Commission fédérale des communications

La Commission fédérale des communications ou FCC ( Federal Communications Commission ) est présentée comme une agence indépendante du gouvernement des États-Unis, créée par le Congrès américain en 1934 pour réguler les télécommunications, puis les contenus des émissions de radio, télévision et Internet. Cette indépendance n'existe plus car la plupart des responsables de commission (commissaires) et son président sont nommés par le président des États-Unis, ainsi Donald Trump a remplacé l’investisseur et lobbyiste démocrate Tom Wheeler par un ancien avocat de Verizon, Ajit Varadaraj Pai, lui même remplacé en 2021 par Jessica Rosenworcel. Historique Acte fondateur - 1934 En 1934, le Congrès des Etats-Unis adopte une loi sur la communication (Communications Act) qui permet le remplacement de la précédente commission fédérale de la Radio par une nouvelle commission fédérale des communications (FCC). Cette commission régule les communications radio et les télécommu

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Chargement

A Low Profile UWB Antenna for Wearable Applications: The Tripod Kettle Antenna (TKA)

Dea Dorina Cara, Anja Skrivervik Favre, Roberto Torres Sánchez, Jovanche Trajkovikj

A new low profile ultra-wideband (UWB) antenna for wearable applications is presented. Its structure is derived from the quadripod kettle antenna (QKA) [1], and is called tripod kettle antenna (TKA). The proposed antenna is very well suited for wearable applications due to its miniature size and low profile. Moreover, the antenna is completely encapsulated in a Polydimethylsiloxane (PDMS) substrate enabling a certain level of flexibility and a good robustness against different external influences (e. g. different weather conditions). The TKA is a broadband antenna with 70% coverage of the fractional UWB bandwidth (Federal Communications Commission, FCC). The antenna has a polarization perpendicular to the body surface with a quasi-omnidirectional radiation pattern in the plane orthogonal to the polarization. An antenna prototype has been built and characterized, and measured results are in a good compliance with the simulations.

Ieee2013

Chargement

Firmware for ensuring realtime radio regulations compliance in WSN

Alexis Boegli, Pierre-André Farine, Mitko Tanevski

All wireless devices must comply with the local radio regulations which are set by international and national regulatory bodies such as the European Telecommunication Standardization Institute (ETSI) for Europe and the Federal Commission for Communication (FCC) for US. In this paper a new firmware module is proposed, that will ensure that devices, in all circumstances will comply with the ETSI regulations for single channel emissions in the 868MHz ISM band. Namely, assuring compliance with the duty-cycle limit, the maximum Tx time and minimum Tx-off time limit. Such a solution has not been researched mostly due to the popularity of the virtually world-wide 2.4 GHz ISM band which at present does not impose duty-cycle limitations. The wireless sensor networks (WSNs) operating in the 868MHz band have their own niche applications that benefit from the increased signal range. The development and the acceptance of such applications will benefit from the existence of the proposed module implemented in firmware/software. We propose such a solution and demonstrate its implementation on a custom developed node and protocol. Implementation with IEEE 802.15.4 standard is discussed as well. We also analyze the memory, time and energy overheads caused by including the module in the firmware.

IEEE Computer Society2012

Chargement

Method of real-time regulation compliance for wireless transmitters

Alexis Boegli, Pierre-André Farine, Mitko Tanevski

All wireless devices must comply with the local radio regulations which are set by international and national regulatory bodies such as the European Telecommunication Standardization Institute (ETSI) for Europe and the Federal Commission for Communication (FCC) for US. A new firmware module is proposed, that will ensure that devices, in all circumstances will comply with the ETSI regulations for single channel emissions in the 868 MHz ISM band. Namely, assuring compliance with the duty-cycle limit, the maximum TX time and minimum TX-off time limit. Such a solution has not been researched mostly due to the popularity of the virtually worldwide 2.4 GHz ISM band which does not have duty-cycle limitations. The wireless sensor networks (WSN) operating in the 868 MHz band have their own niche applications that benefit from the increased signal range. The development and the acceptance of such applications will benefit from the existence of the proposed module implemented in firmware/software. We propose such a solution and demonstrate its implementation on a custom developed node and protocol. Implementation on top of standardized protocol layers is also analyzed. We also analyze the memory, time and energy overheads caused by including the module in the firmware.

2015

Chargement

DH-500: Computational Social Media

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Les télécommunications sont définies comme la transmission d’informations à distance en utilisant des technologies électronique, informatique, de transmission filaire, optique ou électromagnétique.