Antenna Feed Array Synthesis for Efficient Communication Systems

2020 ◽  
Vol 20 (24) ◽  
pp. 15085-15098
Author(s):  
Oluwole John Famoriji ◽  
Zhiwei Xu
Keyword(s):  
Communication Systems ◽  
Antenna Feed ◽  
Efficient Communication

scholarly journals New Compact Wearable Metamaterials Circular Patch Antennas for IoT, Medical and 5G Applications

2020 ◽  
Vol 3 (4) ◽  
pp. 42
Author(s):  
Albert Sabban
Keyword(s):  
Communication Systems ◽  
Dynamic Range ◽  
Low Cost ◽  
Patch Antennas ◽  
Antenna Feed ◽  
Circular Patch ◽  
Wearable Antenna ◽  
Wearable Antennas ◽  
Feed Network ◽  
Line Design

The development of compact passive and active wearable circular patch metamaterials antennas for communication, Internet of Things (IoT) and biomedical systems is presented in this paper. Development of compact efficient low-cost wearable antennas are one of the most significant challenges in development of wearable communication, IoT and medical systems. Moreover, the advantage of an integrated compact low-cost feed network is attained by integrating the antenna feed network with the antennas on the same printed board. The efficiency of communication systems may be increased by using efficient passive and active antennas. The system dynamic range may be improved by connecting amplifiers to the printed antenna feed line. Design, design considerations, computed and measured results of wearable circular patch meta-materials antennas with high efficiency for 5G, IoT and biomedical applications are presented in this paper. The circular patch antennas electrical parameters on the human body were analyzed by using commercial full-wave software. The circular patch metamaterial wearable antennas are compact and flexible. The directivity and gain of the antennas with Circular Split-Ring Resonators (CSRR) is higher by 2.5dB to 3dB than the antennas without CSRR. The resonant frequency of the antennas without CSRR is higher by 6% to 9% than the antennas with CSRR. The computed and measured bandwidth of the stacked circular patch wearable antenna with CSRR for IoT and medical applications is around 12%, for S11 lover than −6dB. The gain of the circular patch wearable antenna with CSRR is around 8dBi.

Power Management Technique for Energy-Efficient Communication Systems in Telemedicine

2021 ◽  
pp. 115-143
Author(s):  
K. Sujatha ◽  
N. P. G. Bhavani ◽  
Rajeswary Hari ◽  
K. Senthil Kumar ◽  
N. Jayachitra ◽  
...  
Keyword(s):  
Power Management ◽  
Energy Efficient ◽  
Communication Systems ◽  
Management Technique ◽  
Energy Efficient Communication ◽  
Efficient Communication

Open Threads-Enabled Mesh Networks in Vehicles for Real-Time Traffic Monitoring

2020 ◽  
pp. 120-143
Author(s):  
Parul Choudhary ◽  
Rakesh kumar Dwivedi ◽  
Umang Singh
Keyword(s):  
Traffic Congestion ◽  
Communication Systems ◽  
Mesh Networks ◽  
Traffic Monitoring ◽  
Mesh Network ◽  
Real Time Traffic ◽  
Innovative Solutions ◽  
Efficient Communication ◽  
Adaptive Solution ◽  
Inter Communication

The exponential increase of traffic on roads has led to numerous disastrous consequences. These issues demand an adaptive solution that ensures road safety and decreases the traffic congestion on roads. New paradigms such as Cloud computing and internet of things are aiding in achievement of the inter-communication among the vehicles on road. VANETs are designed to provide effective and efficient communication systems to develop innovative solutions but are restricted due to mobility constraints. This chapter proposes an IP-based novel framework composed of open threads integrated with VANETs exchanging information to create a mesh network among vehicles. This novel Open Threads-based infrastructure can help in achieving a more economical, efficient, safer, and sustainable world of transportation which is safer and greener. This chapter also discusses and compares various thread-enabled microcontrollers by different vendors that can be utilized to create a mesh network.

