Title :
Performance evaluation of differential π/4-QPSK systems in a Rayleigh fading/delay spread/CCI/AWGN environment
Author :
Guo, Yanpeng ; Feher, Kamilo
Author_Institution :
Dept. of Electr. Eng. & Comput. Sci., California Univ., Davis, CA, USA
Abstract :
An experimental study and performance evaluation results are presented of differential π/4 quadrature phase-shift keying (QPSK) systems (π/4-DQPSK) in a Rayleigh fading and delay spread channel corrupted by additive white Gaussian noise (AWGN) and cochannel interference (CCI). The effect of time delay spread and the CCI on the bit error rate (BER) performance and the residual error floor of differential π/4-QPSK systems is evaluated. The spectral spreading of bandlimited π/4-QPSK systems due to nonlinear amplification is investigated. The beneficial effect of a hardlimiter in the receiver is investigated. The experimental results show that in a Rayleigh-faded channel, CCI and delay spread have significant impact on the BER performance and the residual error floor of differential π/4-QPSK systems
Keywords :
delays; fading; interference (signal); mobile radio systems; phase shift keying; random noise; telecommunication channels; AWGN; BER performance; Rayleigh fading; cochannel interference; delay spread channel; differential π/4-QPSK systems; mobile radio systems; nonlinear amplification; receiver handlimiter; residual error floor; AWGN; Band pass filters; Bit error rate; Delay; Mobile communication; Modems; Prototypes; Quadrature phase shift keying; Radiofrequency interference; Rayleigh channels;
Conference_Titel :
Vehicular Technology Conference, 1990 IEEE 40th
Conference_Location :
Orlando, FL
DOI :
10.1109/VETEC.1990.110358
