A comparison of multipath effect of digital modulations for mobile channels

Author

Ali, Adel A. ; Al-Kadi, Ibrahim

Author_Institution

Electr. Eng. Dept., King Saud Univ., Riyadh, Saudi Arabia

fYear

1988

fDate

13-17 Jun 1988

Firstpage

291

Lastpage

294

Abstract

Binary phase-shift keying (BPSK), quaternary phase-shift-keying (QPSK), and minimum-shift-keying (MSK) are compared for transmission over multipath radio channels. The channel is modeled as a two-ray channel, with the reflected ray attenuated in amplitude, phase-shifted, and time-delayed with respect to the direct ray. Computer simulation is used to obtain the bit-error-rate for various fade parameters, transmission speeds and bit energy to noise spectral density ratios. It is shown that coherent PSK outperforms QPSK and MSK if compared at the same symbol rate. If a bit rate is kept unchanged, then QPSK slightly outperforms BPSK. MSK is more resistant to intersymbol interference caused by high transmission rate than BPSK. However, irreducible errors occur more often in MSK

Keywords

fading; mobile radio systems; phase shift keying; MSK; QPSK; digital modulations; fade; intersymbol interference; mobile channels; multipath; phase-shift keying; radio channels; symbol rate; two-ray channel; Analytical models; Binary phase shift keying; Delay; Digital modulation; Educational institutions; Fading; Land mobile radio; Phase shift keying; Quadrature phase shift keying; Scattering;

fLanguage

English

Publisher

ieee

Conference_Titel

Electrotechnics, 1988. Conference Proceedings on Area Communication, EUROCON 88., 8th European Conference on

Conference_Location

Stockholm

Type

conf

DOI

10.1109/EURCON.1988.11159

Filename

11159