Cooperative spectrum sharing with multi-antenna based adaptive hybrid relay

Bhattacherjee, Subhra Shankha; Saha, Animesh; De, Chanchal Kumar; De, Debasis

doi:10.1109/wispnet.2017.8300055

Cited by 3 publications

(2 citation statements)

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“…15 Authors previous studies 16,17 give a fantastic explanation on proactive and reactive DF relaying schemes. 18,19 A brief DF relaying schemes were also described in Zhong et al 20 Optimal power allocation algorithm has been developed for a hybrid underlay/overlay OFDM-based CR network in previous studies. 12,21 The aforementioned works [8][9][10][11][12] on combination of underlay and overlay mode in CR networks do not use the multiantennabased proactive DF relaying protocol.…”

Section: Introductionmentioning

confidence: 99%

“…A classical idea of using cluster‐based spectrum sensing and access techniques under hybrid overlay/underlay CR network through optimal relay selection scheme has been proposed Rajaganapathi and Nathan 15 . Authors previous studies 16,17 give a fantastic explanation on proactive and reactive DF relaying schemes 18,19 . A brief DF relaying schemes were also described in Zhong et al 20 Optimal power allocation algorithm has been developed for a hybrid underlay/overlay OFDM‐based CR network in previous studies 12,21 .…”

Section: Introductionmentioning

confidence: 99%

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A smart spectrum utilization approach using multiantenna‐based cognitive relays in cognitive radio network

Samanta

Bag

et al. 2020

Int J Communication

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SummaryEfficient spectrum utilization is a promising technique for a prolonged unused radio frequency (RF) spectrum in a wireless network. In this paper, an adaptive spectrum sharing cognitive radio (CR) network has been proposed consisting of a primary user (PU) and secondary user transmitter (SU − Tx) that communicates with secondary user receiver (SU − Rx) via multiantenna‐based proactive decode‐and‐forward (DF) relay selection scheme. In our model, strategically an adaptable joint venture on underlay/overlay protocol is defined based on channel occupancy using spectrum sensing technique. Here, secondary transmitters (i.e., source transmitter) continuously sense the PU activities by energy detector and can simultaneously transmit to secondary receivers. Depending on sensing result secondary transmitters automatically switches in underlay mode if PU is active otherwise operates in overlay mode. The advantage of this scheme is that the joint mode of transmission allows the SUs to maximize their transmission rate. The outage performance at SU − Rx and closed‐form expressions of joint underlay/overlay protocol has been evaluated. The power control policies at different transmitter nodes are taken care of. With the same diversity order, a trade‐off between multiantenna and multirelay is shown. This comparison shows improvement in outage behavior when the count in relays surpasses the number of antennas. Finally, the analytical model of smart efficient spectrum utilization without harming license users in CR is validated by MATLAB simulation.

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