Estimation of receiver frequency error in a TDOA-based direction-finding system
2004 (English)In: Conference Record - Asilomar Conference on Signals, Systems and Computers, 2004, Vol. 2, 2079-2083 p.Conference paper (Refereed)
Direction-finding of radio transmitters is considered and in particular correlation-based time-difference-of-arrival (TDOA) estimation between a pair of intercept receivers. In the target application, the received and down-converted signals are corrupted by a frequency error due to a receiver frequency tuning offset which degrades the performance of the TDOA estimation. Traditionally, the cross-ambiguity function (CAP) is used in a 2D scheme for joint TDOA and frequency error estimation. In this paper, sequential ID frequency error and TDOA estimators are introduced and compared to the 2D method. The 2D method attains the CRLB for both the TDOA and frequency error estimates, but have high computational and memory complexity. The proposed frequency error estimator is outperformed by the 2D method. However, the main objective is to estimate the TDOA and the proposed TDOA estimator have a performance similar to that of the 2D method. The main advantage of the proposed method is a reduction in both computational and memory complexity.
Place, publisher, year, edition, pages
2004. Vol. 2, 2079-2083 p.
Bandpass filters, Computational complexity, Degradation, Error detection, Functions, Parameter estimation, Radio direction finding systems, Digital convertors, Frequency errors, Memory complexity, Receiver frequency, Transmitters
Electrical Engineering, Electronic Engineering, Information Engineering
IdentifiersURN: urn:nbn:se:kth:diva-35675ScopusID: 2-s2.0-21644435754OAI: oai:DiVA.org:kth-35675DiVA: diva2:429188
Conference Record of the Thirty-Eighth Asilomar Conference on Signals, Systems and Computers. Pacific Grove, CA. 7 November 2004 through 10 November 2004
QC 201107042011-07-042011-07-042011-11-21Bibliographically approved