DocumentCode :
775954
Title :
Error Performance Analysis for Narrow-Band Duobinary FM with Discriminator Detection
Author :
Tjhung, Tjeng T. ; Ng, Chun Sum ; Yeo, Kee Kong ; Wittke, Paul H.
Author_Institution :
National Univ. Singapore, Singapore
Volume :
33
Issue :
5
fYear :
1985
fDate :
5/1/1985 12:00:00 AM
Firstpage :
399
Lastpage :
408
Abstract :
Of the more band-efficient constant envelope digital modulations, duobinary FM is attractive in terms of its potential error performance, as indicated by the minimum distance of the signal structure. In this paper, the error performance of narrow-band duobinary FM, with discriminator detection in an additive Gaussian noise background, is evaluated for a range of system bandwidths BT and frequency deviation ratios h . The effects of intersymbol interference, due to the restricted bandwidth, are taken into account in the analysis. In addition, at the narrower bandwidths, 0.5 \\leq BT < 1.0 , the filtered background noise is correlated, and these effects are included. It is shown that with the usual duobinary detector, "clicks," which are a major contributor to errors in conventional digital FM, do not contribute significantly to errors for the low frequency deviation ratios which are commonly used. The error rate theory agrees well with results obtained experimentally. The deviation ratios that give the best error performance for a given system bandwidth are presented. In a narrower bandwidth such as BT = 1/2 , where duobinary FM is proposed, duobinary FM with a frequency deviation ratio of h = 0.7 performs better than binary FM.
Keywords :
FM; Intersymbol interference; Additive noise; Background noise; Bandwidth; Detectors; Digital modulation; Frequency modulation; Gaussian noise; Intersymbol interference; Narrowband; Performance analysis;
fLanguage :
English
Journal_Title :
Communications, IEEE Transactions on
Publisher :
ieee
ISSN :
0090-6778
Type :
jour
DOI :
10.1109/TCOM.1985.1096316
Filename :
1096316
Link To Document :
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