Automatic gain control for propagation analysis and countermeasures

Author

Zolghadr, F. ; Honary, B. ; Maundrell, M.

Author_Institution

Warwick Univ., Coventry, UK

fYear

1991

fDate

22-25 Jul 1991

Firstpage

206

Lastpage

211

Abstract

The widespread use of digital signal processor based modems over the HF channel has given rise to a need for more complex signal conditioning requirements. These requirements are usually in the form of fast automatic gain control (AGC) units and reliable real-time channel evaluation (RTCE) subsystems. The function of the AGC units is to overcome the severe signal fading conditions experienced over the HF channel. The RTCE subsystems are used in conjunction with channel coding and system management routines to improve the overall reliability of the system. The authors describe a new digital based AGC system (Mc-AGC) which performs the above two requirements in one algorithm. The Mc-AGC system has been developed to operate in conjunction with 4 tone MFSK modems

Keywords

automatic gain control; computerised signal processing; digital signal processing chips; radiocommunication; radiowave propagation; real-time systems; AGC units; DSP algorithm; DSP based AGC; HF channel; MFSK modems; Mc-AGC system; channel coding; digital signal processor; fast automatic gain control; propagation analysis; radiowave propagation countermeasures; real-time channel evaluation; signal fading; system management;

fLanguage

English

Publisher

iet

Conference_Titel

HF Radio Systems and Techniques, 1991., Fifth International Conference on

Conference_Location

Edinburgh

Type

conf

Filename

175894