00000cab a22000003a 4500 UP-99796217609624819 Buklod 20231007234508.0 m |o d | ta 110120s xx d | ||r ||||| || DENGII eng Hasna, M.O. A performance study of dual-hop transmissions with fixed gain relays. pp. 1963-1968 This letter presents a study on the end-to-end performance of dual-hop wireless communication systems equipped with nonregenerative fixed gain relays and operating over flat Rayleigh-fading channels. More specifically, it first derives generic closed-form expressions for the outage probability and the average probability of error when the relays have arbitrary fixed gains. It then proposes a specific fixed gain relay that benefits from the knowledge of the first hop's average fading power and compares its performance with previously proposed relay gains that in contrast require knowledge of the instantaneous channel state information of the first hop. Finally, the letter investigates the effect of the relay saturation on the performance of the systems under consideration. Numerical results show that nonregenerative systems with fixed gain relays have a comparable performance to nonregenerative systems with variable gain, more complex, relays. These results also show that relay saturation of these systems results in a minimal loss in performance. Arbitrary fixed gain. Dual-hop transmission. Dual-hop wireless communication system. Error probability. Flat Rayleigh fading channel. Generic closed-form expression. Instantaneous channel state information. Nonregenerative fixed gain relay. Relay saturation. IEEE Transactions on wireless communications 3, 6 (2004). FO UPD DENG-II Article