Critical analysis of high speed wireless standards for transferring telementoring information

2004 ◽  
Author(s):  
F. Shaikh ◽  
A. Lasebae ◽  
G. Whitney
Keyword(s):  
Critical Analysis ◽  
High Speed ◽  
Wireless Standards

scholarly journals A secured MAC address based Login System

2018 ◽  
Vol 2 (2) ◽  
Author(s):  
Sanjay Tiwari ◽  
Tanuj Tiwari ◽  
Tanya Tiwari
Keyword(s):  
Ieee 802.11 ◽  
High Speed ◽  
Wireless Networking ◽  
Innovative Approach ◽  
Wireless Standards ◽  
Networking Technology ◽  
Wireless Fidelity

Wi-Fi an acronym for wireless fidelity is a wireless networking technology that allows computers and other devices to communicate over a wireless high speed Internet and utilizes one of the IEEE 802.11 wireless standards to achieve a wireless connection to a network. Every device has a unique MAC Address used for identifying devices connected over Wi-Fi.  Since virtually every device now in the market is Wi-Fi capable, MAC address can be considered as a universal identifier. This paper proposes innovative approach to use the MAC Address as an authentication method.

scholarly journals Quantum security and 6G critical infrastructure

2021 ◽  
Vol 6 (1) ◽  
pp. 1-8
Author(s):  
Miloslav Hoschek
Keyword(s):  
Network Architecture ◽  
High Speed ◽  
Critical Infrastructure ◽  
Internet Communication ◽  
New Paradigm ◽  
Quantum Communications ◽  
Time Zone ◽  
Network Nodes ◽  
Data Rates ◽  
Wireless Standards

In the mid 2030-s in the field of defense and national security communications the quantum computers and 6G artificial intelligence will have domination. 6G communication is accepted in a variety of mobile data comparts transmitted through spectral technologies. The human body becomes a part of the 6G network architecture. A set of network nodes or wearable devices, embedded sensors or nanodes collect confidential information that is exchanged for multiple purposes, such as health, statistics, and safety. An important part of the 6G new paradigm will be intelligent reflective surfaces, quantum teleportation, quantum encrypted messaging, 6G holography, distributed ledger, 6G layer security threats. The 6G wireless standards will allow real-time time zone high-speed internet communication with 1TB data per second. The radio frequency networks, THZ communications, molecular communications, and quantum communications will dramatically improve data rates.

System Architecture for 3GPP-LTE Modem using a Programmable Baseband Processor

2012 ◽  
pp. 102-121
Author(s):  
Di Wu ◽  
Johan Eilert ◽  
Rizwan Asghar ◽  
Dake Liu ◽  
Anders Nilsson ◽  
...  
Keyword(s):  
Mobile Communications ◽  
System Architecture ◽  
High Speed ◽  
Processing Time ◽  
Single Chip ◽  
Turbo Decoder ◽  
Baseband Processor ◽  
Baseband Processors ◽  
Wireless Standards

The evolution of third generation mobile communications toward high-speed packet access and long-term evolution is ongoing and will substantially increase the throughput with higher spectral efficiency. This paper presents the system architecture of an LTE modem based on a programmable baseband processor. The architecture includes a baseband processor that handles processing time and frequency synchronization, IFFT/FFT (up to 2048-p), channel estimation and subcarrier de-mapping. The throughput and latency requirements of a Category four User Equipment (CAT4 UE) is met by adding a MIMO symbol detector and a parallel Turbo decoder supporting H-ARQ, which brings both low silicon cost and enough flexibility to support other wireless standards. The complexity demonstrated by the modem shows the practicality and advantage of using programmable baseband processors for a single-chip LTE solution.

System Architecture for 3GPP-LTE Modem using a Programmable Baseband Processor

2010 ◽  
Vol 1 (3) ◽  
pp. 44-64 ◽  
Author(s):  
Di Wu ◽  
Johan Eilert ◽  
Rizwan Asghar ◽  
Dake Liu ◽  
Anders Nilsson ◽  
...  
Keyword(s):  
Mobile Communications ◽  
System Architecture ◽  
High Speed ◽  
Frequency Synchronization ◽  
Single Chip ◽  
Turbo Decoder ◽  
Baseband Processor ◽  
Baseband Processors ◽  
Wireless Standards

The evolution of third generation mobile communications toward high-speed packet access and long-term evolution is ongoing and will substantially increase the throughput with higher spectral efficiency. This paper presents the system architecture of an LTE modem based on a programmable baseband processor. The architecture includes a baseband processor that handles processing time and frequency synchronization, IFFT/FFT (up to 2048-p), channel estimation and subcarrier de-mapping. The throughput and latency requirements of a Category four User Equipment (CAT4 UE) is met by adding a MIMO symbol detector and a parallel Turbo decoder supporting H-ARQ, which brings both low silicon cost and enough flexibility to support other wireless standards. The complexity demonstrated by the modem shows the practicality and advantage of using programmable baseband processors for a single-chip LTE solution.

