Wide-Band Sensing and Optimization for Cognitive Radio Networks With Noise Variance Uncertainty
نویسندگان
چکیده
منابع مشابه
Sensing Optimization in Cooperative Cognitive Radio Networks
Cooperative spectrum sensing is a key function in cognitive radio networks in order to provide unused spectrum access opportunities and mitigate the impact of interference to the primary networks. Cooperative sensing can incur additional cooperation overhead, increased energy consumption, extra sensing time and delay in heterogeneous networks. In this paper, the sensing time period is optimized...
متن کاملEnhanced Out-of-Band Sensing Algorithm for Cognitive Radio Networks
In cognitive radio networks (CRN), Out-of-Band (OoB) spectrum sensing provides seamless communication. Cognitive radio (CR) users, so called secondary users (SUs), should avoid interference with primary users (PUs), the owner of the licensed band, while trying to access the unused licensed or unlicensed band, for spectrum utilization. When PUs request to access their band, SUs need to vacate th...
متن کاملCapacity Optimization through Sensing Threshold Adaptation for Cognitive Radio Networks
In this paper we propose the capacity optimization over sensing threshold for sensingbased cognitive radio networks. The objective function of the proposed optimization is to maximize the capacity at the secondary user subject to the constraints on the transmit power and the sensing threshold in order to protect the primary user. The defined optimization problem is a convex optimization over th...
متن کاملSpectrum sensing in cognitive radio networks: Performance evaluation and optimization
This paper studies cooperative spectrum sensing in cognitive radio networks where secondary users collect local energy statistics and report their findings to a secondary base station, i.e., a fusion center. First, the average error probability is quantitively analyzed to capture the dynamic nature of both observation and fusion channels, assuming fixed amplifier gains for relaying local statis...
متن کاملInter-Sensing Time Optimization in Cognitive Radio Networks
We consider a set of primary channels that operate in an unslotted fashion, switching activity at random times. A secondary user senses the primary channels searching for transmission opportunities. If a channel is sensed to be free, the secondary terminal transmits, and if sensed to be busy, the secondary transmitter remains silent. We solve the problem of determining the optimal time after wh...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: IEEE Transactions on Communications
سال: 2015
ISSN: 0090-6778
DOI: 10.1109/tcomm.2015.2394390