NDLI: Cognitive spectrum sharing with bi-directional secondary system

Content Provider	IEEE Xplore Digital Library
Author	Qiang Li Pandharipande, A. Xiaohu Ge
Copyright Year	2014
Description	Author affiliation: Philips Res., Eindhoven, Netherlands (Pandharipande, A.) \|\| Huazhong Univ. of Sci. & Technol., Wuhan, China (Qiang Li; Xiaohu Ge)
Abstract	A cognitive spectrum sharing protocol based on the two-path relay channel is proposed in this paper, where a primary transmitter keeps transmitting new messages to a corresponding receiver and two secondary users alternately decode-and-forward (DF) the primary messages. Upon successful decoding of the primary message, each secondary user superimposes its own message on the relayed message through a certain power allocation. Otherwise, the secondary user simply stays silent. In view of the memorylessness that the DF process at a secondary user in the current time slot depends on the DF process at the other secondary user in the previous time slot, a Markov framework is proposed to analyze the state transitions between staying silent and accessing the spectrum of the secondary users. Based on this framework, the outage probability and throughput are characterized for the primary and secondary users respectively. Our results demonstrate that with a prudential power allocation, the performance of the primary users can be significantly improved and bi-directional communications between two secondary users can be facilitated simultaneously.
Starting Page	13
Ending Page	18
File Size	151275
Page Count	6
File Format	PDF
ISBN	9781631900037
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2014-06-02
Publisher Place	Finland
Access Restriction	Subscribed
Rights Holder	ICST
Subject Keyword	Markov chain cooperative relaying Protocols Interference Markov processes bidirectional secondary system Silicon Decoding Spectrum sharing Resource management Relays
Content Type	Text
Resource Type	Article

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4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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