Variable threshold detection with weighted BPSK/PCM speech signals transmitted over Gaussian channel

Author

Ahn, Seung Choon ; Lee, Moon Ho

Author_Institution

Dept. of Inf. & Telecommun. Eng., Training Inst. of Korea Telecommun. Authority, Taiejon, South Korea

Volume

38

Issue

12

fYear

1990

fDate

12/1/1990 12:00:00 AM

Firstpage

2094

Lastpage

2098

Abstract

Varible threshold detection with weighted pulse code modulation encoded signals transmitted over Gaussian channel is investigated. In general, the bits in any encoded PCM word are transmitted with equal energy on all transmitted bits. To obtain gains in overall signal-to-noise (SNR) ratio, each bit in a PCM-word has been previously weighted according to its significance in the transmitter. For further improvement in SNR, an erasure zone is established at the receiver according to the value of each bit´s significance. Therefore, it the output signal transmitted with weighted energy falls into the erasure zone, the regenerated sample is replaced by interpolation. The overall system SNR for BPSK/PCM speech signals of this technique has been found

Keywords

phase shift keying; pulse-code modulation; signal detection; speech analysis and processing; telecommunication channels; voice communication; BPSK/PCM speech signals; Gaussian channel; SNR; encoded PCM word; encoded signals; erasure zone; interpolation; output signal; receiver; transmitter; variable threshold detection; weighted energy; weighted pulse code modulation; Binary phase shift keying; Bit error rate; Gaussian channels; Interpolation; Phase change materials; Pulse modulation; Signal to noise ratio; Silicon compounds; Speech; Transmitters;

fLanguage

English

Journal_Title

Communications, IEEE Transactions on

Publisher

ieee

ISSN

0090-6778

Type

jour

DOI

10.1109/26.64648

Filename

64648