Adaptive Beamformer using Nested Arrays and Multirate Techniques

Vrushali Golhar; Mrs. M.R. Vargantwar

doi:https://doi.org/10.14445/22315381/IJETT-V67I3P226

Research Article | Open Access | Download PDF

Volume 67 | Issue 3 | Year 2019 | Article Id. IJETT-V67I3P226 | DOI : https://doi.org/10.14445/22315381/IJETT-V67I3P226

Adaptive Beamformer using Nested Arrays and Multirate Techniques

Vrushali Golhar, Mrs. M.R. Vargantwar

Citation :

Vrushali Golhar, Mrs. M.R. Vargantwar, "Adaptive Beamformer using Nested Arrays and Multirate Techniques," International Journal of Engineering Trends and Technology (IJETT), vol. 67, no. 3, pp. 135-140, 2019. Crossref, https://doi.org/10.14445/22315381/IJETT-V67I3P226

Abstract

The linear adaptive antenna arrays are examined in this report which are used at the mobile station for a typical Direct Sequence Code Division Multiple Access (DS-CDMA) cellular mobile communications system. The primary objective is to reduce co-channel interference of a wideband CDMA cellular network under a multi-path fading environment. Performance analysis of a randomly positioned mobile terminal with a randomly orientated adaptive antenna array in the forward channel (base-station to mobile) of a multi-cell DS-CDMA system is done and four performance boundaries, viz. BER, PSNR, BEAMWIDTH and SLL are established. A broadband adaptive array beamformer is proposed using harmonic nesting arrays and multirate sampling techniques. An harmonic nesting microphone array is designed to have several uniform linear sub arrays, each covering an octave frequency band. An adaptive beamformer following each subarrays is then implemented using a Generalized Sidelobe Canceler (GSC) structure.

Keywords

Generalized Sidelobe Canceler, Adaptive Array, Nested Array, Multirate Sampling.

References

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