Doppler-only tracking in GSM-based passive radar

A passive radar is a radar which uses external noncooperating transmitters (e.g. FM radio or GSM) to illuminate the target. Typical passive radar receiver benefits from its long integration time with a good velocity (Doppler frequency) estimation accuracy, while - especially for a GSM-based radar - the range measurement accuracy may be poor. This paper presents a study of Doppler-only tracking idea, where the strength of a passive radar velocity measurement is exploited. Moreover, Doppler-only localization is also presented. Tracking system simulations are shown as a proof-of-concept, where a significant improvement of tracking accuracy was achieved.