A high speed DSP PSK modem for real time digital speech transmission

Author

Corden, I.R. ; Carrasco, R.A.

Author_Institution

Staffordshire Polytech., Stafford, UK

fYear

1989

fDate

2-5 Apr 1989

Firstpage

333

Lastpage

339

Abstract

Describes the implementation of a coherent 9600 bps QPSK modem, which is fully realized using single TMS320C25 DSP systems, where all-digital phase locked loops are used for the baud timing and carrier recovery in the receiver. Due to the heavy computational burden in DSP modems and the speed restrictions of currently available devices, a new multimicroprocessing receiver is also presented which is shown to be able to support 32 Kbps data communication using coherent QPSK demodulation, and is suitable for use in ADPCM digital speech transmissions

Keywords

digital signal processing chips; modems; voice communication; 9.6 Kbit/s; ADPCM; TMS320C25; all-digital phase locked loops; baud timing; carrier recovery; high speed DSP PSK modem; multimicroprocessing receiver; real time digital speech transmission;

fLanguage

English

Publisher

iet

Conference_Titel

Telecommunications, 1989. Second IEE National Conference on

Conference_Location

York

Type

conf

Filename

20731

Link To Document

https://search.isc.ac/dl/search/defaultta.aspx?DTC=49&DC=273523