Filtered modulation schemes for short distance infrared wireless communications

2000 ◽  
Vol 46 (2) ◽  
pp. 275-282 ◽  
Author(s):  
R. Perez-Jimenez ◽  
J.A. Rabadan ◽  
F.J. Lopez-Hernandez
Keyword(s):  
Wireless Communications ◽  
Short Distance ◽  
Modulation Schemes

Design and evaluation of a 2-Mb/s GMSK modem for short-distance infrared wireless communications

1999 ◽  
Author(s):  
Rafael Perez-Jimenez ◽  
Cesar Montelongo ◽  
Jose A. Rabadan Borges
Keyword(s):  
Wireless Communications ◽  
Short Distance

scholarly journals Performance Evaluation of Different Modulation Schemes for Ultra Wide Band Systems

2014 ◽  
Vol 65 (3) ◽  
pp. 184-188 ◽  
Author(s):  
Tasnuva Ali ◽  
Poppy Siddiqua ◽  
Mohammad A. Matin
Keyword(s):  
Short Distance ◽  
Narrow Band ◽  
Wide Band ◽  
Performance Comparison ◽  
Ultra Wideband ◽  
Good Resolution ◽  
Transmission Power ◽  
Large Bandwidth ◽  
Simulation Results ◽  
Modulation Schemes

Abstract Ultra-wideband (UWB) signals with a large bandwidth has some advantages like multipath immunity, low transmission power, good resolution for ranging and detecting geo locations, as well as it can resist to narrow-band interference. These signals are used for transmission in short distance with high throughput. In this paper, we have analyzed different modulation schemes for performance comparison in terms of BER with UWB Gaussian second derivative monopulse and wavelet-based monopulse. The simulation results demonstrate that wavelet-based monopulse provides better performance in comparison to the other two monopulses.

Ultra-wideband monopole antenna with U and L shaped slotted patch for applications in 5G and short distance wireless communications

2020 ◽  
pp. 1-22
Author(s):  
Khalid Hamed Alharbi ◽  
Md. Moniruzzaman ◽  
Rabah W. Aldhaheri ◽  
Abdulah Jeza Aljohani ◽  
Simranjit Singh ◽  
...  
Keyword(s):  
Wireless Communications ◽  
Short Distance ◽  
Low Cost ◽  
Cutoff Frequency ◽  
Local Area ◽  
Monopole Antenna ◽  
Ultra Wideband ◽  
Impedance Bandwidth ◽  
Biomedical Sensors ◽  
Face To Face

In this paper, a monopole antenna with Ultra-wideband (UWB) characteristics is presented for applications in 5G and short-distance wireless communications. It consists of a rectangular shaped patch having truncated corners and central notch with an extended stub at top edge. Two layers of slots are engraved in the middle of the patch within which the outer layer contains four L shaped slots and the inner layer contains two face to face vertically placed U-shaped slots. A partial ground is structured with staircase slots to attain ultra-wideband response with sufficient gain and efficiency. The proposed antenna provides 124% of impedance bandwidth (2.8 GHz–12 GHz) implemented on a low-cost FR4 substrate having the electrical dimension of 0.3𝜆 × 0.19𝜆 at the low cutoff frequency. The effect of the inclusion of slots within the patch is clearly observable as it increases gain and efficiency. The proposed antenna exhibits better response with a maximum measured gain of 6.5 dBi and efficiency 85% within the bandwidth. Near constant time delay around 1 nS and good fidelity factor of 0.8316 represents that this slotted antenna can be used for undistorted reliable signal transfer. This antenna also provides symmetrical radiation patterns with less cross-polarization effects. Therefore, this monopole antenna can be an appropriate candidate for short-range communication applications like 5G, wireless local area networks, transfer data from biomedical sensors and imaging.

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