Total echo cancellation in a 56K modem application, 1998

Item — Call Number: MU Thesis Ho

Identifier: b2194890

Staff Only

Scope and Contents

From the Collection:

The collection consists of theses written by students enrolled in the Monmouth College and Monmouth University graduate Electronic Engineering programs. The holdings are bound print documents that were submitted in partial fulfillment of requirements for the Master of Science degree.

Dates

Creation: 1998

Creator

Ho, Pei-Li (Author, Person)
Drucker, Harris (1943-2024) (Thesis advisor, Person)

Conditions Governing Access

All analog collection holdings are limited to library use only.

Researchers seeking to photocopy collection materials must complete an Application to Photocopy Form.

In some cases, photocopying of collection materials may be performed by the Monmouth University Library staff.

The Monmouth University Library reserves the right to limit or refuse duplication requests subject to the condition of collection materials and/or restrictions imposed by the collection creators or by the United States Copyright Act.

Permission to examine, or copy, collection materials does not imply permission to publish or quote. It is the responsibility of the researcher to obtain such permissions from both the copyright holder and Monmouth University.

Extent

1 Items (print book) : 34 pages ; 8.5 x 11.0 inches (28 cm).

Language of Materials

English

Additional Description

Abstract

This document describes the implementation of a coupled echo canceler (or named total echo canceler) on a 56K PCM modem.

It gives an overview of the 56K PCM technology and the need of using a coupled echo canceler (EC) at the receiver of the client modem in order to alleviate the reception errors during high speed data transmissions.

The author has provided theoretical analysis of both decoupled EC and coupled EC and shown that coupled EC decreases the residual echo in comparison to decoupled EC. In addition, experimental results of mean square error (MSE) and throughput comparisons prove that coupled EC does reduce the errors during the initial connection and data transmissions.

The author has also included the source code for the software modules that were implemented for the total echo canceler on a DSP 16XX processor and the negligible overhead (memory and processor time) of using a coupled EC.

Partial Contents

Introduction -- 56K PCM modem -- Receiver for 56K client modem -- Echo cancellation -- Experimental results -- Implementation of coupled TEC -- Conclusion.