Nada Ebaid, Mona Shokair & Sami A. El Dolil
In this paper, multihop cooperative relaying system will be studied. Multi-antennas system will be applied at multi hopping relay nodes to improve Signal to Noise Ratio (SNR) of the transmitted signal at its destination which is not clarified until now. The performance of the system will be compared with using single antenna at relay nodes under different kinds of modulations. Analysis of the system will be made. Fixed power amplify and forward strategy will be used at relay nodes. The multihop system with different number of antennas introduces the benefits of diversity. The performance of multi hop multi-antennas gives improvement in performance approximately 4dB than multi hop single antenna system at symbol error rate (SER) equal to in two hops using BPSK modulation technique.