Predicting Spectrum Occupancies Using a Non-stationary Hidden Markov Model

Abstract : One of the critical challenges for secondary use of licensed spectrum is the accurate modeling of primary users' (PUs') stochastic behavior. However, the conventional hidden Markov models (HMMs) assume stationary state transition probability and fail to adequately describe PUs' dwell time distributions. In this letter, we propose a non-stationary hidden Markov model (NS-HMM), in which the time-varying property of PU behavior is realized. A variant of the Baum-Welch algorithm is developed to estimate the parameters of an NS-HMM. Finally, the performance of the proposed model is evaluated through experiments using real spectrum measurement data. The results show that the NS-HMM outperforms existing HMM-based approaches.
Type de document :
Article dans une revue
IEEE wireless communications letters, IEEE comsoc, 2014, 3 (4), pp.2162-2337. 〈10.1109/LWC.2014.2315040〉
Liste complète des métadonnées

https://hal-supelec.archives-ouvertes.fr/hal-01073326
Contributeur : Myriam Andrieux <>
Soumis le : jeudi 9 octobre 2014 - 15:09:07
Dernière modification le : vendredi 16 novembre 2018 - 01:37:38

Identifiants

Citation

Xianfu Chen, Honggang Zhang, Allen B. Mackenzie, Marja Matinmikko. Predicting Spectrum Occupancies Using a Non-stationary Hidden Markov Model. IEEE wireless communications letters, IEEE comsoc, 2014, 3 (4), pp.2162-2337. 〈10.1109/LWC.2014.2315040〉. 〈hal-01073326〉

Partager

Métriques

Consultations de la notice

192