Interference Cancellation in Heterogeneous Networks

因為無線傳輸的廣播特性，異質網路基地台之間同一頻代的干擾是限制系統效能的一個重要因素。為了克服這個限制，許多減少干擾的方法用於室內基地台(femto-cell) 已經被提出。這些方法主要是傳輸能量控制(power control) 和頻譜配置(spectrum allocation)。在這篇論中，透過污紙編碼(dirty paper coding)，我們提出干擾消除的方法適用室內基地台。模擬結果顯示出我們所提出的方法可以有效減少錯誤率(bit error rate) 並且增加傳輸量(throughput)。模擬結果顯示效能有很大的進步並且對3GPP 系統標準制定的影響不大，因此可以直接 用於此系統中。Due to the broadcasting nature of wireless transmission, the cochannel interference in heterogeneous networks among the cells can be a potential limiting factor in system design. To overcome this limitation, many interference mitigation techniques for femto-cells have been proposed, which mainly focus on power control and spectrum allocation. In this thesis, through the technique of dirty-paper coding, we propose the interference cancellation (IC) method for femto-cells. The simulations show that the proposed method can further apply to reduce the bit error rate (BER) and increase the throughput. Both the significant performance improvements and backward compatibility implies the proposed method has immediate potential in 3GPP systems