子空間方法用於階數未知的盲道判別

Abstract

本篇論文提出了兩套判斷步驟， 對於一個階數M但未知的盲道判別問題來說，只要假設一個大於實際階數M的階數M'，稱為過估測階數， 以M'來取代未知的M，便可利用子空間方法的基本架構， 配合判斷步驟， 將過估測階數還原成實際階數，得到一組通道參數估測， 與實際的通道參數相差一純量倍數。

Subspace method for blind channel identification of communication channels usually require that the channel order is known. This requirement is not realistic in practice. We propose algorithms for the determination of channel order, when only an upper bound of the channel order is known, so that the subspace method can be used for channel identification.