| The error probability expressions for BPSK modulated M-ary direct-spread spectrum systems with coherent RAKE receivers are derived in Rayleigh fading channel,which take into account the effect of chip timing and carrier phase errors.Non-diversity and three types of diversity schemes are considered:selection diversity,equal gain diversity combining,and maximal ratio diversity combining.Also,the approximate expressions of the error probability are derived.Finally,channel characteristics,diversity schemes,and synchronization errors’effects on the performance are discussed |
