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ThinkMind // SPACOMM 2015, The Seventh International Conference on Advances in Satellite and Space Communications // View article spacomm_2015_3_40_20085


Interference Study in a Proposed Integrated Multi-beam Active Phased Antenna Array Transmission System for Satellite Communications

Authors:
Mohamed Atta Abdelaziz Aboelazm
Victor Ivanovich Nefedov

Keywords: Keywords- SSP;, IM; DSP; DPD; LMS; RLS; IBO.

Abstract:
Abstract— In this paper, an integrated active phased array multi-beam antenna system model including a nonlinear model of the amplifier and a digital pre-distortion linearizer is introduced and validated by simulation. To investigate nonlinearity effects in a phased-array antenna, a two-beam, three-beam, and five-beam S-band arrays are simulated and the results of the proposed system model are analyzed. The presented model is able to precisely predict the inter-modulation products with an accuracy of 1 dB in power with small fraction of a degree in direction. The effect of integrating a digital pre-distortion linearizer is to enhance the efficiency of antenna array transmission power amplifiers. Therefore, the model can be used as a tool to accurately predict the inter-modulation patterns for multi-beam satellite array applications, avoiding excessive system margin and reducing DC power consumption.

Pages: 70 to 75

Copyright: Copyright (c) IARIA, 2015

Publication date: April 19, 2015

Published in: conference

ISSN: 2308-4480

ISBN: 978-1-61208-397-1

Location: Barcelona, Spain

Dates: from April 19, 2015 to April 24, 2015

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