A Unique Low Complexity Parameter Independent Adaptive Design for Echo Reduction

  • Pranab DasEmail author
  • Abhishek Deb
  • Asutosh Kar
  • Mahesh Chandra
Part of the Smart Innovation, Systems and Technologies book series (SIST, volume 27)


Acoustic echo is one of the most important issues in full duplex communication. The original speech signal is distorted due to echo. For this adaptive filtering is used for echo suppression. In this paper our objective is to cancel out the acoustic echo in a sparse transmission channel. For this purpose many algorithms have been developed over the period of time, such as Least Mean Square (LMS), Normalized LMS (NLMS), Proportionate NLMS (PNLMS) and Improved PNLMS (IPNLMS) algorithm. Of all these algorithms we carry out a comparative analysis based on various performance parameters such as Echo Return Loss Enhancement, Mean Square Error and Normalized Projection Misalignment and find that for the sparse transmission channel all these algorithm are inefficient. Hence we propose a new algorithm modified -μ- PNLMS, which has the fastest steady state convergence and is the most stable among all the existing algorithms, this we show based on the simulation results obtained.


Acoustic Echo Adaptive Filter Echo Return Loss Enhancement LMS Mean Square Error Sparse Transmission Channel 


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Copyright information

© Springer International Publishing Switzerland 2014

Authors and Affiliations

  • Pranab Das
    • 1
    Email author
  • Abhishek Deb
    • 1
  • Asutosh Kar
    • 1
  • Mahesh Chandra
    • 2
  1. 1.Department. of Electronics and Telecommunication EngineeringIndian Institute of Information TechnologyBhubaneswarIndia
  2. 2.Department of Electronics and Communication EngineeringBirla Institute of TechnologyMesraIndia

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