Fast communication: SAGE-based estimation of doubly selective channel with an orthogonal polynomial model

Authors:
Feng Yang;Jian Song;Yu Zhang;Changyong Pan;Zhixing Yang
Affiliations:
Department of Electronic Engineering, Tsinghua National Laboratory for Information Science and Technology (TNLIST), Tsinghua University, Beijing 100084, PR China;Department of Electronic Engineering, Tsinghua National Laboratory for Information Science and Technology (TNLIST), Tsinghua University, Beijing 100084, PR China;Department of Electronic Engineering, Tsinghua National Laboratory for Information Science and Technology (TNLIST), Tsinghua University, Beijing 100084, PR China;Department of Electronic Engineering, Tsinghua National Laboratory for Information Science and Technology (TNLIST), Tsinghua University, Beijing 100084, PR China;Department of Electronic Engineering, Tsinghua National Laboratory for Information Science and Technology (TNLIST), Tsinghua University, Beijing 100084, PR China
Venue:
Signal Processing
Year:
2008

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Abstract

A space alternating generalized expectation-maximization (SAGE)-based estimation algorithm for doubly selective channel is proposed, which has very similar performance to the rectangular-windowed least squares methods introduced by Borah and Hart while providing large savings in computational complexity. Theoretical analysis shows that the proposed algorithm is always globally convergent. The convergence rate is also investigated through simulations.