Enabling High Performance Wireless Communication Systems Using Reconfigurable Antennas

MILCOM 2006 ◽  
2006 ◽  
Author(s):  
T. Roach ◽  
G. Huff ◽  
J. Bernhard
Keyword(s):  
Wireless Communication ◽  
Communication Systems ◽  
High Performance ◽  
Reconfigurable Antennas ◽  
Wireless Communication Systems

Dynamically Reconfigurable Computing for Wireless Communication Systems (Dynamisch rekonfigurierbares Rechnen für Mobilfunksysteme)

2007 ◽  
Vol 49 (3) ◽  
Author(s):  
Heiko Hinkelmann ◽  
Peter Zipf ◽  
Manfred Glesner ◽  
Thilo Pionteck
Keyword(s):  
Wireless Communication ◽  
Reconfigurable Computing ◽  
Energy Efficient ◽  
Communication Systems ◽  
High Performance ◽  
Wireless Communication Systems ◽  
Computing Systems ◽  
Dynamically Reconfigurable ◽  
Hardware Platforms ◽  
Application Specific

In this paper we will demonstrate that dynamically reconfigurable computing is the key technology to enable small and energy-efficient hardware platforms for wireless communication systems, which provide the flexibility needed for keeping up with evolving standards and protocols. Two application-specific dynamically reconfigurable systems for WLANs and wireless sensor networks will be presented. The first architecture clearly shows that highly dynamic reconfiguration approaches can provide flexible and high-performance hardware platforms that are smaller than standard ASIC solutions. The second architecture serves as a case study for the design of energy-efficient dynamically reconfigurable computing systems.

scholarly journals Frequency reconfigurable antennas for cognitive radio applications: a review

2019 ◽  
Vol 9 (5) ◽  
pp. 3542
Author(s):  
Ros Marie C Cleetus ◽  
Dr. G. Josemin Bala
Keyword(s):  
Cognitive Radio ◽  
Wireless Communication ◽  
Communication Systems ◽  
Cognitive Radios ◽  
Reconfigurable Antennas ◽  
Wireless Communication Systems ◽  
Frequency Pattern ◽  
Communication Services ◽  
Effective Utilization ◽  
Antenna Characteristic

<span>Wireless communication systems undergo tremendous growth these days and devices able to operate in a number of frequencybandsarehighlydemanded. Reconfiguration in antenna characteristic striggered the evolution of antennas that can workin multiple frequency, pattern<span> or polarization </span>environment.The frequency reconfigurable antennas thuse mergedarewell suited in Cognitive Radios which take part in the effective utilization of unused bands of frequencies by continuously interacting with the RF environment. Thus, Cognitive Radios enhancetheutilization of frequency spectrum and establish reliable communication. The most recent research works carried out in the arena of Frequency Reconfigurable Antennas for Cognitive Radio applications are reviewed and summed up in this paper to present the attributes and categorization. Four techniques adopted to attain frequency reconfiguration are extensively compared in this paper to find the advantages and constraints of each methodology. The applications of the works reviewed here are not only limited to Cognitive radios, but extended to a number of wireless communication services like, WLAN, WiMAX, etc</span>

scholarly journals High efficiency Doherty power amplifiers for modern wireless communication systems: A brief review

2021 ◽  
Vol 23 (3) ◽  
pp. 1855
Author(s):  
Mussa Mabrok ◽  
Zahriladha Zakaria ◽  
Tole Sutikno
Keyword(s):  
Wireless Communication ◽  
Power Amplifiers ◽  
Communication Systems ◽  
High Performance ◽  
High Efficiency ◽  
Average Power ◽  
Wireless Communication Systems ◽  
Saturation Power ◽  
Low Efficiency ◽  
Suitable Technique

Due<span lang="EN-MY">to the high peak to average power ratio (PAPR) of modern modulated signals, power amplifiers (PAs) have been forced to operate at the back-off (BO) region of their saturation power in order to avoid signal clipping and distortion. However, classical PAs suffer from low efficiency in the BO region operation. Therefore, efficiency has to be enhanced in that region. Many techniques have been proposed. Among them, the Doherty power amplifier (DPA) is considered as the most suitable technique due to its simple structure and high performance. However, its conventional design is limited to a 6 dB BO level, which does not satisfy the requirements of modern communication systems. In this paper, a brief review of the most significant techniques of high-efficiency DPA is presented. First, DPA topology and its operation principles are briefly discussed. Second, efficiency enhancement techniques such as an asymmetrical DPA, output combiner modification, gate bias adaption, offset line optimization, and multi-way DPA were discussed. The study shows that the most suitable, simple, and effective solution is an asymmetrical approach. However, it needs to be investigated in terms of bandwidth in order to meet the efficiency-bandwidth requirements of modern wireless communication systems such as </span>5G.

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