| Revista: | Journal of applied research and technology |
| Base de datos: | PERIÓDICA |
| Número de sistema: | 000377657 |
| ISSN: | 1665-6423 |
| Autores: | Lee, Ying Loong1 Saad, Wasan Kadhim2 El-Saleh, Ayman Abd1 Ismail, Mahamod2 |
| Instituciones: | 1Multimedia University, Faculty of Engineering, Cyberjaya, Selangor. Malasia 2Universiti Kebangsaan Malaysia, Faculty of Engineering and Built Environment, Bangi, Selangor. Malasia |
| Año: | 2013 |
| Periodo: | Jun |
| Volumen: | 11 |
| Número: | 3 |
| Paginación: | 437-446 |
| País: | México |
| Idioma: | Inglés |
| Tipo de documento: | Artículo |
| Enfoque: | Experimental, aplicado |
| Resumen en inglés | Cognitive radios (CRs) have been recently emerging as prime candidates to enhance spectral efficiency by exploiting spectrum-aware systems which can reliably monitor licensed users' activities. CR users monitor such activities by performing spectrum sensing to detect potential white spaces. However, this process of local sensing might be a challenging task in fading environments. The inefficiency of spectrum sensing might cause interference to licensees if they are miss-detected by CR users. Thus, cooperative spectrum sensing is proposed as a means to combat fading and improve the detection performance. However, the detection performance does not improve by such cooperation when low-SNR environment is considered. In this paper, cooperative spectrum sensing with PSO-based threshold adaptation is presented to address the aforementioned problem. Simulation results show that the detection performance with PSO-based adaptive detection threshold is improved, particularly, in low-SNR environment |
| Disciplinas: | Ingeniería, Ciencias de la computación |
| Palabras clave: | Ingeniería de telecomunicaciones, Radio cognitiva, Espectro cooperativo, Adaptación dinámica del umbral, Optimización por enjambre de partículas |
| Keyword: | Engineering, Computer science, Telecommunications engineering, Cognitive radio, Cooperative spectrum, Dynamic threshold adaptation, Particle swarm optimization |
| Texto completo: | Texto completo (Ver HTML) |
