Third order distortion in digital receiver front-ends as the dominant interference mechanism above 470 MHz

Author

Rhodes, Charles W.

Author_Institution

Advanced Television Test Center Inc., USA

fYear

2008

fDate

28-30 April 2008

Firstpage

1

Lastpage

4

Abstract

Wireless transmission systems for DTV and data may carry digital information, but the radiated signal is an analog signal supported by amplitude modulation or amplitude & Phase modulation of a (suppressed) carrier as in the 8-VSB modulated ATSC DTV System, DVB-T and ISDB-T which are DTV transmission Standards developed in the USA, Europe and Japan. The analog portion of receiver generally consists of a variable gain RF amplifier, a frequency converter (mixer) driven by a Local Oscillator and an IF Filter and IF amplifier. The amplified IF signal is fed to an Analog-to-Digital converter from which the digital transport stream is available for processing digitally. The analog portion of digital receivers is vulnerable to interference from strong signals on other channels.

Keywords

amplitude modulation; analogue-digital conversion; digital television; frequency convertors; interference (signal); phase modulation; radiofrequency amplifiers; television receivers; 8-VSB modulated ATSC DTV system; DTV transmission standards; IF amplifier; IF filter; amplified IF signal; amplitude modulation; analog signal; analog-to-digital converter; digital information; digital receiver front- ends; digital receivers; digital transport stream; dominant interference mechanism; frequency converter; local oscillator; phase modulation; radiated signal; third order distortion; variable gain RF amplifier; wireless transmission systems; Amplitude modulation; Communication standards; Data communication; Digital TV; Digital modulation; Digital multimedia broadcasting; Digital video broadcasting; Interference; Phase modulation; Radiofrequency amplifiers;

fLanguage

English

Publisher

ieee

Conference_Titel

Devices, Circuits and Systems, 2008. ICCDCS 2008. 7th International Caribbean Conference on

Conference_Location

Cancun

Print_ISBN

978-1-4244-1956-2

Electronic_ISBN

978-1-4244-1957-9

Type

conf

DOI

10.1109/ICCDCS.2008.4542644

Filename

4542644