用於多天線輸入多天線輸出多碼多載波系統之新型遞迴式多層級偵測技術

Abstract

這篇論文提出在多天線輸入多天線輸出多碼多載波 (MIMO MC-MC) 系統下的一種新型遞迴式多層級偵測技術。我們推導一種簡單的適應性最小平均平方誤差等化器 (MMSE) ，且使用層級式天線干擾消除概念 (LAIC) 來減輕天線之間的相互干擾 (IAI) 並得到初始的資料偵測。接著藉由多路徑干擾消除技術達到空間分集及多路徑分集的目的。使用蒙地卡羅模擬驗證我們提出的偵測技術在多路徑衰退通道上的效能。模擬結果證實這種遞迴式多層級偵測方法在MIMO MC-MC系統下不只能得到高頻寬效率還能達到高功率效率。故此技術在下一代行動通訊系統中可能是一種可實行的方案。

This paper describes a novel iterative multi-layered detection method for MIMO multi-code multicarrier (MIMO MC-MC) system. We derive a simple adaptive minimum mean square error (MMSE) equalizer followed by a layered antenna interference cancellation (LAIC) technique to mitigate the inter-antenna interference (IAI) and obtain initial data decision. Afterwards, a multipath interference cancellation (MPIC) method is exploited to fully achieve both spatial diversity and multipath diversity. Monte Carlo simulations have been used to verify the performance of the proposed method in multipath fading channels. Simulation results demonstrate that with this iterative multi-layered detection approach, a MIMO MC-MC system is able to achieve not only high bandwidth efficiency but also high power efficiency, and it could be a good candidate for implementing the next generation mobile radio systems.