Preamble Design and System Acquisition in Ultra Mobile Broadband Communication Systems

2008 ◽  
Author(s):  
Michael Mao Wang ◽  
Sandeep Aedudodla ◽  
Aamod Khandekar ◽  
Ravi Palanki ◽  
Avneesh Agrawal
Keyword(s):  
Communication Systems ◽  
Broadband Communication ◽  
Mobile Broadband ◽  
System Acquisition

scholarly journals Multilayered Cavity Material Radial Line Slot Array Antenna with Improved Bandwidth for 5G Communication Application

2016 ◽  
Vol 10 (8) ◽  
pp. 134
Author(s):  
Ibrahim Maina ◽  
Tharek Abd Rahman ◽  
Mohsen Khalily ◽  
Splomon Iliya Zakwoi
Keyword(s):  
Bandwidth Allocation ◽  
Communication Systems ◽  
Syntactic Foam ◽  
Array Antenna ◽  
Impedance Bandwidth ◽  
Wave Band ◽  
Radial Line ◽  
Broadband Communication ◽  
Mobile Broadband ◽  
Large Bandwidth

Mobile broadband communication systems like the fifth generation (5G) will require large bandwidth allocation. Currently, the sweet spot is congested with no enough spectrum to support higher bandwidth allocation. The millimeter wave band is being explored to provide the needed spectrum with 28 GHz so far identified as a potential carrier frequency. Development of complimentary antennas for transmission and reception on the band therefore become necessary. This paper present the design of linearly polarized radial line slot array antenna at 28 GHz for mobile broadband communication system application. The antenna consists of radiating surface with radius ρ sitting on squared cavity and ground of side 2ρ. It is excited via a rear center mounted modified straight dielectric coated 50 Ω SSMA connector. The cavity is filled with layers of air space, low dielectric constant syntactic foam and high frequency laminate RT/duroid 5880. With ρ = 50 mm and a maximum total cavity height of 3.0 mm, the antenna was simulated using Computer Simulation Technology Microwave Studio 2014 software. A gain of 18.13 dB, directivity of 18.4 dBi, efficiency of 96 % and impedance bandwidth of up to 2.34 GHz were realized.

scholarly journals Spectrum Usage in Mobile Broadband Communication Systems / RADIOFREKVENČU IZMANTOŠANA MOBILO PLATJOSLAS SAKARU SISTĒMĀS

2013 ◽  
Vol 50 (3) ◽  
pp. 49-58 ◽  
Author(s):  
G. Ancans ◽  
V. Bobrovs ◽  
G. Ivanovs
Keyword(s):  
Communication Systems ◽  
New Technologies ◽  
Spectrum Management ◽  
Mobile Environment ◽  
Broadband Communication ◽  
Frequency Bands ◽  
Mobile Broadband ◽  
High Data ◽  
The Future ◽  
Radio Frequency Spectrum

The increased demand of mobile broadband consumers on services in the mobile environment with high data rate and technologically developed mobile broadband communication systems will require more spectrum to be available in the future. The new technologies as well as the existing services require frequencies for their development. The authors investigate the available and potential future mobile terrestrial frequency bands - worldwide and in Europe. An insight into the spectrum management is provided, with radio access technologies, methods for more efficient use of mobile frequency bands and frequency cross-border coordination also addressed. It is stressed that the radio frequency spectrum is a limited national resource that will become increasingly precious in the future.

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