Front-end of a digital ATV receiver

Author

Sinyanskiy, Viktor ; Cukier, Johnas ; Davidson, Alex ; Poon, Tom

Author_Institution

ATV Lab., Mitsubishi Electr. Inf. Technol. Center America, New Providence, NJ, USA

Volume

44

Issue

3

fYear

1998

fDate

8/1/1998 12:00:00 AM

Firstpage

817

Lastpage

822

Abstract

This paper describes the front-end of a digital ATV receiver. The front-end contains a tuner, a surface acoustic wave (SAW) filter, a downconverter, a vestigial sideband (VSB) demodulator, an analog-to-digital converter (ADC), and an on-board microprocessor. The signal level at the input of the ATV receiver, in the case of a terrestrial broadcast, can change by more than 80 dB. The level of the input signal can change rapidly due to plane jitter or dynamic ghost interference. The performance of the ATV receiver depends heavily on the accuracy and reaction time of the automatic gain control (AGC) system. The concept and algorithm for a digital delayed AGC was developed and investigated. A digital delayed AGC algorithm was implemented using an on-board microprocessor with data supplied by the VSB demodulator´s AGC output. The front-end board was tested in the lab and in the field with real terrestrial ATV broadcasts and some of the results are presented

Keywords

automatic gain control; digital television; high definition television; microprocessor chips; television receivers; ADC; AGC; SAW filter; analog-to-digital converter; automatic gain control; digital ATV receiver; downconverter; dynamic ghost interference; front-end; input signal; on-board microprocessor; performance; plane jitter; signal level; surface acoustic wave filter; terrestrial broadcast; tuner; vestigial sideband demodulator; Acoustic waves; Analog-digital conversion; Delay; Demodulation; Filters; HDTV; Jitter; Microprocessors; Surface acoustic waves; Tuners;

fLanguage

English

Journal_Title

Consumer Electronics, IEEE Transactions on

Publisher

ieee

ISSN

0098-3063

Type

jour

DOI

10.1109/30.713199

Filename

713199