在兩次跳躍的環境運用放大前向系統下考慮多天線以及同頻道間的干擾之效能分析

Abstract

這篇論文主要考慮在兩次跳躍的環境運用放大前向系統下，在中繼端 (Relay) 和最終接收端 (Destination) 都存在有同頻干擾的環境，傳送端 (Source) 使用運用多天線和正交時空編碼技術來增加系統的效能。主要分析了系統中斷機率 (Outage Probability) 和錯誤率 (Bit Error Rate, BER) 在多干擾環境下的效能，主要貢獻是得到在可變增益 (Variable-Gain) 和 固定增益 (Fixed-Gain) 兩種傳送方式下的封閉解 (Closed-Form)。此外，也討論了通道估測錯誤對於可變增益傳送方式的影響。最後用模擬結果來驗證我們的理論結果。

The thesis investigates the performance of a dual-hop amplify-and-forward relaying system with co-channel interference at both the relay and destination nodes. The source node is equipped with multiple antennas and adopts the orthogonal space-time block code to increase the system performance. Both the outage probability and the average bit error rate under the presence of multiple Rayleigh fading interferers are obtained in closed form for the variable and fixed-gain relaying schemes. Moreover, the effect of imperfect channel estimation on the variable-gain relaying scheme is also discussed. The effect of co-channel interference at both the relay and destination nodes are discussed. Simulation experiments are also conducted to verify the theoretical derivations.