Sum of Ratios of Complex Gaussian RVs and Its Application to a Simple OFDM Relay Network

Author

Sánchez-Sánchez, Juan J. ; Fernández-Plazaola, Unai ; Aguayo-Torres, M.C.

Author_Institution

Dept. de Ing. de Comun., Univ. de Malaga, Málaga, Spain

fYear

2010

fDate

16-19 May 2010

Firstpage

1

Lastpage

5

Abstract

The sum of ratios of two complex Gaussian random variables appears frequently in the mathematical analysis of telecommunication systems when zero-forcing equalization is applied. This paper is focused on the study of one of those systems: a simple Orthogonal Frequency Division Multiplexing (OFDM) relay network. The reason behind the election of this particular scenario is the recent interest on employing relay networks in wireless and mobile broadband systems to increase the coverage and throughput in a cost-effective way. Thus, the probability distribution of enhanced noise, made up by the sum of ratios of complex Gaussian random variables, is used to obtain a closed-form expression for the BER in the scenario under study.

Keywords

OFDM modulation; Rayleigh channels; error statistics; BER; Gaussian random variables; OFDM relay network; Rayleigh fading channels; complex Gaussian random variables; mobile broadband systems; orthogonal frequency division multiplexing; probability distribution; telecommunication systems; zero-forcing equalization; Closed-form solution; Gaussian noise; Mathematical analysis; Nominations and elections; OFDM; Probability distribution; Random variables; Relays; Signal to noise ratio; Throughput;

fLanguage

English

Publisher

ieee

Conference_Titel

Vehicular Technology Conference (VTC 2010-Spring), 2010 IEEE 71st

Conference_Location

Taipei

ISSN

1550-2252

Print_ISBN

978-1-4244-2518-1

Electronic_ISBN

1550-2252

Type

conf

DOI

10.1109/VETECS.2010.5494042

Filename

5494042