Abstract
AbstractLand mobile communications systems that implement spread spectrum are being actively researched. With direct‐sequence spread spectrum, performance is predicted to improve by dividing a multipath delay wave into separate paths, using path diversity combining, and so‐called path diversity receiver.Generally, although performance improves with an increase in the number of branches in a path diversity system, a small number of branches is preferred with the implementation of a receiver. Hence, this paper analyzes the performance when n = 2 for a model of a path diversity receiver where n paths are selected from M candidate paths in order of the largest instantaneous signal‐to‐noise (S/N) ratio, and bearing in mind the receiver that produces the maximal ratio combining. The results show that there is no significant difference between n = 4 and n = 2 when M = 4. The average power delay profile shows the number of effective branches when applying a system of n = 2 branches to path diversity for both the exponential and rectangular models. Also, the theoretical value for the BPSK and FSK average bit error rate performance is determined for a primary modulation system with the rectangular model.
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