Results 231 to 240 of about 904,551 (275)

Spectrum Sharing through Contracts

2010 IEEE Symposium on New Frontiers in Dynamic Spectrum (DySPAN), 2010
Development of dynamic spectrum access and allo- cation techniques recently [6] have made feasible the vision of cognitive radio systems. However, a fundamental question arises: Why would licensed primary users of a spectrum band allow secondary users to share the band and degrade performance for them?
Dileep M. Kalathil, Rahul Jain
openaire   +1 more source

Dynamic Spectrum Sharing Detectors

2007 2nd IEEE International Symposium on New Frontiers in Dynamic Spectrum Access Networks, 2007
Dynamic frequency sharing provides a mean to more efficiently allocate frequency spectrum. For this to be accomplished the ambient spectrum has to be sensed and characterized. This paper presents how energy detection can be used to differentiate signals from noise for various operating environments.
Karl N. Steadman, Ashley D. Rose, Thao T. N. Nguyen   +2 more
openaire   +1 more source

Spectrum Sharing Exploiting Spectrum Database for LPWA

2019 Eleventh International Conference on Ubiquitous and Future Networks (ICUFN), 2019
In the most of current low power wide area (LPWA), packet collisions of uplink communication are controlled by setting duty cycle (DC), which controls the transmission cycle not to exceed the predefined fixed threshold. However, as the number of LPWA nodes increases, the fixed DC fatally increases the number of packet collisions and degrades the ...
Yudai Yamazaki, Takeo Fujii, Osamu Takyu, Mai Ohta, Koichi Adachi   +4 more
openaire   +1 more source

Simulation in spectrum sharing

Simulation and Modelling of Satellite Systems, 2002
The radio spectrum is a limited resource. Its regulation and management have become increasingly important as a result of an ever-growing demand for wireless communication applications. Access to the radio spectrum is based on the Table of Frequency Allocations of the International Telecommunications Union (ITU) Radio Regulations.
openaire   +1 more source

Spectrum Sharing for 5G

2016
Spectrum sharing for 5G is motivated by the fact that significantly more spectrum and much wider bandwidths than what is available today will be needed in order to realize the performance targets of 5G. First, spectrum sharing scenarios, i.e. vertical sharing and horizontal sharing, are summarized for different type of spectrum.
Gen Li, Tan Wang, Qingyu Miao, Ying Wang, Biao Huang   +4 more
openaire   +1 more source

Spectrum-Sharing Transmission Capacity

IEEE Transactions on Wireless Communications, 2011
This paper analyzes spectrum sharing between multiple systems. The efficiency of spectrum sharing is determined primarily by interference, which is a function of the spatial densities of the transmitters in systems dependent on the chosen spectrum sharing method.
Jemin Lee, Jeffrey G. Andrews, Daesik Hong   +2 more
openaire   +1 more source

SHARED SPECTRUM DISPLAY ENHANCEMENT

1965
Abstract : An illumination system is described which utilizes for display, portions of the visible spectrum which have been excluded from the ambient light. The resulting tinted illumination is matched in brightness to a standard white light by experimental subjects, and stimulus threshold measurements made as a function of display intensity for ...
Ann R. Bien, Marvin H. Detambel, James G. Rogers   +2 more
openaire   +1 more source

Enabling Spectrum Sharing via Spectrum Consumption Models

IEEE Journal on Selected Areas in Communications, 2015
Spectrum consumption models attempt to capture spectral, spatial, and temporal consumption of spectrum of any specific RF transmitter, receiver, system, or collection of systems. The information contained in the models enables better spectrum management practices and allows for the identification of spectrum reuse opportunities. The characteristics and
John A. Stine, Carlos E. Caicedo Bastidas   +1 more
openaire   +1 more source

Spectrum-Shared Resource Allocation

2016
Mobile broadband networks observe a dramatic increase in data traffic volumes over the next two decades [4]. To meet this demand, large spans of spectrum is an important issue for any RAN system. On the flip side, this demand for more bandwidth exceeds the available commercial spectrum to a large extent and has motivated spectrum-governing agencies ...
Mo Ghorbanzadeh, Ahmed Abdelhadi, Charles Clancy   +2 more
openaire   +1 more source

Database-Assisted Spectrum Sharing

2016
In this chapter, we will provide a brief introduction to the database-assisted dynamic spectrum sharing technology, including the network architecture, the regulatory and standardization status, and the associated technical and economic issues and challenges. We will review the current regulations of the UK and the US and illustrate how various network
Yuan Luo, Lin Gao, Jianwei Huang
openaire   +1 more source