Improvement of a sample clock offset estimation method used in passive radar
Files
Date
2022
Authors
Searle, S.
Dogancay, K.
Editors
Advisors
Journal Title
Journal ISSN
Volume Title
Type:
Journal article
Citation
IEEE Transactions on Aerospace and Electronic Systems, 2022; 58(4):3678-3685
Statement of Responsibility
Conference Name
Abstract
Sample clock offset must be estimated in order to correctly demodulate an OFDM signal. Estimates are also required in passive radar processing, to produce a reference signal, which is properly matched to the transmission. A recently proposed clock offset estimation method for passive radar is found to be overly sensitive to measurement noise. However, the radar ambiguity surface is found to be unaffected by the specific errors engendered by this noise. The reasons for this are explored. An updated method based on state-space modeling and Kalman smoothing is proposed. This is found to restore clock offset estimation performance in cases of higher noise, achieving this with low processing latency. These improvements enable the method to be employed for other applications requiring high quality, time-critical clock offset estimation.
School/Discipline
Dissertation Note
Provenance
Description
Access Status
Rights
Copyright 2022 IEEE
Access Condition Notes: Accepted manuscript is available open access