2014
DOI: 10.2498/cit.1002419 View full text |Buy / Rent full text
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Abstract: In this paper, we investigate the energy efficiency and throughput optimization problem of cognitive relay networks. We propose to design sensing time and signal to noise ratio (SNR) to maximize the energy efficiency and throughput, since analytical and empirical studies have shown that sensing time and SNR are key factors for energy efficiency and throughput. We design a method that simultaneously considers the parameters of spectrum sensing time and SNR to optimize the energy efficiency of cognitive radio ne… Show more

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“…According to the energy efficiency definition in [ 28 ], we can express the energy efficiency for a two-way satellite-terrestrial network as follows: …”
Section: System Performance Analysismentioning
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“…According to the energy efficiency definition in [ 28 ], we can express the energy efficiency for a two-way satellite-terrestrial network as follows: …”
Section: System Performance Analysismentioning
“…The PU is occupied but the SU detects it to be available (i.e., miss detection). SUs make efforts to achieve both sensing and transmission, but they still suffer serious collisions with the PU during the transmission as they share the same band; then, the total energy cost 𝐸𝐸 𝑆𝑆0 is calculated as (5):…”
Section: Energy Efficiency Analysismentioning
“…The sensing technique, however, requires high detection performance [1][2][3] and good coordination between the PU and SUs [3,4]. Besides, the energy efficiency (EE) of cognitive radio networks (CRNs) has attracted a great deal of research attention recently, especially in the context of the tradeoff of sensing and the transmission time ratio [5][6][7][8][9][10][11][12][13][14][15][16]. Since the PU and SUs share the same spectrum band, the analysis of their transmission powers becomes a critical issue in CRNs.…”
Section: Introductionmentioning
“…However, spectrum waste of CSS should be considered with SU's actual sensing effort (i.e. the sensing time ratio [74]). Therefore, the energy should always be compensated for the spectrum waste to guarantee the performance.…”
Section: Technical Points Reference Examplesmentioning