Estimating symbol error rate vs. carrier to noise in IQ modulated systems based on digitization of constellation and statistical models

Author

Klein, Matt

Author_Institution

Hewlett-Packard Co., Palo Alto, CA, USA

Volume

38

Issue

4

fYear

1992

fDate

12/1/1992 12:00:00 AM

Firstpage

229

Lastpage

236

Abstract

Methods used to characterize the degradation of symbol error rate (SER) vs. carrier-to-noise ratio (C/N) performance of several different components of systems that broadcast digital video signals are presented. The techniques are based on repetitively sampling and then digitizing the IQ constellation at baseband. Mathematically different levels of noise calculated relative to the carrier are added to the digitized constellation. Examination of the resulting distributions of noise versus error thresholds allows the estimation of SER vs. C/N in the absence of any error correction in the receiver. The effects of IF bandwidth and transmit and receive filters are also taken into account. The estimated SER vs. C/N can be plotted and compared to the theoretical SER vs. C/N for the modulation format, IF bandwidth, and transmit and receive filters in the system under test

Keywords

amplitude modulation; digital signals; error statistics; television broadcasting; video signals; C/N; IF bandwidth; IQ modulated systems; QAM; SER; TV broadcasting; carrier-to-noise ratio; digital video signals; digitized constellation; error thresholds; modulation format; noise distribution; noise levels; receive filters; sampling; statistical models; symbol error rate; system under test; transmit filters; Bandwidth; Baseband; Degradation; Digital video broadcasting; Error analysis; Error correction; Filters; Modulation; Noise level; Sampling methods;

fLanguage

English

Journal_Title

Broadcasting, IEEE Transactions on

Publisher

ieee

ISSN

0018-9316

Type

jour

DOI

10.1109/11.184725

Filename

184725