acoustic echo cancellation in long distence telephone systems(repost)

Cancelado Publicado May 26, 2006 Pagado a la entrega
Cancelado Pagado a la entrega

In long-distence telephone systems the hybrid circuit at the exchange provides seperate paths for each direction of transmission. The hybrid network is required to ensure that the speech signal from the distant customer does not leak into its output path. however, due to the impedence mismatches some of the incoming signal is leacked into the output path and is returned to the distant customer as an echo. Adaptive echo cancelling can be overcome the problem.

The main objectives of this project are:

To design an adaptive echo cancelling scheme for use in long-distance telephone systems.

To simulate the system using MATLAB and investigate its, performance using the least mean squares (LMS) and recursive least squares (RLS) adaptive algorithms.

The relative merits of the two algorithms should be investigated in terms of complexity, tracking ability and sensitivity to the finite word length effects.

The design of an adaptive echo cancelling scheme for this application would be a real academic chanllenge. Simulation using MATLAB would be another challenge of the project. Part of the system and the transmission channel must be simulated. Simulation results should demonstrate the cffectiveness of the

LMS and RLS adaptive algorithms in tracking signal non-stationarities.

[i need MATLAB coding or SIMULATION techniques by using Digital Signal Processing (DSP)]]

## Deliverables

1) Complete and fully-functional working program(s) in executable form as well as complete source code of all work done.

2) Deliverables must be in ready-to-run condition, as follows (depending on the nature of the deliverables):

a) For web sites or other server-side deliverables intended to only ever exist in one place in the Buyer's environment--Deliverables must be installed by the Seller in ready-to-run condition in the Buyer's environment.

b) For all others including desktop software or software the buyer intends to distribute: A software installation package that will install the software in ready-to-run condition on the platform(s) specified in this bid request.

3) All deliverables will be considered "work made for hire" under U.S. Copyright law. Buyer will receive exclusive and complete copyrights to all work purchased. (No GPL, GNU, 3rd party components, etc. unless all copyright ramifications are explained AND AGREED TO by the buyer on the site per the coder's Seller Legal Agreement).

## Platform

Windows XP

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Nº del proyecto: #3531088

Sobre el proyecto

Proyecto remoto Activo Jun 17, 2006