scholarly journals Low Density Spreading for next generation multicarrier cellular systems

2012 ◽  
Author(s):  
Mohammed AL-Imari ◽  
Muhammad Ali Imran ◽  
Rahim Tafazolli
Keyword(s):  
Cellular Systems ◽  
Low Density ◽  
Next Generation

scholarly journals NGTS-12b: A sub-Saturn mass transiting exoplanet in a 7.53 day orbit

2020 ◽  
Vol 499 (3) ◽  
pp. 3139-3148
Author(s):  
Edward M Bryant ◽  
Daniel Bayliss ◽  
Louise D Nielsen ◽  
Dimitri Veras ◽  
Jack S Acton ◽  
...  
Keyword(s):  
Radial Velocity ◽  
Effective Temperature ◽  
Low Density ◽  
Next Generation ◽  
Velocity Measurements ◽  
Long Period ◽  
Transmission Spectroscopy ◽  
Stellar Properties

ABSTRACT We report the discovery of the transiting exoplanet NGTS-12b by the Next Generation Transit Survey (NGTS). The host star, NGTS-12, is a V = 12.38 mag star with an effective temperature of Teff = 5690 ± 130 K. NGTS-12b orbits with a period of P = 7.53 d, making it the longest period planet discovered to date by the main NGTS survey. We verify the NGTS transit signal with data extracted from the Transiting Exoplanet Survey Satellite (TESS) full-frame images, and combining the photometry with radial velocity measurements from HARPS and FEROS we determine NGTS-12b to have a mass of 0.208 ± 0.022 MJ and a radius of 1.048 ± 0.032 RJ. NGTS-12b sits on the edge of the Neptunian desert when we take the stellar properties into account, highlighting the importance of considering both the planet and star when studying the desert. The long period of NGTS-12b combined with its low density of just 0.223 ± 0.029 g cm−3 make it an attractive target for atmospheric characterization through transmission spectroscopy with a Transmission Spectroscopy Metric of 89.4.

A 1.96 Gb/s Massive MU-MIMO Detector for Next-Generation Cellular Systems

2020 ◽  
Author(s):  
Chi-Chih Wen ◽  
Yu-Chi Lee ◽  
Yi-Chung Wu ◽  
Chen-Chien Kao ◽  
Chia-Hsiang Yang
Keyword(s):  
Cellular Systems ◽  
Next Generation

A Perspective on Self-Optimization in Next Generation Cellular Networks

2016 ◽  
pp. 66-91
Author(s):  
Sumita Mishra ◽  
Nidhi Mathur
Keyword(s):  
Quality Of Service ◽  
Cellular Networks ◽  
Poor Quality ◽  
Wireless Channel ◽  
Cellular Systems ◽  
Next Generation ◽  
High Bandwidth ◽  
Telecom Service ◽  
Key Aspects

During the past few decades wireless technology has seen a tremendous growth. The recent introduction of high-end mobile devices has further increased subscribers' demand for high bandwidth and quality of service. The number of nodes in future cellular systems will be too large to be configured and maintained manually. Further the mobility of users, the varying nature of the wireless channel and variation in user demand systems requires optimization of network parameters and delay in configuration may cause congestion and poor Quality of Service. Due to this increased complexity and the huge scale of wireless systems the network configuration, optimization and maintenance process performed by radio engineers has become inefficient and therefore, lot of research is being done to introduce self-optimizing capabilities within the network, which is expected to permit higher end user Quality of Service (QoS) and less operation cost and maintenance cost for telecom service providers. This chapter details the key aspects related to self optimization of next generation cellular networks.

Light and RF dual connectivity for the next generation cellular systems

2017 ◽  
Author(s):  
Ahmed Al-Kinani ◽  
Cheng-Xiang Wang ◽  
Fourat Haider ◽  
Harald Haas ◽  
Wensheng Zhang ◽  
...  
Keyword(s):  
Cellular Systems ◽  
Next Generation ◽  
Dual Connectivity
Sign in / Sign up

Export Citation Format

Share Document