NDLI: Outage and SEP of secondary user with imperfect channel estimation and primary user interference

Content Provider	IEEE Xplore Digital Library
Author	Prasad, B. Roy, S.D. Kundu, S.
Copyright Year	2014
Description	Author affiliation: Dept. of ECE, NIT Durgapur, Durgapur, India (Prasad, B.; Roy, S.D.; Kundu, S.)
Abstract	Spectrum sharing in a cognitive radio network aims to improve the spectrum efficiency where a secondary user (SU) shares the spectrum band licensed to the primary user causing a limited interference to the PU. However, the performance of a SU will be affected by interference from the PU. In this paper we investigate the impact of PU interference on symbol error probability (SEP) and outage probability of SU under constraint of PU outage. The channel state information (CSI) available at SU is used to estimate the instantaneous transmit power of SU under an acceptable outage constraint of PU, while the SU transmits at the maximum power level $(P_{m})$ during the absence of PU. A power control scheme based on a scaling factor is proposed for SU so as to maintain a desired outage constraint on PU even in case of imperfect CSI. A closed form expression for outage probability of SU under PU interference is developed. A simulation test bed has been developed in MATLAB to assess the performance of SU in terms of SEP and outage probability with imperfect CSI in presence of PU interference. We also highlight the effects of imperfection in CSI on primary outage. Further the effects of constellation size (M) of the transmitted MPSK signal of SU is indicated on the outage and SEP performance of SU.
Starting Page	1
Ending Page	6
File Size	594060
Page Count	6
File Format	PDF
e-ISBN	9781479923175
DOI	10.1109/CONECCT.2014.6740333
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2014-01-06
Publisher Place	India
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Correlation coefficient Symbol error probability Transmitters Error probability Channel estimation Imperfect channel state information Interference Receivers Outage capacity Mathematical model Cognitive radio(CR)
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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