Low-complexity receiver structure with sub-Nyquist analog to digital sampling rate for pulsed-OFDM ultra wideband communication systems

2005 ◽  
Author(s):  
E. Saberinia ◽  
A.H. Tewfik
Keyword(s):  
Communication Systems ◽  
Sampling Rate ◽  
Low Complexity ◽  
Ultra Wideband ◽  
Analog To Digital ◽  
Digital Sampling ◽  
Ultra Wideband Communication

scholarly journals Adaptive Sub-Nyquist Spectrum Sensing for Ultra-Wideband Communication Systems

Symmetry ◽  
2019 ◽  
Vol 11 (3) ◽  
pp. 342
Author(s):  
Yong Lu ◽  
Shaohe Lv ◽  
Xiaodong Wang
Keyword(s):  
Spectrum Sensing ◽  
Frequency Band ◽  
Communication Systems ◽  
High Speed ◽  
Signal To Noise Ratio ◽  
Sampling Rate ◽  
Ultra Wideband ◽  
Wideband Spectrum Sensing ◽  
Adaptive Policy ◽  
Ultra Wideband Communication

With the ever-increasing demand for high-speed wireless data transmission, ultra-wideband spectrum sensing is critical to support the cognitive communication over an ultra-wide frequency band for ultra-wideband communication systems. However, it is challenging for the analog-to-digital converter design to fulfill the Nyquist rate for an ultra-wideband frequency band. Therefore, we explore the spectrum sensing mechanism based on the sub-Nyquist sampling and conduct extensive experiments to investigate the influence of sampling rate, bandwidth resolution and the signal-to-noise ratio on the accuracy of sub-Nyquist spectrum sensing. Afterward, an adaptive policy is proposed to determine the optimal sampling rate, and bandwidth resolution when the spectrum occupation or the strength of the existing signals is changed. The performance of the policy is verified by simulations.

Design and Performance Analysis of Fractal Regular Slotted-Patch Antennas for Ultra-Wideband Communication Systems

2019 ◽  
Vol 105 (3) ◽  
pp. 819-833 ◽  
Author(s):  
Majed O. Dwairi ◽  
Mohamed S. Soliman ◽  
Ahmad A. Alahmadi ◽  
Sami H. A. Almalki ◽  
Iman I. M. Abu Sulayman
Keyword(s):  
Performance Analysis ◽  
Communication Systems ◽  
Ultra Wideband ◽  
Patch Antennas ◽  
And Performance ◽  
Ultra Wideband Communication
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