Title :
Synchronization Probabilities using Conventional and MVDR Beam Forming with DOA Errors
Author :
Puska, Henri ; SAARNISAARI, Harri ; Iinatti, Jari ; Lilja, Pekka
Author_Institution :
Univ. of Oulu, Oulu
Abstract :
In this paper, code synchronization probabilities of the direct sequence spread spectrum (DS/SS) system are investigated when the receiver utilizes an adaptive antenna array. Performance studies of three beam forming algorithms in the presence of direction-of-arrival (DOA) errors are presented. The investigated algorithms are the conventional, the minimum variance distortionless response (MVDR), and the MVDR+ADL where the MVDR algorithm is enhanced against DOA error via the adaptive diagonal loading (ADL). The paper includes a large number of analytical and simulation results where the effects of DOA errors are investigated. It can be concluded that the MVDR beam former is more sensitive to DOA errors than the conventional beam former, especially, at large DOA errors and high signal-to-noise-ratio (SNR) values. However, this sensitivity can be reduced notably by using the ADL.
Keywords :
adaptive antenna arrays; direction-of-arrival estimation; spread spectrum communication; synchronisation; DOA errors; MVDR beam forming; adaptive antenna array; adaptive diagonal loading; direct sequence spread spectrum system; direction-of-arrival errors; minimum variance distortionless response; signal-to-noise-ratio values; synchronization probabilities; AWGN; Adaptive arrays; Antenna arrays; Direction of arrival estimation; Land mobile radio; Phased arrays; Receiving antennas; Robustness; Signal to noise ratio; Spread spectrum communication;
Conference_Titel :
Personal, Indoor and Mobile Radio Communications, 2007. PIMRC 2007. IEEE 18th International Symposium on
Conference_Location :
Athens
Print_ISBN :
978-1-4244-1144-3
Electronic_ISBN :
978-1-4244-1144-3
DOI :
10.1109/PIMRC.2007.4394599
