EFFECTS OF PRMA ON OBJECTIVE SPEECH QUALITY

被引：3

作者：

CHEUNG, JCS ^{[1
]}

HANZO, L ^{[1
]}

WEBB, WT ^{[1
]}

STEELE, R ^{[1
]}

机构：

[1] UNIV SOUTHAMPTON,DEPT ELECTR & COMP SCI,SOUTHAMPTON SO9 5NH,HANTS,ENGLAND

来源：

ELECTRONICS LETTERS | 1993年 / 29卷 / 02期

关键词：

SPEECH INTELLIGIBILITY; DIGITAL COMMUNICATION SYSTEMS;

D O I：

10.1049/el:19930102

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

When transmitting 32 kbit/s adaptive differential pulse (ADPCM) speech using Reed-Solomon error correction coding and 16 level quadrature amplitude modulation (16-QAM), our 20 slot packet reservation multiple access (PRMA) assisted cordless telecommunications (CT) scheme supported 36-38 speech users with negligible objective and subjective speech degradation. The average number of users per slot was nearly doubled due to deploying PRMA and toll quality speech was transmitted in a user bandwidth approximately 11.6 kHz. For a channel signal-to-noise ratio (SNR) in excess of 25 dB, a Rayleigh fading channel and mobile speeds above 2 mph the speech segmental SNR degradation was less than 0.3 dB.

引用

页码：152 / 153

页数：2

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