Classificação Automática de Modulação Digital com uso de Correntropia para Ambientes de Rádio Cognitivo
Modern wireless systems employ adaptive techniques to provide high throughput while observing desired coverage, Quality of Service (QoS) and capacity. An alternative to further enhance data rate is to apply cognitive radio concepts, where a system is able to exploit unused spectrum on existing licen...
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| Format: | master thesis |
| Status: | Published version |
| Publication Date: | 2012 |
| Country: | Brasil |
| Institution: | Universidade Federal do Rio Grande do Norte (UFRN) |
| Repository: | Repositório Institucional da UFRN |
| Language: | Portuguese |
| OAI Identifier: | oai:repositorio.ufrn.br:123456789/15452 |
| Online Access: | https://repositorio.ufrn.br/jspui/handle/123456789/15452 |
| Access Level: | Open access |
| Keyword: | Classificação Automática de Modulação. Correntropia. Rádio Cognitivo Classification Automatic Modulation. Correntropy. Radio Cognitive CNPQ::ENGENHARIAS::ENGENHARIA ELETRICA |
| Summary: | Modern wireless systems employ adaptive techniques to provide high throughput while observing desired coverage, Quality of Service (QoS) and capacity. An alternative to further enhance data rate is to apply cognitive radio concepts, where a system is able to exploit unused spectrum on existing licensed bands by sensing the spectrum and opportunistically access unused portions. Techniques like Automatic Modulation Classification (AMC) could help or be vital for such scenarios. Usually, AMC implementations rely on some form of signal pre-processing, which may introduce a high computational cost or make assumptions about the received signal which may not hold (e.g. Gaussianity of noise). This work proposes a new method to perform AMC which uses a similarity measure from the Information Theoretic Learning (ITL) framework, known as correntropy coefficient. It is capable of extracting similarity measurements over a pair of random processes using higher order statistics, yielding in better similarity estimations than by using e.g. correlation coefficient. Experiments carried out by means of computer simulation show that the technique proposed in this paper presents a high rate success in classification of digital modulation, even in the presence of additive white gaussian noise (AWGN) |
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