Title: Adaptive gain and variable effective aperture aided multi antenna set-ups for faded Rayleigh channels

Authors: Parismita A. Kashyap; Kandarpa Kumar Sarma

Addresses: Department of Electronics and Communication Engineering, Tezpur University, Tezpur-784028, Assam, India ' Department of Electronics and Communication Technology (ECT), Gauhati University (GU), Guwahati-781014, Assam, India

Abstract: In mobile communication, out of the many fading eliminating techniques, a less exploded technique is based on the physical parameter of the transmitter by varying the transmitter gain and hence the physical dimension of the transmitting antenna. This paper investigates a simple method to eliminate both flat and frequency-selective fading effects in a suburban and urban Rayleigh environment respectively, in different multi antenna set-ups by dynamically varying the signal-to-noise ratio (SNR), the transmitter gain (G) and the effective aperture (Ae) of the transmitting antenna. We consider here single input-single output (SISO), single input-multi output (SIMO), multi input-single output (MISO), and multi input-multi output (MIMO) multi antenna systems. The data stream before binary phase shift keying (BPSK) modulation is also encoded using Hamming coding which offers significant performance improvement. Performance of the system is analysed in terms of bit error rate (BER). Experimental results derived show that with adaptive gain and variable effective aperture the performance of a BPSK-based framework gives satisfactory performance despite the presence of Rayleigh channels.

Keywords: Rayleigh slow flat fading; Rayleigh slow frequency selective fading; Hamming codes; signal-to-noise ratio; SNR; transmitter gain; effective aperture; least mean squares; LMS; adaptive gain; variable effective aperture; multiple antenna setups; faded channels; mobile communications; bit error rate; BER; Rayleigh channels; binary phase shift keying; BPSK modulation.

DOI: 10.1504/IJICT.2014.063222

International Journal of Information and Communication Technology, 2014 Vol.6 No.3/4, pp.339 - 354

Received: 18 Mar 2013
Accepted: 05 Jul 2013
Published online: 26 Jul 2014 *

Full-text access for editors Full-text access for subscribers Purchase this article Comment on this article