Nonuniform tap spacing in a GPS spherical adaptive array

Alix Rivera-Albino, Constantine Balanis

Research output: Contribution to journalArticlepeer-review

1 Scopus citations


This letter introduces a signal processing procedure that improves the performance of the basic Global Positioning System (GPS) receivers. The proposed signal process incorporates fixed nonuniform tap delays to a seven-element spherical array to mitigate the degrading impact of multipath propagation in satellite communications. Contrary to the time-consuming tap-delay-tracking algorithms, the proposed nonuniform tap delays do not increase the complexity of the signal processing when compared to those of the uniform spaced delays. Using standardized channel models, it is shown that, for a bit error rate (BER) of 10$ -3, the system can operate with 1-2 dB less signal-to-noise ratio (SNR) when an exponential distribution is used instead of the uniform.

Original languageEnglish (US)
Article number6237481
Pages (from-to)822-825
Number of pages4
JournalIEEE Antennas and Wireless Propagation Letters
StatePublished - 2012


  • Adaptive array
  • delay line
  • multipath channel
  • satellite navigation system

ASJC Scopus subject areas

  • Electrical and Electronic Engineering


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