Multi-Carrier Modulation Techniques for Bandwidth Efficient Communication Systems

2003 ◽  
Vol 49 (4) ◽  
pp. 227-233
Author(s):  
Nnssrk Prasad ◽  
K Preeti ◽  
G K Bhavani ◽  
V Shameem ◽  
Pnap Rao
Keyword(s):  
Communication Systems ◽  
Modulation Techniques ◽  
Efficient Communication

Enabling 5G: energy and spectrally efficient communication systems

2014 ◽  
Vol 26 (1) ◽  
pp. 1-2 ◽  
Author(s):  
Rahim Tafazolli ◽  
Sergio Palazzo ◽  
Miquel Payaró ◽  
Robert W. Heath
Keyword(s):  
Communication Systems ◽  
Efficient Communication ◽  
Spectrally Efficient

Development and evaluation of airborne microwave refractometer for studies on atmospheric tropical boundary layer radiorefractive index

1994 ◽  
Vol 12 (8) ◽  
pp. 785-793 ◽  
Author(s):  
S. B. S. S. Sarma ◽  
B. M. Reddy
Keyword(s):  
Boundary Layer ◽  
Communication Systems ◽  
Electromagnetic Propagation ◽  
Tropical Country ◽  
High Resolution Data ◽  
Layer Structures ◽  
Efficient Communication ◽  
Low Altitude ◽  
Time Basis ◽  
Future Direction

Abstract. Observations of high-resolution data on radio refractivity were obtained by the airborne microwave refractometer over the Indian sub-continent (a tropical country) from 1971 to 1988. Detailed vertical and horizontal distributions of radio refractivity on a near-real-time basis in the atmospheric boundary layer were determined . Radiosonde observations cannot detect the thin refractivity gradients which characterize the propagation environment in this low-altitude region. This knowledge is required to design reliable and efficient communication systems for strategic, tactical and operational needs. However, the results demonstrate the layer structures and the variability of the boundary layer in time and space. The radio refractive effects on electromagnetic propagation and the future direction of radio refractivity fine-structure measurements are discussed.

TRANSMISSION OF SHORT MESSAGES IN SATELLITE COMMUNICATION SYSTEMS WITH PERMUTATION MODULATION AND REED-SOLOMON CODES

2021 ◽  
Author(s):  
М.А. БЫХОВСКИЙ
Keyword(s):  
Turbo Codes ◽  
Energy Efficient ◽  
Communication Systems ◽  
Communication Channel ◽  
Satellite Communication ◽  
Short Message ◽  
Rs Codes ◽  
Efficient Communication ◽  
Modulation Methods ◽  
Short Messages

В статье выполнено исследование возможности создания энергетически эффективных систем связи, предназначенных для передачи коротких сообщений длиной 50...1000 бит по каналу связи, в которых применяются ансамбли сигналов с перестановочной модуляцией, а также коды Рида-Соломона. Полученные результаты показали, что рассмотренные системы связи при вероятности ошибки декодирования принятого сообщения, равной Pdec=10-6 , имеют существенный энергетический выигрыш (примерно 2,6 дБ) по сравнению с системами, в которых используются сигналы с модуляцией 2-PSK, коды с малой плотностью проверок на четность (LDPC), турбокоды и др. Кроме того, показано, что системы связи, в которых для передачи коротких сообщений применяются ансамбли сигналов, оптимальных по Шеннону, энергетически эффективнее по сравнению с системами, в которых для этого используются традиционные методы модуляции и помехоустойчивые коды. Применение оптимальных по Шеннону ансамблей позволяет существенно сократить длительность сигналов при передаче такого же количества бит, которое может быть передано по каналу связи традиционными методами. The article investigates the possibility of creating energy-efficient communication systems designed to transmit short messages 50...1000 bits long via a communication channel in which signal ensembles with permutation modulation (PM) are used, as well as Reed-Solomon (RS) codes. The results obtained showed that the considered communication systems with a probability of decoding error of the received message equal to Pdec=10-6 have a significant energy gain (approximately 2.6 dB), in comparison with systems that use signals with 2-PSK and LDPC codes, turbo codes, etc. It is shown that communication systems using Shannon-optimal signal ensembles for short message transmission are more energy efficient than systems using traditional modulation methods and noise-resistant codes. The use of Shannon-optimal ensembles can significantly reduce the duration of signals when transmitting the same number of bits that can be transmitted over the communication channel by traditional methods.

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