A Multi-Band Carrier Aggregation Scheme for Mobile Satellite Communications

2014 ◽  
Vol 548-549 ◽  
pp. 1282-1285
Author(s):  
Ya Zhe Gao ◽  
Xu Yang ◽  
Xiao Geng ◽  
Jian Bo Li ◽  
Jian Jun Wu
Keyword(s):  
Mobile Communication ◽  
Communication System ◽  
Satellite Communications ◽  
Carrier Aggregation ◽  
Mobile Communication System ◽  
Transmission Parameters ◽  
Aggregation Scheme ◽  
Mobile Satellite ◽  
Synchronization Scheme ◽  
Multi Band

This paper works on the scheme of multi-band carrier aggregation in satellite mobile communication system. According to the transmission characteristics of carriers in different frequency bands, the transmission parameters of OFDM in different bands have been got. The applicability of the traditional carrier aggregation scheme in satellite mobile communication system has also been discussed. A scheme of the cross band carrier aggregation in satellite mobile communication system and the corresponding synchronization scheme of data symbols are given. Numerical calculation and analysis are given to confirm the rationality and effectiveness.

scholarly journals The usage of mobile communication systems in the trucking industry

2000 ◽  
Vol 12 (1) ◽  
pp. 49-56
Author(s):  
R Stephen Parker ◽  
John L Kent ◽  
Karl B Manrodt
Keyword(s):  
Mobile Communication ◽  
Mobile Communications ◽  
Communication System ◽  
Communication Systems ◽  
Cell Phones ◽  
Satellite Communications ◽  
Trucking Industry ◽  
Mobile Communication Systems ◽  
Mobile Communication System ◽  
Decision Factors

This article reports the findings of a mobile communications survey mailed out to over 2,000 trucking firms. The findings indicate that 68% of respondents use some form of mobile communication system in their firm. Various types of mobile communication systems were reported, including two-way pagers, one-way pagers, cell phones, two-way radio, and satellite communications. Additionally, implementation decision factors for mobile communication systems were evaluated for both users and non-users of mobile communication systems.

Multi-band planar diplexers with sub-sets of frequency-contiguous transmission bands

2021 ◽  
pp. 1-11
Author(s):  
Roberto Gómez-García ◽  
Li Yang ◽  
José-María Muñoz-Ferreras ◽  
Dimitra Psychogiou
Keyword(s):  
High Frequency ◽  
Transmission Band ◽  
Satellite Communications ◽  
Proof Of Concept ◽  
Transmission Zeros ◽  
Cascade Connection ◽  
Coupling Techniques ◽  
In Series ◽  
Mobile Satellite ◽  
Multi Band

Abstract A class of multi-band planar diplexer with sub-sets of frequency-contiguous transmission bands is reported. Such a radio frequency (RF) device is suitable for lightweight high-frequency receivers aimed at multi-band/multi-purpose mobile satellite communications systems. It consists of two channelizing filters, each of them being made up of the in-series cascade connection of replicas of a constituent multi-passband/multi-embedded-stopband filtering stage. This building filtering stage defines a multi-passband transfer function for each channel, in which each main transmission band is split into various sub-passbands by the multi-stopband part. In this manner, each split passband gives rise to several sub-passbands that are imbricated with their counterpart ones of the other channel. The theoretical RF operational principles of the proposed multi-band diplexer approach with sub-sets of imbricated passbands are detailed by means of a coupling–routing–diagram formalism. Besides, the generation of additional transmission zeros in each channelizing filter for higher-selectivity realizations by exploiting cross-coupling techniques into it is also detailed. Furthermore, for experimental demonstration purposes, a microstrip proof-of-concept prototype of second-order octo-band diplexer in the frequency range of 1.5–2.5 GHz that consists of two quad-band channelizing filters with pairs of imbricated passbands is developed and characterized.

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