Adaptive Rate and Power Transmission in Spectrum-Sharing Systems

Asghari, Vahid; Aı̈ssa, Sonia

doi:10.1109/twc.2010.090210.100291

Cited by 103 publications

(79 citation statements)

References 21 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In [11], optimization of capacity of cognitive radio spectrum depend on the number of secondary user and power of secondary user which varies with channel characteristic and usage of spectrum band by primary user. By using joint average interference power and peak transmit power , maximum capability of secondary user is obtained on fading channels and also in multiple quadrature amplitude modulation.…”

Section: Survey Of Relevant Literaturementioning

confidence: 99%

Overview of Cognitive Radio Networks

Berwal¹,

Sindhu²

2017

ijarcs

View full text Add to dashboard Cite

In today's era, there is rapid increase in use of wireless technologies. The main backbone of wireless technology is radio spectrum. As radio spectrum is allocated to the fixed users due to which it becomes sometimes underutilized and sometimes scarce. To efficiently use the spectrum bands, Cognitive radio (CR) technology was developed which adapts to the real-time changes in the parameters without causing any interference to other networks. Cognitive radio network helps to allocate the bands to the unlicensed users too when they are not used by the fixed (licensed) users. This paper gives an overview of the CR networks.

show abstract

Section: Survey Of Relevant Literaturementioning

confidence: 99%

Overview of Cognitive Radio Networks

Berwal¹,

Sindhu²

2017

ijarcs

View full text Add to dashboard Cite

show abstract

“…The power control for systems with single PU pair and single SU pair have been investigated in [77][78][79][80]. In [77], different kinds of capacity for the SU system, such as the ergodic, outage, and minimum-rate, are determined for Rayleigh fading environments under both peak and average IPCs.…”

Section: Single-carrier and Single-antenna Systemsmentioning

confidence: 99%

“…It is shown that the average IPCs can provide higher capacities than the peak average IPCs. If the statistics of any sensing metric conditioned on the PU being ON/OFF are known a priori to the SU transmitter, optimal power control schemes [79] and adaptive rate and power control schemes [80] have been proposed to maximize SU system capacity subject to average IPCs and peak TPCs. The system throughput can be improved using soft information.…”

Section: Single-carrier and Single-antenna Systemsmentioning

confidence: 99%

Ten years of research in spectrum sensing and sharing in cognitive radio

Zhou

Onunkwo

et al. 2012

J Wireless Com Network

216

117

View full text Add to dashboard Cite

Cognitive radio (CR) can successfully deal with the growing demand and scarcity of the wireless spectrum. To exploit limited spectrum efficiently, CR technology allows unlicensed users to access licensed spectrum bands. Since licensed users have priorities to use the bands, the unlicensed users need to continuously monitor the licensed users' activities to avoid interference and collisions. How to obtain reliable results of the licensed users' activities is the main task for spectrum sensing. Based on the sensing results, the unlicensed users should adapt their transmit powers and access strategies to protect the licensed communications. The requirement naturally presents challenges to the implementation of CR. In this article, we provide an overview of recent research achievements of including spectrum sensing, sharing techniques and the applications of CR systems.

show abstract

“…In [22] a spectrum sharing scheme based on the interference and power control mechanism is proposed. The author introduces a variable rate and power allocation scheme where each CR user on different channels has the different amount of transmission power and data rate.…”

Section: Related Studymentioning

confidence: 99%

Fair, efficient, and power-optimized spectrum sharing scheme for cognitive radio networks

Aslam

Lee

2011

J Wireless Com Network

View full text Add to dashboard Cite

The cognitive radio network (CRN) is a promising solution to the problem of spectrum scarcity. To achieve efficient spectrum utilization, cognitive radio requires a robust spectrum sensing and spectrum sharing scheme. Therefore, spectrum sharing scheme plays a key role in achieving the optimal utilization of the available spectrum. The spectrum sharing in CRN is more challenging than traditional wireless network. The main factors besides throughput and fairness which need to be addressed in spectrum sharing of CRN are primary user (PU) activity, transmission power, and variations in the radio environment. In this article, we propose fair, efficient, and poweroptimized (FEPO) spectrum sharing scheme that will incorporate all critical factors mentioned above to maximize the spectrum utilization. Simulation results show that FEPO scheme outperforms in terms of transmission power by reducing the number of retransmissions and guarantees required level of throughput and fairness. Moreover, periodic monitoring helps to reduce the number of collisions with PUs.

show abstract

Adaptive Rate and Power Transmission in Spectrum-Sharing Systems

Cited by 103 publications

References 21 publications

Overview of Cognitive Radio Networks

Overview of Cognitive Radio Networks

Ten years of research in spectrum sensing and sharing in cognitive radio

Fair, efficient, and power-optimized spectrum sharing scheme for cognitive radio networks

Contact Info

Product

Resources

About