Concurrent Communication and Sensing in Cognitive Radio Devices: Challenges and an Enabling Solution

Tsakalaki, Elpiniki; Alrabadi, Osama N.; Tatomirescu, Alexandru; Carvalho, Elisabeth de; Pedersen, Gert Frølund

doi:10.1109/tap.2013.2280051

Cited by 24 publications

(19 citation statements)

References 52 publications

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“…In addition to physical layer enhancements discussed above, efficient design of MAC layer To carry out adaptive spatial filtering with an antenna array [25,144,145] …”

Section: Summary and Insightsmentioning

confidence: 99%

“…Following this concept, authors in [144] proposed a spatial filtering approach in order to enable the CST in an FD-CR node. It has been shown that a wideband isolation level of about 60 dB can be obtained by the considered antenna system and by following the spatial filtering stage with active power cancellation in the radio-frequency stage and in the baseband stage, a total isolation greater than about 100 dB can be obtained.…”

Section: Multiple-antenna Based Signal Processingmentioning

confidence: 99%

“…By dividing the total number of antennas into different groups, it may be possible to carry out simultaneous sensing, transmission and reception [25,145]. Furthermore, by employing spatial filtering at the sensing node, transmit signal in the direction of sensing can be nulled out, thus enabling the CST [144]. Also, by using multi-configurable antennas, radiation beam can be controlled dynamically and this will enhance the communication range of FD and also the data rates.…”

Section: E Summary and Insightsmentioning

confidence: 99%

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Dynamic Spectrum Sharing in 5G Wireless Networks With Full-Duplex Technology: Recent Advances and Research Challenges

Sharma

Bogale

et al. 2018

IEEE Commun. Surv. Tutorials

214

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Full-Duplex (FD) wireless technology enables a radio to transmit and receive on the same frequency band at the same time, and it is considered to be one of the candidate technologies for the fifth generation (5G) of wireless communications due to its advantages including potential doubling of the capacity, reduced end-to-end and feedback delays, improved network secrecy and efficiency, and starting with a detailed overview of FD-enabled DSS, we provide a comprehensive survey of recent advances in this domain. We then highlight several potential techniques for enabling FD operation in DSS wireless systems. Subsequently, we propose a novel communication framework to enable CST in DSS systems by employing a power control-based SI mitigation scheme and carry out the throughput performance analysis of this proposed framework. Finally, we discuss some open research issues and future directions with the objective of stimulating future research efforts in the emerging FD-enabled DSS wireless systems.

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“…In addition to physical layer enhancements discussed above, efficient design of MAC layer To carry out adaptive spatial filtering with an antenna array [25,144,145] …”

Section: Summary and Insightsmentioning

confidence: 99%

Section: Multiple-antenna Based Signal Processingmentioning

confidence: 99%

Section: E Summary and Insightsmentioning

confidence: 99%

See 1 more Smart Citation

Dynamic Spectrum Sharing in 5G Wireless Networks With Full-Duplex Technology: Recent Advances and Research Challenges

Sharma

Bogale

et al. 2018

IEEE Commun. Surv. Tutorials

214

View full text Add to dashboard Cite

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“…These works are distinguished into two main types: i) techniques that apply the concept at the SU transmitter side [18]- [21] and ii) techniques that enable the cooperation between the SU transmitter and an inactive SU [16], [22] or between the SU transmitter and the SU receiver via a control channel [23]. These approaches are summarized as follows.…”

Section: Introductionmentioning

confidence: 99%

“…Therefore, the functionality of this method is completely based on the ability to isolate the antennas of the transmit and sensing unit and cancel the selfinterference. In [18], an approach was proposed based on the idea of spatial filtering for achieving a tolerable level of isolation. However, a stronger isolation is required and is obtained by equipping the transmitter with redundant antennas.…”

Section: Introductionmentioning

confidence: 99%

Simultaneous Sensing and Transmission for Cognitive Radios With Imperfect Signal Cancellation

Politis

Maleki

Tsinos

et al. 2017

IEEE Trans. Wireless Commun.

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Abstract-In conventional cognitive radio systems, the secondary user employs a "listen-before-talk" paradigm, where it senses if the primary user is active or idle, before it decides to access the licensed spectrum. However, this method faces challenges with the most important being the reduction of the secondary user's throughput, as no data transmission takes place during the sensing period. In this context, the idea of simultaneous spectrum sensing and data transmission is proposed. The present work studies a system model where this concept is obtained through the collaboration of the secondary transmitter with the secondary receiver. First, the secondary receiver decodes the signal from the secondary transmitter, subsequently, removes it from the total received signal and then, carries out spectrum sensing in the remaining signal in order to decide about the presence/absence of the primary user. Different from the existing literature, this paper takes into account the imperfect signal cancellation, evaluating how the decoding errors affect the sensing reliability and derives the analytical expressions for the probability of false alarm. Finally, numerical results are presented illustrating the accuracy of the proposed analysis.

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Coexistence of LTE and WLAN in Unlicensed Bands: Full-Duplex Spectrum Sensing

Syrjälä

Valkama

2015

Lecture Notes of the Institute for Computer Sciences, Social Informatics and Telecommunications Engineering

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Concurrent Communication and Sensing in Cognitive Radio Devices: Challenges and an Enabling Solution

Cited by 24 publications

References 52 publications

Dynamic Spectrum Sharing in 5G Wireless Networks With Full-Duplex Technology: Recent Advances and Research Challenges

Dynamic Spectrum Sharing in 5G Wireless Networks With Full-Duplex Technology: Recent Advances and Research Challenges

Simultaneous Sensing and Transmission for Cognitive Radios With Imperfect Signal Cancellation

Coexistence of LTE and WLAN in Unlicensed Bands: Full-Duplex Spectrum Sensing

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