results are in agreement with the empirical results showed in [Pet09], [Gri03] and [Gri05], where the authors measured and analyzed the AAF of a UMTS signal.…”

Section: J Vt J V H V H T H T E Dt Ft H T H T H V H V Esupporting

confidence: 91%

Waveform Diversity and Design for Interoperating Radar Systems

Greco¹

2013

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Public reporting burden for this collection of information is estimated to average 1 hour per response, including the time for reviewing instructions, searching existing data sources, gathering and maintaining the data needed, and completing and reviewing the collection of information. Send comments regarding this burden estimate or any other aspect of this collection of information, including suggestions for reducing the burden, to Department of Defense, Washington Headquarters Services, Directorate for Information Operations and Reports (0704-0188), 1215 Jefferson Davis Highway, Suite 1204, Arlington, VA 22202-4302. Respondents should be aware that notwithstanding any other provision of law, no person shall be subject to any penalty for failing to comply with a collection of information if it does not display a currently valid OMB control number. PLEASE DO NOT RETURN YOUR FORM TO THE ABOVE ADDRESS. REPORT DATE (DD-MM-YYYY)15 January 2013 (From -To) REPORT TYPE Final Report DATES COVERED SPONSORING/MONITORING AGENCY NAME(S) AND ADDRESS(ES)EOARD Unit 4515 BOX 14 APO AE 09421 SPONSOR/MONITOR'S ACRONYM(S)AFRL/AFOSR/IOE (EOARD) SPONSOR/MONITOR'S REPORT NUMBER(S) AFRL-AFOSR-UK-TR-2013-0003 DISTRIBUTION/AVAILABILITY STATEMENTApproved for public release; distribution is unlimited. SUPPLEMENTARY NOTESGovernment Purpose Rights -University Di Pisa ABSTRACTFor many years, conventional radars transmitted, received, and processed the same waveform on every pulse or burst within a coherent processing interval (CPI), independently of the environment. Now, modern radar systems have considerable flexibility in their modes of operation, both on receive and transmit. In particular, it is possible to modify the waveform on a pulse to pulse basis, and electronically steered phased arrays can quickly point the radar beam in any feasible direction. In the course of this research project, we introduced the Ambiguity Function, an analytical tool for waveform design and analysis that is useful for examining resolution, sidelobe behavior, and ambiguity in range and Doppler of a given signal waveform. Some techniques to design multiple access frequency hop codes with good auto and cross-ambiguity functions are characterized, focusing on the frequency hop patterns. We have shown that the performance of each channel of the multistatic system heavily depends on the transmitted waveform and on the geometry of the scenario, that is, the position of receivers and transmitters with respect to the position of the target. In particular, both geometry factors and transmitted waveforms play an important role in the shape of the Ambiguity Function and hence in the value of the Cramer-Rao Lower Bound (CRLB). We have calculated the bistatic CRLBs of target range and velocity of each transmit-receive pair as a function of the target kinematic parameters and to provide a local measure of the estimation accuracy of these parameters. Finally, in this work we have analyzed the problem of the optimum sensor selection along the trajectory of a tracked ta...

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Section: J Vt J V H V H T H T E Dt Ft H T H T H V H V Esupporting

confidence: 91%

Waveform Diversity and Design for Interoperating Radar Systems

Greco¹

2013

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“…It monitors the designated airspace, searches, detects and tracks the invaded targets. Fusion result is transmitted to the ground control center [12]. The control center makes quick decision based on the results received and takes a series of measures to the enemy targets.…”

Section: A Problem Descriptionmentioning

confidence: 99%

A Study on Search Strategies of Netted Surveillance Radar

Li¹,

Gao²,

Li³

2014

Proceedings of the International Conference on Logistics, Engineering, Management and Computer Science

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Abstract-Aiming at the netted radar surveillance problem, an intelligent search strategy is put forward. Firstly the target's probability values is given, by ESM pre-search the specified airspace surveillance, as the target distribution weights; Then based on the optimization criterion of maximizing the weighted probability of detection, the distribution function of radar-target is built and the algorithm is given; Finally, the feasibility of the method is verified through MATLAB simulation experiment. The content of this paper can provide theoretical guidance for the actual engineering application.

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“…In passive TMA, the receivers "listen" for the signal emitted by a target or exploit an "illuminator of opportunity" from a nearby transmitter station as their sources of signal transmission. A passive system offers significant advantages over its active counterpart such as capability to counter stealth technology, much less vulnerability to electronic countermeasures as it emits no radio energy, and lower cost in terms of system implementation and maintenance as no transmitter hardware is required [1,2]. In this paper, we focus on passive multistatic TMA in the two-dimensional plane where the position and velocity of a moving target with constant velocity are estimated using angle-of-arrival (AOA), time-difference-of-arrival (TDOA) and frequency-difference-of-arrival (FDOA) measurements obtained from spatially distributed stationary receivers.…”

Section: Introductionmentioning

confidence: 99%