Multicarrier DS-SS for GPS Pseudolites: Code-Acquisition Performance in the Presence of Data Modulation

Kumar, Shankar KR and Chockalingam, A (2002) Multicarrier DS-SS for GPS Pseudolites: Code-Acquisition Performance in the Presence of Data Modulation. In: 2002 IEEE 56th Vehicular Technology Conference VTC 2002-Fall, 24-28 September, Vancouver,Canada, Vol.1, 146-150.

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Abstract

In this paper we analyze the code acquisition performance of a multicarrier direct-sequence spread spectrum (DS-SS) system in the presence of data modulation (i.e., no pilot) on multipath Rayleigh fading channels. The motivation of this analysis arises from the possibility of beneficially using multicarrier DS-SS in Global Positioning System (GPS) pseudolites, where an unmodulated pilot is not available. Pseudolites are small, ground-based transmitters that emulate the signal structure of the GPS satellite transmitters, with the intention of augmenting the system performance. We consider equal gain combining (EGC) and selection combining (SC) of subcarrier correlator outputs for each timing hypothesis. We evaluate the probability of incorrect decision and mean acquisition time performance of the multicarrier DS-SS code acquisition scheme. We show that significant reduction in the mean acquisition time (MAT) can be achieved using the multicarrier DS-SS approach for GPS pseudolites.

Item Type:	Conference Paper
Publisher:	IEEE
Additional Information:	Copyright 1990 IEEE. Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the IEEE.
Keywords:	Multicarrier system;DS-SS;Code acquisition;GPS pseudolites
Department/Centre:	Division of Electrical Sciences > Electrical Communication Engineering
Date Deposited:	27 Jan 2006
Last Modified:	30 Jun 2011 12:10
URI:	http://eprints.iisc.ac.in/id/eprint/5231

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