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Stopping Criteria Analysis of the OMP Algorithm for Sparse Channels Estimation

  • Grzegorz Dziwoki
  • Jacek Izydorczyk
Conference paper
Part of the Communications in Computer and Information Science book series (CCIS, volume 522)

Abstract

Wireless propagation environment utilised by broadband transmission systems usually has a sparse nature, i.e. only several isolated propagation paths are essential for information transfer. Receiver can recover the parameters of the particular paths using greedy, iterative algorithms that belong to the family of compressed sensing techniques. How to stop the iterative procedure, if no precise knowledge about the order of the channel sparsity is available in the receiver a priori, is a key question regarding a practical implementation of the method. The paper provides stopping criteria analysis of the Orthogonal Matching Pursuit (OMP) algorithm that is used as the core of the channel impulse response estimation method for Time-Domain Synchronous OFDM transmission system. There are investigated the residual error and the difference of successive residual errors of the OMP algorithm, as the possible metrics applied to stop the iteration procedure. Finally, a new heuristic stopping rule based on these two errors is proposed and numerically examined.

Keywords

Time domain estimation Compressive sensing Greedy methods Orthogonal matching pursuit 

Notes

Acknowledgement

This work was supported by the Silesian University of Technology, Institute of Electronics under statutory research program in 2015.

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Copyright information

© Springer International Publishing Switzerland 2015

Authors and Affiliations

  1. 1.Institute of ElectronicsSilesian University of TechnologyGliwicePoland

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