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Performance Analysis of MIMO STBC in A High Altitude Platforms Communications Channel

Authors:
Iskandar Iskandar
Albaz Rosada

Keywords: HAPs; MIMO; STBC; Ricean channel; K factor; Spatial Multiplexing

Abstract:
MIMO system recently emerged as a solution for the provision of wireless communications to improve capacity and decrease bit error rate. One of MIMO variant, which is used in this paper, is Space Time Block Code (STBC). STBC allows diversity gain using combination of spatial and time dimension without changing its bandwidth requirements. This paper presents an implementation of MIMO STBC 2x1 and 2x2 on HAPS channel with the assumption that the channel state condition is known at the receiver (perfect CSIR). HAPS channel characteristic is known to follow Ricean distribution in which it depends on its K factor. In case of HAPs, K factor also depends on its elevation angle. Using computer simulation, this paper analyzes HAPs channel performance using MIMO STBC 2x1 and 2x2 on the various of elevation angles. It is shown that MIMO STBC 2x1 and 2x2 are able to increase performance of HAPs channel including HAPs channel at low elevation angle. However from our simulation capacity improvement of MIMO STBC is obtained insignificant, therefore we propose MIMO spatial multiplexing, which is another variant of MIMO to obtain more capacity.

Pages: 355 to 359

Copyright: Copyright (c) IARIA, 2012

Publication date: June 24, 2012

Published in: conference

ISSN: 2308-4219

ISBN: 978-1-61208-203-5

Location: Venice, Italy

Dates: from June 24, 2012 to June 29, 2012