Wireless Videophone Schemes
Wireless Videophone Schemes
A range of 5-11.36 kbps videophone codecs are proposed and the 11.36 kbps codec 1, the 8.52 kbps Codecs 2 and the 8 kbps Codec 2a are embedded in the intelligent re-configurable systems 1-3. After sensitivity-matched binary Bose-Chaudhuri-Hocquenghem (BCH) forward error correction (FEC) coding the data rate associated with Codec 1 and Codec 2a became 20.32 kbps, while that of Codec 2 was 15.24 kbps. When using Codec 1 in System 1 and coherent pilot symbol assisted 16-level quadrature amplitude modulation (16-PSAQAM), an overall signalling rate of 9 kBd was yielded. Over lower quality channels the 4QAM mode of operation had to be invoked, which required twice as many time slots to accommodate the resulting 18 kBd stream. In a bandwidth of 200 kHz, similarly to the Pa-European GSM mobile radio system’s speech channel, using Systems 1 and 3 for example, 126 and 8 videophone users can be supported in the 16QAM and 4QAM modes, respectively. All system features are summarised in Table 3.
692-696
Hanzo, L
66e7266f-3066-4fc0-8391-e000acce71a1
Streit, J
00c8766c-91a2-4ed0-a543-0549499907ec
November 1995
Hanzo, L
66e7266f-3066-4fc0-8391-e000acce71a1
Streit, J
00c8766c-91a2-4ed0-a543-0549499907ec
Hanzo, L and Streit, J
(1995)
Wireless Videophone Schemes.
of ICUPC'95, Tokyo, Japan.
06 - 10 Nov 1995.
.
Record type:
Conference or Workshop Item
(Other)
Abstract
A range of 5-11.36 kbps videophone codecs are proposed and the 11.36 kbps codec 1, the 8.52 kbps Codecs 2 and the 8 kbps Codec 2a are embedded in the intelligent re-configurable systems 1-3. After sensitivity-matched binary Bose-Chaudhuri-Hocquenghem (BCH) forward error correction (FEC) coding the data rate associated with Codec 1 and Codec 2a became 20.32 kbps, while that of Codec 2 was 15.24 kbps. When using Codec 1 in System 1 and coherent pilot symbol assisted 16-level quadrature amplitude modulation (16-PSAQAM), an overall signalling rate of 9 kBd was yielded. Over lower quality channels the 4QAM mode of operation had to be invoked, which required twice as many time slots to accommodate the resulting 18 kBd stream. In a bandwidth of 200 kHz, similarly to the Pa-European GSM mobile radio system’s speech channel, using Systems 1 and 3 for example, 126 and 8 videophone users can be supported in the 16QAM and 4QAM modes, respectively. All system features are summarised in Table 3.
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js-lh-icupc-1995.pdf
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More information
Published date: November 1995
Additional Information:
Event Dates: 6-10 November 1995 Address: Tokyo, Japan
Venue - Dates:
of ICUPC'95, Tokyo, Japan, 1995-11-06 - 1995-11-10
Organisations:
Southampton Wireless Group
Identifiers
Local EPrints ID: 257117
URI: http://eprints.soton.ac.uk/id/eprint/257117
PURE UUID: 5103c730-a82c-4dd3-bacc-d8a1c09311f2
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Date deposited: 02 Jan 2003
Last modified: 18 Mar 2024 02:33
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Contributors
Author:
L Hanzo
Author:
J Streit
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