BIT ERROR RATE CHARACTERISTICS OF ANTI-MULTIPATH MODULATION TECHNIQUEBPSK-RZ IN HILLY AREAS

Bit error rates of high speed transmission, from 128 to 1024 kbps, wer e measured for BPSK and anti-multipath modulation BPSK-RZ, in a microc ell model propagation environment where reflections from hills are rem arkable. Compared with the measured multipath structures, BPSK-RZ can improve bit error rate, not only for reflected waves from buildings, b ut also for hill-reflected waves, the propagation structure of which i s different from normal reflection. This paper shows that the measured dependence of bit error rates on delay time and transmission bit rate well coincides with the theoretical values. Using the relation betwee n the bit error rate of BPSK-RZ and transmission bit rate, the approxi mate maximum delay time of multipath wave can be measured. (C) 1997 Sc ripta Technica, Inc.