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
May 1999
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, Houston, United States.
16 - 19 May 1999.
.
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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fcab-elk-lh-vtcfall-1999.pdf
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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, Houston, 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
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Date deposited: 03 Feb 2004
Last modified: 18 Mar 2024 02:33
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Contributors
Author:
F.C.A. Brooks
Author:
E.L. Kuan
Author:
L. Hanzo
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