Title :
Time diversity for digital mobile radio
Author :
Turkmani, A.D. ; De Toledo, A.
Author_Institution :
Dept. of Electr. Eng. & Electron., Liverpool Univ., UK
Abstract :
A software investigation was undertaken to assess the performance of signal transmissions over a Rayleigh fading mobile radio channel, and to compare the effective utilization of the channel by other time diversity techniques. It involved the simulation of a communication system using Manchester-encoded data with a bit rate of 8 kb/s, phase shift keying (PSK) modulation, and ideal coherent demodulation. The diversity techniques investigated are voting, selection, and combining with different signal strength weighting factors. Results show that postdetection linear combining (unity weighting factor) yields the maximum diversity improvement. It is shown that an improvement in the bit error rate (BER) performance is possible without increasing the number of repeated words
Keywords :
digital radio systems; digital simulation; diversity reception; mobile radio systems; phase shift keying; telecommunications computing; 8 kbit/s; BER performance; Manchester-encoded data; PSK; Rayleigh fading; bit error rate; coherent demodulation; combining; communication system; digital mobile radio; modulation; phase shift keying; postdetection linear combining; selection; signal strength weighting factors; signal transmissions; simulation; software; time diversity; unity weighting factor; voting; Bit error rate; Bit rate; Demodulation; Diversity reception; Land mobile radio; Phase modulation; Phase shift keying; Rayleigh channels; Software performance; Voting;
Conference_Titel :
Vehicular Technology Conference, 1990 IEEE 40th
Conference_Location :
Orlando, FL
DOI :
10.1109/VETEC.1990.110387
