scholarly journals Performance Tradeoff Analysis of Hybrid Signaling SWIPT Systems with Nonlinear Power Amplifiers

Electronics ◽  
2021 ◽  
Vol 10 (11) ◽  
pp. 1364
Author(s):  
Linlin Chen ◽  
Xiaofang Wu ◽  
Xin Wang ◽  
Wen Qi ◽  
Xuemin Hong ◽  
...  
Keyword(s):  
Energy Transfer ◽  
Power Amplifiers ◽  
Communication Systems ◽  
Wireless Communication Systems ◽  
Signal To Noise ◽  
Transmitter Power ◽  
Information Signal ◽  
Energy Signal ◽  
Rf Signal ◽  
Performance Tradeoff

Simultaneous wireless information and power transfer (SWIPT) is a promising technology to achieve wide-area energy transfer by sharing the same radio frequency (RF) signal and infrastructure of legacy wireless communication systems. To enlarge the effective range of energy transfer in practice, it is desirable to have a hybrid signaling SWIPT scheme, which combines a high-power multitone energy signal with a low-power broadband information signal. This paper presents a systematic study on the performance of hybrid signaling SWIPT systems with memoryless nonlinear transmitter power amplifiers (PAs). Using PA efficiency and signal-to-noise-and-distortion ratio (SNDR) as the metrics to measure the efficiency of energy transfer and information transmission, respectively, we derive the tradeoff between these two metrics for two PA classes, two nonlinear PA models, and two SNDR definitions. Our results reveal insights into the fundamental performance tradeoff inherent in SWIPT systems using hybrid signaling schemes.

Analysis of Stacked Alamouti Coding in Wireless Communication

2013 ◽  
Vol 380-384 ◽  
pp. 3505-3508
Author(s):  
Yi Peng Li ◽  
Hao Yang
Keyword(s):  
Wireless Communication ◽  
Upper Bound ◽  
Communication Systems ◽  
Signal To Noise Ratio ◽  
Ergodic Capacity ◽  
Wireless Communication Systems ◽  
High Signal ◽  
Signal To Noise ◽  
Alamouti Scheme ◽  
Alamouti Coding

Stacked Alamouti coding in MIMO wireless communication systems was analyzed through equivalent channel.We derive an upper bound on the portion of the ergodic capacity that the stacked Alamouti scheme can achieve, which is dependent on the ratio of number of transmit antennas to that of receive antennas in the high signal-to-noise ratio regime. As a conclusion, it is shown that the stacked Alamouti scheme can approach the channel capacity as long as the number of transmit antennas is no less than two times that of receive antennas.

scholarly journals Different encapsulation strategies for implanted electronics

2017 ◽  
Vol 3 (2) ◽  
pp. 725-728 ◽  
Author(s):  
Sebastian Winkler ◽  
Jan Edelmann ◽  
Christine Welsch ◽  
Roman Ruff
Keyword(s):  
Energy Transfer ◽  
Wireless Communication ◽  
Communication Systems ◽  
Mechanical Stability ◽  
Wireless Communication Systems ◽  
Electronic Systems ◽  
Wireless Energy Transfer ◽  
Electronic Components ◽  
Hermetic Sealing ◽  
Technical Solutions

AbstractRecent advancements in implant technology include increasing application of electronic systems in the human body. Hermetic encapsulation of electronic components is necessary, specific implant functions and body environments must be considered. Additional functions such as wireless communication systems require specialized technical solutions for the encapsulation.In this paper 3 different implant strategies based on the material groups silicone, ceramics and titanium alloys are evaluated. With the background of a specific application the requirements for the encapsulation are defined and include the implementation of electrical feedthroughs, wireless communication and wireless energy transfer as well as biomedical specifications such as hermetic sealing, mechanical stability and biocompatibility. The encapsulations are manufactured and qualified experimentally.

scholarly journals Dual-Determination of Modulation Types and Signal-to-Noise Ratios Using 2D-ASIQH Features for Next Generation of Wireless Communication Systems

IEEE Access ◽  
2021 ◽  
pp. 1-1
Author(s):  
Tarik Adnan Almohamad ◽  
Mohd Fadzli Mohd Salleh ◽  
Mohd Nazri Mahmud ◽  
Ismail Rakip Karas ◽  
Nor Shahida Mohd Shah ◽  
...  
Keyword(s):  
Wireless Communication ◽  
Communication Systems ◽  
Wireless Communication Systems ◽  
Next Generation ◽  
Signal To Noise

Secure Transmission of Analog Information using Chaos

2011 ◽  
pp. 337-360 ◽  
Author(s):  
A.S. Dmitriev ◽  
E.V. Efremova ◽  
L.V. Kuzmin ◽  
A.N. Miliou ◽  
A.I. Panas ◽  
...  
Keyword(s):  
Secure Communication ◽  
Communication Systems ◽  
Signal Transmission ◽  
Wireless Communication Systems ◽  
Practical Realization ◽  
Chaotic Response ◽  
Information Signal ◽  
Transmission Quality ◽  
Secure Transmission

In this work the authors present a thorough experimental study of a practical realization of a complex analog signal transmission system using dynamic chaos. It is demonstrated that the chaotic synchronous response could be used as a basis for the design of secure communication channels. The results presented in this work confirm the possibility of secure wireless communications in RF band, while they allow the authors to analyze in detail the restrictions and problems connected with the quality of synchronization of the transmitter and the receiver of the wireless communication systems. The effect of the perturbing factors on the transmission quality is investigated theoretically. It is shown that the main reason of the transmission’s quality degradation is the chaotic response desynchronization associated with the phenomenon of “on-off” intermittency. It is found that under the effect of the perturbing factors, the level of information signal fed to the transmitter must be increased in order to obtain qualitative information transmission. However, in order to provide secure communication, one must decrease the information signal level. A compromise on these contradictory requirements provides an improvement of the quality of the synchronous chaotic response in the receiver.

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