Joint Sensing and Transmission for AF Relay Assisted PU Transmission in Cognitive Radio Networks

Yin, Wenshan; Ren, Pinyi; Li, Fan; Du, Qinghe

doi:10.1109/jsac.2013.131116

Cited by 13 publications

(4 citation statements)

References 27 publications

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“…Lemma 1: If holds for , then is not related to and is an increasing function over for any . Proof: In this case, the partial derivative of over can be computed as (23) Redefining…”

Section: A Power-mask Effect Of Sensing Strategy-imentioning

confidence: 99%

“…There are also quite a number of works discussing different issues of CR over the past decade, for example, parameter uncertainty based spectrum sensing [17], design with imperfect sensing [18], sensing throughput tradeoff [19], spectrum sharing [20], as well as many other hybrid schemes between CR and other technologies, e.g., games among SUs [21], sensing in OFDM system [22], sensing in relay network [23], [24], sensing with MAC layer protocol [25] and so on.…”

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confidence: 99%

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Sensing and Recognition When Primary User Has Multiple Transmit Power Levels

Gao

Jiang

et al. 2015

IEEE Trans. Signal Process.

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In this paper, a new cognitive radio (CR) scenario called Multiple Primary Transmit Power (MPTP) is investigated where the primary user (PU) could possibly work on more than one discrete transmit power levels. Different from most existing literatures where PU is assumed to operate with a constant transmit power only, this new consideration well matches the practical standards, e.g., IEEE 802.11 Series, GSM, LTE, LTE-A, etc., as well as the adaptive powering concept that a user would vary its transmit power under different situations. The primary target of CR under MPTP may still be detecting the presence of PU. However, there emerges a secondary target as to identify the PU's transmit power level. Compared to the existing sensing strategy where the secondary user (SU) only detects the "on-off" status of PU, recognizing the transmit power level of PU achieves more "cognition" and makes the CR more intelligent. Meanwhile, SU could utilize the power level information of PU and make the subsequent design. We derive quite many closed-form results for either the threshold expressions or the performance analysis in this new CR scenario, from which many interesting points and discussions are raised. We then study the cooperative sensing schemes under MPTP and demonstrate their significant differences from traditional cooperative algorithms. Lastly, numerical examples are provided to corroborate the proposed studies. Index Terms-Cooperative sensing, majority decision, modified multiple hypothesis testing, multiple primary transmit power (MPTP), power-mask, spectrum sensing. I. INTRODUCTIONC OGNITIVE RADIO (CR) has been recognized as a promising solution to spectrum scarcity and spectrum under-utilization [1] by allowing the secondary users (SUs) to

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“…Lemma 1: If holds for , then is not related to and is an increasing function over for any . Proof: In this case, the partial derivative of over can be computed as (23) Redefining…”

Section: A Power-mask Effect Of Sensing Strategy-imentioning

confidence: 99%

mentioning

confidence: 99%

Sensing and Recognition When Primary User Has Multiple Transmit Power Levels

Gao

Jiang

et al. 2015

IEEE Trans. Signal Process.

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“…Hence, the harvested energy at the EH receiver can be computed from Q = ζ |gs| 2 + |gw| 2 , where ζ is a constant that accounts for the efficiency in the energy conversion. Interestingly, the energy limit Q is very similar to the interference limit in cognitive radio (CR) [30][31][32][33][34], where the interference should be controlled to be below a predefined value.…”

Section: Endnotesmentioning

confidence: 99%

Zero-forcing beamforming for physical layer security of energy harvesting wireless communications

Zhu

Gao

Mao

2015

J Wireless Com Network

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In this paper, we consider the physical layer security for simultaneous wireless information and power transfer (SWIPT) in a multiple-input single-output (MISO) system that is consisted of three nodes: one transmitter with multiple antennas, one information decoding (ID) receiver with single antenna, and one energy harvesting (EH) receiver with single antenna. We propose a new zero-forcing based strategy that contains both the information beamforming and the energy beamforming, pointing to different receivers. To prevent the energy receiver from possibly eavesdropping the information, our target is to maximize the secrecy-rate of the ID receiver while at the same time maintaining a minimum required energy for the EH receiver. For the case that artificial noise is not used, the original non-convex problem can be directly converted into convex subproblems, where the closed-form optimal solutions are derived. For the case that artificial noise is used, the initial non-convex problem can be decomposed into two quasi-convex subproblems where closed-form solutions are derived, and the global optimal solutions are obtained with the aid of one-dimensional search. Simulations results demonstrate the trade-off between the maximum secret information rate and the transferred energy, which is characterized by the boundary of secret rate-energy (R-E) region.

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“…Hence, simultaneous reception and transmission in the same frequency band, i.e., full-duplex communication, can potentially double the throughput of half-duplex mode. Besides, full-duplex mode has advantages in overcoming thorny problems, such as hidden terminals, high end-to-end delays [1], and spectrum sensing in cognitive radio [2]. Due to these significant advantages, full-duplex communications have been attracting an increasing amount of research interest [3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19][20].…”

Section: Introductionmentioning

confidence: 99%

Self-mixed self-interference analog cancellation in full-duplex communications

Shao

Deng

et al. 2016

Sci. China Inf. Sci.

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Performance of auxiliary antenna-based self-interference cancellation in full-duplex radios SCIENCE CHINA Information Sciences 61, 109307 (2018); Full-Duplex Two-way AF Relaying Systems with Imperfect Interference Cancellation in Nakagami-m Fading Channels SCIENCE CHINA Information Sciences Key techniques research on full-duplex wireless communications SCIENTIA SINICA Informationis 44, 951 (2014);

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Joint Sensing and Transmission for AF Relay Assisted PU Transmission in Cognitive Radio Networks

Cited by 13 publications

References 27 publications

Sensing and Recognition When Primary User Has Multiple Transmit Power Levels

Sensing and Recognition When Primary User Has Multiple Transmit Power Levels

Zero-forcing beamforming for physical layer security of energy harvesting wireless communications

Self-mixed self-interference analog cancellation in full-duplex communications

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