Error performance of π/2-TFSK 2-bit differential detection over the band-limited multipath interfering mobile radio environments

Author

Horikoshi, Jun

Author_Institution

Dept. of Electron. Eng., Gunma Univ., Japan

fYear

1990

fDate

6-9 May 1990

Firstpage

425

Lastpage

430

Abstract

A modulation scheme named π/2-TFSK shows a superior error performance to MSK (minimum shift keying) in a frequency-selective mobile radio channel. The 2-bit differential detection of π/2-TFSK with a raised-cosine type premodulation lowpass filter is analyzed under the frequency-selective mobile radio environment, and a better error performance than MSK is demonstrated. These characteristics are confirmed through an experimental simulation in the laboratory. As the frequency-selective fading model a two Rayleigh-fading-wave model with a constant group time delay is adopted. The system is implemented with a transmission rate of 64 kb/s. and a quadrature-type modulator is used with the carrier frequency of 900 MHz band. The RAM-type demodulator is used as the differential detector

Keywords

demodulators; fading; frequency shift keying; low-pass filters; mobile radio systems; modulators; π/2-TFSK; 64 kbit/s; 900 MHz; RAM-type demodulator; Rayleigh-fading-wave model; UHF; band-limited multipath interfering; constant group time delay; differential detection; error performance; frequency-selective mobile radio; premodulation lowpass filter; quadrature-type modulator; Band pass filters; Bandwidth; Degradation; Delay lines; Demodulation; Fading; Frequency; Laboratories; Land mobile radio; Signal processing;

fLanguage

English

Publisher

ieee

Conference_Titel

Vehicular Technology Conference, 1990 IEEE 40th

Conference_Location

Orlando, FL

ISSN

1090-3038

Type

conf

DOI

10.1109/VETEC.1990.110359

Filename

110359