Title :
Wide dynamic range automatic gain control using feed forward and backward technique
Author :
Mughal, F.A. ; Sultan, Farooq ; Imran, Muhammad
Author_Institution :
Centres of Excellence in Sci. & Appl. Technol. (CESAT), Islamabad, Pakistan
Abstract :
This papers deals with implementation of software algorithm of an AGC technique having wide dynamic control range in burst communication. The proposed AGC mechanism consists of a microcontroller with built in ADC, pre & post attenuators, VGA and a RMS detector. Typically, RMS detectors are available with limited dynamic control range of 50-55 dB i.e., either from -10 to -60dBm or -30 to -80dBm. In this work, the dynamic range of such RMS detector has been widened by making an efficient use of pre attenuator. Dynamic range of 80dBis achieved using the proposed technique.
Keywords :
automatic gain control; control engineering computing; feedforward; microcontrollers; radio networks; telecommunication computing; telecommunication control; AGC technique; RMS detectors; backward technique; burst communication; dynamic control range; feed forward technique; gain -10 dB to -60 dB; gain -30 dB to -80 dB; gain 50 dB to 55 dB; gain 80 dB; microcontroller; post attenuators; pre attenuators; radio system; software algorithm; wide dynamic range automatic gain control; Antenna feeds; Attenuation; Attenuators; Hardware; Microcontrollers; Radio frequency; Receivers; Analog to digital convertor (ADC); Automatic gain control (AGC); microcontroller;
Conference_Titel :
Applied Sciences and Technology (IBCAST), 2013 10th International Bhurban Conference on
Conference_Location :
Islamabad
Print_ISBN :
978-1-4673-4425-8
DOI :
10.1109/IBCAST.2013.6512191
