A STUDY OF A BLIND MULTIPLE-BEAM ADAPTIVE ARRAY

In land mobile communication, CMA (Constant Modulus Algorithm) has bee n studied to reduce multipath fading effect. By this method, the trans mitted power is not used efficiently since all the multipath component s have the same information. To make use of received power efficiently , we propose a Blind Multiple Beam Adaptive Array. It has the followin g three Feature points. First, we use CMA which can reduce the multipa th fading effect to some extent without training signal. Second, LMS a lgorithm which can capture the multipath components which are separate d from the reference signal by some extent. Third, we use FDF (Fractio nal Delay Filter) and TED (Timing Error Detector) loop which can detec t and compensate fractional delay. As a result of utilizing the multip ath components which is suppressed by CMA, the proposed technique achi eves better performance than CMA adaptive array.