在Multihop電力線通訊系統,我們考慮一個Source,兩個中繼節點與一個目的端。先前的Multihop電力線主題,當中繼節點接收到來自Source的重傳資料,它們使用傳統的DSTBC與矩陣全是解碼傳送(DAF)的元素來傳送資料,且他們沒有考慮資料在中繼節點可能會有解碼錯誤的狀況,導致系統的錯誤率上升。和先前文獻不同的地方在於我們提出嵌入式(放大傳送)AAF/DAF的DSTBC元素並且結合OL來重傳資料。使用OL可以增加系統的效能因為當擁有正確資料的中繼節點傳送資料到目的端時,不正確資料的中繼節點會藉由聆聽正確的資料。透過模擬結果的比較,在脈衝雜訊模式參數δ為0.8且錯誤率在10-3時我們提出來的主題比之前的傳統DSTBC矩陣全是DAF的元素好1.5dB。
In the power line communication (PLC) system, we consider the multihop networks of one source, two repeaters, and one destination. In the previous multihop PLC scheme, when the repeaters receive the retransmission data from the source, they use the traditional DSTBC with all decode and forward (DAF) elements to transmit the data and they don’t consider the incorrect decoding that increases the bit error rate. Different from the previous work, we propose DSTBC with embedded adaptive DAF/AAF elements and opportunistic listening (OL) for data retransmission. Using OL can enhance the system performance because the incorrect repeater is listening to the correct repeater when it transmits the data to the destination. The simulation result shows that for impulse noise mode parameter δ =0.8 at BER 10-3 our proposed system has 1.5dB gain over the previous scheme with the traditional DSTBC with all DAF elements.