Combined Effects of Phase Sweeping Transmitter Diversity and Channel Coding

A two-branch phase sweeping transmitter diversity scheme that can produce forced fast fading at the receiver is proposed for improving the effect of channel coding on bit error rate (BER) performance in very slow multipath fading environments. While the proposed transmitter diversity requires two transmit antennas, a single receive antenna can be used. Hence, it is most applicable for digital paging systems that require very simple receivers. The digital modulated signal is transmitted simultaneously from the two spatially separated antennas, with the carrier for one antenna being phase modulated by the phase sweeping function (f). Two sweeping functions are considered: n(t) = A