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scientific master's theses
Klasifikacija linearnih diskretnih modulacija temeljena na statistici višeg reda
Zagreb: University of Zagreb, Faculty of Electrical Engineering and Computing, 2002. urn:nbn:hr:168:162810
Čular, Ema
University of Zagreb
Faculty of Electrical Engineering and Computing
Department of Communication and Space Technologies

Institutional repository: FER Repository

Cite this document

Čular, E. (2002). Klasifikacija linearnih diskretnih modulacija temeljena na statistici višeg reda (Scientific master's theses). Zagreb: University of Zagreb, Faculty of Electrical Engineering and Computing. Retrieved from https://urn.nsk.hr/urn:nbn:hr:168:162810

Čular, Ema. "Klasifikacija linearnih diskretnih modulacija temeljena na statistici višeg reda." Scientific master's theses, University of Zagreb, Faculty of Electrical Engineering and Computing, 2002. https://urn.nsk.hr/urn:nbn:hr:168:162810

Čular, Ema. "Klasifikacija linearnih diskretnih modulacija temeljena na statistici višeg reda." Scientific master's theses, University of Zagreb, Faculty of Electrical Engineering and Computing, 2002. https://urn.nsk.hr/urn:nbn:hr:168:162810

Čular, E. (2002). 'Klasifikacija linearnih diskretnih modulacija temeljena na statistici višeg reda', Scientific master's theses, University of Zagreb, Faculty of Electrical Engineering and Computing, accessed 02 June 2024, https://urn.nsk.hr/urn:nbn:hr:168:162810

Čular E. Klasifikacija linearnih diskretnih modulacija temeljena na statistici višeg reda [Scientific master's theses]. Zagreb: University of Zagreb, Faculty of Electrical Engineering and Computing; 2002 [cited 2024 June 02] Available at: https://urn.nsk.hr/urn:nbn:hr:168:162810

E. Čular, "Klasifikacija linearnih diskretnih modulacija temeljena na statistici višeg reda", Scientific master's theses, University of Zagreb, Faculty of Electrical Engineering and Computing, Zagreb, 2002. Available at: https://urn.nsk.hr/urn:nbn:hr:168:162810

Metadata
TitleKlasifikacija linearnih diskretnih modulacija temeljena na statistici višeg reda
Title (english)Linear Discrete Modulations Classification Based on Higher-order Statistics
AuthorEma Čular
MentorBorivoj Modlic (mentor)
Committee memberVjekoslav Sinković (predsjednik povjerenstva)
Committee memberBorivoj Modlic (član povjerenstva)
Committee memberMiljenko Huzak (član povjerenstva)
GranterUniversity of Zagreb
Faculty of Electrical Engineering and Computing
(Department of Communication and Space Technologies)
Zagreb
Defense date and country2002-10-29, Croatia
Scientific / art field,
discipline and subdiscipline		TECHNICAL SCIENCES
Electrical Engineering
Radio Communications
Universal decimal classification
(UDC)		621.3 - Electrical engineering
Abstract
U ovom radu istražene su mogućnosti klasifikacije linearno diskretno moduliranih signala metodama oslonjenim na statistiku višeg reda. U tu svrhu postavljen je jedinstveni matematički model signala. Analizirane su korelacijske funkcije momenta i kumulanta višeg reda kompleksnog modulacijskog signala u diskretnom modelu u njegovom ciklostacionarnom opisu. Postavljen je klasifikacijski postupak koji se temelji na izravnoj procjeni kumulanata četvrtog reda digitalnog modulacijskog znaka. Postupak je osobit po tome što ne zahtijeva poznavanje valnog oblika modulacijskog simbola. Eksperimentalni rezultati na sintetičkim signalima sa superponiranim uskopojasnim Gaussovim šumom za četiri različita valna oblika modulacijskog simbola potvrđuju da je klasifikator primjenjiv čak i u slučaju interferencije među simbolima. Procjena momenata vršena je usrednjavanjem preko polifaznih komponenti signala. Točnost klasifikatora bolja je za modulacijske postupke s manje stanja u dijagramu, a degradira se s pogoršanjem odnosa signal/šum. Klasifikator vrlo dobro raspoznaje osnovne grupe klasifikacijskih postupaka (MPSK, MASK, MQAM s kvadratnim i MQAM s križnim dijagramom stanja).
Abstract (english)
We consider classification of linear digitally modulated signals based on the higher order statistics. The uniquely model of signal is established. Moment and cumulant based higher order correlation functions of complex envelope in cyclostacionary description are analyzed. We propose the method for modulation classification based on the direct estimation of fourth-order cumulants of digital modulation symbols. We hold this method original because the pulse shape is assumed to be unknown. Simulation results with various types of modulation corrupted by additive narrowband Gaussian noise and with four various pulse shapes confirms that classifier is usable even when ISI is presented. Estimation of moments is performed by averaging through polyphase components. The classifier performances are better for modulation types with simpler constellation diagrams and degrade with signal to-noise ratio. The high discrimination between main modulation groups (MPSK, MASK, square constellation QAM and cross constellation QAM) is achieved.
Keywords
Keywords (english)
Languagecroatian
URN:NBNurn:nbn:hr:168:162810
Study programmeTitle: Postgraduate master programme in electrical engineering
Study programme type: university
Study level: postgraduate
Academic / professional title: Magistar znanosti elektrotehnike (Magistar znanosti elektrotehnike)
Type of resourceText
File originBorn digital
Access conditionsClosed access
Terms of useLicence In copyright icon
Created on2019-04-30 07:47:57