Modulation diversity effects in rayleigh fading multipath channels

Author

Tavares de Alencar, Raphael ; de Araujo Cavalcante, Matheus ; Terllizzie Araujo Lopes, Waslon ; Lira de Queiroz, Wamberto Jose ; Sampaio de Alencar, Marcelo

Author_Institution

Fed. Univ. of Campina Grande (UFCG), Campina Grande, Brazil

fYear

2014

fDate

17-20 Aug. 2014

Firstpage

1

Lastpage

5

Abstract

The wireless channel has characteristics of multipath fading, due to reflection, refraction and scattering. Modulation diversity is a bandwidth-efficient diversity technique that uses rotation, associated with the interleaving between the in-phase and quadrature components of a digital signal constellation. It is intended to mitigate the effects of fading in wireless communications. The research considered a scenario in which multiple paths are simulated, with associated random multiplicative noise and delay. The multipath fading effect is studied in this scenario, and a comparison between the BER values for 4-PSK and 8-PSK transmission is presented, to evaluate the gain provided by the modulation diversity scheme. An analysis concerning optimum rotation angles is performed, considering eight multipath scenarios, including cases with severe fading effect.

Keywords

Rayleigh channels; diversity reception; error statistics; multipath channels; quadrature phase shift keying; BER; Rayleigh fading multipath channels; bandwidth-efficient diversity technique; digital signal constellation; modulation diversity effects; multipath fading; multiplicative noise; optimum rotation angles; quadrature components; wireless channel; Bit error rate; Fading; Gain; Phase shift keying; Signal to noise ratio; Wireless communication; Digital Communications; Modulation Diversity; Multipath Fading; Multipath Simulation;

fLanguage

English

Publisher

ieee

Conference_Titel

Telecommunications Symposium (ITS), 2014 International

Conference_Location

Sao Paulo

Type

conf

DOI

10.1109/ITS.2014.6948018

Filename

6948018