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QDPSK signal transmission performance with postdetection selection diversity reception in land mobile radio

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2 Author(s)
Ohno, K. ; NTT Radio Commun. Syst. Lab., Kanagawa, Japan ; Adachi, F.

The bit error rate (BER) performance of 16-128 kb/s Nyquist raised-cosine filtered quaternary differential phase-shift keying (RC-QDPSK) signal transmission was experimentally investigated. Two-branch postdetection selection diversity reception was employed. Measured results are presented for the BER performance due to additive white Gaussian noise (AWGN), cochannel interference, and multipath channel delay spread. Field BER measurements were also conducted at a carrier frequency of 1.45 GHz in an area characterized by high-rise buildings and in an area surrounded by mountains. The results show that postdetection selection diversity is a simple yet powerful technique to improve the BER performance in fading mobile radio channels

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Vehicular Technology, IEEE Transactions on  (Volume:40 ,  Issue: 4 )