2014
DOI: 10.1109/tcomm.2014.2325041
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Hybrid Interweave-Underlay Spectrum Access for Cognitive Cooperative Radio Networks

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Cited by 51 publications
(29 citation statements)
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“…For instance, in Chakravarthy et al, a cognitive user transmits the data bits over the unused frequency bands by using the overlay method and transmits the redundant bits (ie, parity bits) over the underutilized frequency bands by using the underlay method. Most of the previous works on hybrid methods have reveal that these methods always outperform the overlay and underlay access methods while neglecting the recursive effects between PUs and SUs. For instance, the interference caused by an SU due to sensing errors in the overlay method or the interference generated in the underlay method due to ITL violation could degrade the PU's performance.…”
Section: Spectrum Access Methodsmentioning
confidence: 99%
See 1 more Smart Citation
“…For instance, in Chakravarthy et al, a cognitive user transmits the data bits over the unused frequency bands by using the overlay method and transmits the redundant bits (ie, parity bits) over the underutilized frequency bands by using the underlay method. Most of the previous works on hybrid methods have reveal that these methods always outperform the overlay and underlay access methods while neglecting the recursive effects between PUs and SUs. For instance, the interference caused by an SU due to sensing errors in the overlay method or the interference generated in the underlay method due to ITL violation could degrade the PU's performance.…”
Section: Spectrum Access Methodsmentioning
confidence: 99%
“…In the same vain, Xia and Aissa addressed the problem of short range communication and proposed a cooperative amplify‐and‐forward relaying scheme based on an underlay access technique. Chu et al investigated the hybrid interweave‐underlay technique of spectrum access, which uses the amplify‐and‐forwarding relay scheme. A continuous‐time Markov chain is use to model the proposed cooperative cognitive network based on different network parameters such as outage probability, outage capacity, and symbol error rate.…”
Section: Related Workmentioning
confidence: 99%
“…У дослідженнях [11,13,19] було частково вирішено цю проблему. У розробці методу вибору каналів когнітивного радіо при мно-жинному доступі первинних і вторинних користува-чів під керуванням нейронної мережі дані будуть збиратися, аналізуватися і об'єднуватися для більш точного моделювання.…”
Section: H X T N T H X T S T N Tunclassified
“…На рисунку 1 показано мережу з великою кількістю первинних та вторин-них користувачів, де кожному первинному користу-вачеві виділено ліцензований канал («ПК-канал»). Як і в [9][10][11], трафік кожного каналу моделюється як марківський процес безперервний у часі. Такий процес має два стани -вільного і зайнятого спект-ру, що для первинного користувача відповідає включеному та виключеному стану.…”
unclassified
“…Techniques for adjusting secondary transmit powers to meet the interference power constraint of the primary receiver in underlay CRNs are presented in [5] while collaborative spectrum sensing techniques for interweave CRNs are studied in [6]. Dealing with the overlay scheme, the authors of [7] proposed a power allocation for CRNs to achieve maximum rate whereas a hybrid scheme was deployed in [8] to inherit the benefits of the interweave and underlay schemes.…”
Section: Introductionmentioning
confidence: 99%