Performance of FH/MFSK Systems for Speech with Activity Detector over Rayleigh Fading Channels

Jyh-Horng WEN; Jee-Wey WANG

Performance of FH/MFSK Systems for Speech with Activity Detector over Rayleigh Fading Channels

Jyh-Horng WEN, Jee-Wey WANG

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This paper presents the performance of FH/MFSK systems, which exploit silent gaps in speech to accommodate more users, over Rayleigh fading channels. Two kinds of receivers are considered: one uses a threshold on the received signal strength to declare whether the signals were present or not, and the other is assumed to have perfect transmitter-state information obtained from using additional bandwidth. Results show that, if the codeword dropping and codeword error are assumed to be equally costly, the former can achieve slightly better performance than the latter in the decoding error probability. This finding suggests that, for the system to exploit silent gaps in speech, it is advantageous for the receiver to use a threshold to declare whether signals were present or not instead of relying on the transmitter-state information.

Publication: IEICE TRANSACTIONS on Fundamentals Vol.E81-A No.10 pp.2101-2108

Publication Date: 1998/10/25

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Type of Manuscript: Special Section PAPER (Special Section on Information Theory and Its Applications)

Category: Spread Spectrum System

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Jyh-Horng WEN, Jee-Wey WANG, "Performance of FH/MFSK Systems for Speech with Activity Detector over Rayleigh Fading Channels" in IEICE TRANSACTIONS on Fundamentals, vol. E81-A, no. 10, pp. 2101-2108, October 1998, doi: .
Abstract: This paper presents the performance of FH/MFSK systems, which exploit silent gaps in speech to accommodate more users, over Rayleigh fading channels. Two kinds of receivers are considered: one uses a threshold on the received signal strength to declare whether the signals were present or not, and the other is assumed to have perfect transmitter-state information obtained from using additional bandwidth. Results show that, if the codeword dropping and codeword error are assumed to be equally costly, the former can achieve slightly better performance than the latter in the decoding error probability. This finding suggests that, for the system to exploit silent gaps in speech, it is advantageous for the receiver to use a threshold to declare whether signals were present or not instead of relying on the transmitter-state information.
URL: https://global.ieice.org/en_transactions/fundamentals/10.1587/e81-a_10_2101/_p

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@ARTICLE{e81-a_10_2101,
author={Jyh-Horng WEN, Jee-Wey WANG, },
journal={IEICE TRANSACTIONS on Fundamentals},
title={Performance of FH/MFSK Systems for Speech with Activity Detector over Rayleigh Fading Channels},
year={1998},
volume={E81-A},
number={10},
pages={2101-2108},
abstract={This paper presents the performance of FH/MFSK systems, which exploit silent gaps in speech to accommodate more users, over Rayleigh fading channels. Two kinds of receivers are considered: one uses a threshold on the received signal strength to declare whether the signals were present or not, and the other is assumed to have perfect transmitter-state information obtained from using additional bandwidth. Results show that, if the codeword dropping and codeword error are assumed to be equally costly, the former can achieve slightly better performance than the latter in the decoding error probability. This finding suggests that, for the system to exploit silent gaps in speech, it is advantageous for the receiver to use a threshold to declare whether signals were present or not instead of relying on the transmitter-state information.},
keywords={},
doi={},
ISSN={},
month={October},}

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TY - JOUR
TI - Performance of FH/MFSK Systems for Speech with Activity Detector over Rayleigh Fading Channels
T2 - IEICE TRANSACTIONS on Fundamentals
SP - 2101
EP - 2108
AU - Jyh-Horng WEN
AU - Jee-Wey WANG
PY - 1998
DO -
JO - IEICE TRANSACTIONS on Fundamentals
SN -
VL - E81-A
IS - 10
JA - IEICE TRANSACTIONS on Fundamentals
Y1 - October 1998
AB - This paper presents the performance of FH/MFSK systems, which exploit silent gaps in speech to accommodate more users, over Rayleigh fading channels. Two kinds of receivers are considered: one uses a threshold on the received signal strength to declare whether the signals were present or not, and the other is assumed to have perfect transmitter-state information obtained from using additional bandwidth. Results show that, if the codeword dropping and codeword error are assumed to be equally costly, the former can achieve slightly better performance than the latter in the decoding error probability. This finding suggests that, for the system to exploit silent gaps in speech, it is advantageous for the receiver to use a threshold to declare whether signals were present or not instead of relying on the transmitter-state information.
ER -