The Use of Rateless Coding Technique in Cognitive Radio Networks Based on Primary User Channel Occupancy Modeling
محل انتشار: پنجمین کنفرانس ملی مهندسی برق و الکترونیک ایران
سال انتشار: 1392
نوع سند: مقاله کنفرانسی
زبان: انگلیسی
مشاهده: 1,147
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شناسه ملی سند علمی:
ICEEE05_413
تاریخ نمایه سازی: 3 آذر 1392
چکیده مقاله:
In this paper, we investigate the channel selection technique in secondary user communication in cognitive radio network using rateless codes. In order to increase the tolerance of interference from the primary user appearance, also considering losses caused by collision between several secondary users, each secondary user uses rateless codes. We model the primary user occupancy and interference dynamics of a channel, which is used by a secondary user, using a Hidden Markov Model (HMM). The HMM is trained using Baum-Welch procedure and each secondary user uses a trained HMM to predict the primary user channel occupancy in future time slots and compute the Channel Availability Metric (CAM) for the channel. CAM is used by secondary user to select a preferable primary user channel for its communication. Simulation results, demonstrate the efficiency of the proposed channel selection technique in secondary user communication
کلیدواژه ها:
نویسندگان
Iman Pourmohammadi
Birjand University
Hamid Farrokhi
Birjand University