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A 2.35 KBPS Joint-Detection CDMA Speech Transceiver

A 2.35 KBPS Joint-Detection CDMA Speech Transceiver
A 2.35 KBPS Joint-Detection CDMA Speech Transceiver
The speech encoded bits generated by the proposed 2.35kbps prototype waveform interpolated (PWI) speech coder are channel-coded using turbo code. or convolutional codes and transmitted using a Joint-detection Code-division Multiple Access (JD-CDMA) scheme. The speech codec combines Zinc basis function excitation (ZFE) and mixed-multiband excitation (MMBE), in order to model the mixed voiced / unvoiced speech segments at the highest possible quality. At the receiver, a joint detection algorithm is used to separate the information of the different up-link users. It is demonstrated that for channel Signal-to-Noise Ratios (SNR) in excess of about 9dB near-unimpaired speech quality is achieved, virtually independently of the number of users supported, as long as the number of users does not exceed half of the spreading factor. Furthermore, due to the limited acceptable turbo interleaver latency the more complex turbo coded system did not outperform the convolutionally coded scheme.
2403 - 2407
Brooks, F.C.A.
b96b5810-fbdb-4aac-b5ee-c7eccd6bcb16
Kuan, E.L.
67ebe8dd-706a-4c9f-ba00-f38ff3da627f
Hanzo, L.
66e7266f-3066-4fc0-8391-e000acce71a1
Brooks, F.C.A.
b96b5810-fbdb-4aac-b5ee-c7eccd6bcb16
Kuan, E.L.
67ebe8dd-706a-4c9f-ba00-f38ff3da627f
Hanzo, L.
66e7266f-3066-4fc0-8391-e000acce71a1

Brooks, F.C.A., Kuan, E.L. and Hanzo, L. (1999) A 2.35 KBPS Joint-Detection CDMA Speech Transceiver. IEEE VTC'99, United States. 16 - 19 May 1999. 2403 - 2407 .

Record type: Conference or Workshop Item (Paper)

Abstract

The speech encoded bits generated by the proposed 2.35kbps prototype waveform interpolated (PWI) speech coder are channel-coded using turbo code. or convolutional codes and transmitted using a Joint-detection Code-division Multiple Access (JD-CDMA) scheme. The speech codec combines Zinc basis function excitation (ZFE) and mixed-multiband excitation (MMBE), in order to model the mixed voiced / unvoiced speech segments at the highest possible quality. At the receiver, a joint detection algorithm is used to separate the information of the different up-link users. It is demonstrated that for channel Signal-to-Noise Ratios (SNR) in excess of about 9dB near-unimpaired speech quality is achieved, virtually independently of the number of users supported, as long as the number of users does not exceed half of the spreading factor. Furthermore, due to the limited acceptable turbo interleaver latency the more complex turbo coded system did not outperform the convolutionally coded scheme.

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More information

Published date: May 1999
Additional Information: Event Dates: 16-19 May 1999 Organisation: IEEE Address: Houston, USA
Venue - Dates: IEEE VTC'99, United States, 1999-05-16 - 1999-05-19
Organisations: Southampton Wireless Group

Identifiers

Local EPrints ID: 257181
URI: http://eprints.soton.ac.uk/id/eprint/257181
PURE UUID: 86850a0a-8370-4d58-8594-9927737246c9
ORCID for L. Hanzo: ORCID iD orcid.org/0000-0002-2636-5214

Catalogue record

Date deposited: 03 Feb 2004
Last modified: 26 Nov 2019 02:06

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Contributors

Author: F.C.A. Brooks
Author: E.L. Kuan
Author: L. Hanzo ORCID iD

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