Abstract:

Lowcomplexity and highperformance of diversity combing schemes always conflict. A new hybrid combining technique named SSCSC is proposed, which is composed of Selection Combining (SC) and SwitchandStay Combining (SSC). The SSCSC scheme with 2L branches in Rayleigh fading channel is studied. The closedform expressions for the average output SignaltoNoise Ratio (SNR), Bit Error Ratio (BER), Level Crossing Rate (LCR) and Average Output Duration (AOD) of the SSCSC system are provided. Finally, the proposed SSCSC is compared with SC and with Generalized Selection Combining (GSC). Results show that the performance of SSCSC is not as good as that of SC and GSC but is still acceptable. From the standpoint of implementation, SSCSC is characterized by simple structure, easy realization and resources saving. With these characteristics, SSCSC is feasible for practical application.

Key words: communication, hybrid combining, Switchandstay combing (SSC, Selection Combining (SC), average output SNR, Bit Error Ratio (BER), Level Crossing Rate (LCR), Average Output Duration (AOD)