scholarly journals Design and Implementation of a Multiband Metamaterial-Loaded Reconfigurable Antenna for Wireless Applications

2021 ◽  
Vol 2021 ◽  
pp. 1-21
Author(s):  
Ritesh Kumar Saraswat ◽  
Mithilesh Kumar
Keyword(s):  
High Speed ◽  
Satellite Communication ◽  
Ring Resonator ◽  
Impedance Matching ◽  
Ground Plane ◽  
Satellite System ◽  
Split Ring Resonator ◽  
Split Ring ◽  
System Service ◽  
Wireless Standards

This article presents a multiband antenna with the implementation of a metamaterial split-ring resonator (SRR), quasicomplementary split-ring resonator (CSRR), and slots to achieve octaband characteristics for wireless standards. Multiband features are accomplished by the implementation of the slot approach within the radiating section part and loading the SRR and CSRR cells. The electrical dimension is 0.256λ × 0.176 λ × 0.0128λ (32 × 22 × 1.6 mm3) of the proposed design, at a lower frequency of 2.4 GHz. The proposed design indicates the frequency-band reconfigurability nature by using the switching PIN diode placed at the slotted section of the ground plane. During the OFF state of switching, the element structure resonates in eight wireless communication bands covering various high-speed multiple applications of Internet of Things (IoT) regarding wireless standards S-band WLAN (WiFi, Bluetooth, Z-wave, wireless HART, and WBAN), lower C-band (WAIC, satellite communication transmission application), C-band WLAN, X-band (ITU region 2), Ku-band (direct broadcast satellite system and terrestrial microwave communication system service), and K-band (radar communication application) at 2.4, 4.3, 5.8, 8.5, 11.1, 13.9, 16.1, and 18.9 GHz, respectively, with S11 ≤ −10 dB. The antenna achieves an optimum peak gain of 4.23 dBi and radiation efficiency of 82.78% at operating frequency regarding wireless standards. The average efficiency of the proposed design is more than 70% for all resonant modes. The radiation characteristics (gain/efficiency/patterns/impedance matching) are shown in the stable and improved form at achieved wireless modes.

Microfabrication research at the National Submicron Facility

1983 ◽  
Vol 41 ◽  
pp. 86-89
Author(s):  
E.D. Wolf
Keyword(s):  
Integrated Circuits ◽  
Particle Physics ◽  
High Speed ◽  
New Technology ◽  
High Energy ◽  
High Energy Particle ◽  
New Science ◽  
Wide Range ◽  
Intermediate Domain ◽  
Circuit Function

Most microelectronics devices and circuits operate faster, consume less power, execute more functions and cost less per circuit function when the feature-sizes internal to the devices and circuits are made smaller. This is part of the stimulus for the Very High-Speed Integrated Circuits (VHSIC) program. There is also a need for smaller, more sensitive sensors in a wide range of disciplines that includes electrochemistry, neurophysiology and ultra-high pressure solid state research. There is often fundamental new science (and sometimes new technology) to be revealed (and used) when a basic parameter such as size is extended to new dimensions, as is evident at the two extremes of smallness and largeness, high energy particle physics and cosmology, respectively. However, there is also a very important intermediate domain of size that spans from the diameter of a small cluster of atoms up to near one micrometer which may also have just as profound effects on society as “big” physics.

Vacuum System to Minimize the Specimen Contamination of High-Performance EM

1977 ◽  
Vol 35 ◽  
pp. 68-69
Author(s):  
N. Yoshimura ◽  
K. Shirota ◽  
T. Etoh
Keyword(s):  
Electron Microscope ◽  
High Speed ◽  
High Performance ◽  
High Vacuum ◽  
Vacuum System ◽  
Pump System ◽  
Pumping System ◽  
Diffusion Pump ◽  
Almost All ◽  
Cascade Type

One of the most important requirements for a high-performance EM, especially an analytical EM using a fine beam probe, is to prevent specimen contamination by providing a clean high vacuum in the vicinity of the specimen. However, in almost all commercial EMs, the pressure in the vicinity of the specimen under observation is usually more than ten times higher than the pressure measured at the punping line. The EM column inevitably requires the use of greased Viton O-rings for fine movement, and specimens and films need to be exchanged frequently and several attachments may also be exchanged. For these reasons, a high speed pumping system, as well as a clean vacuum system, is now required. A newly developed electron microscope, the JEM-100CX features clean high vacuum in the vicinity of the specimen, realized by the use of a CASCADE type diffusion pump system which has been essentially improved over its predeces- sorD employed on the JEM-100C.

The on-line use of histogram data for high-speed correction and alignment of electron microscope images

1984 ◽  
Vol 42 ◽  
pp. 556-557
Author(s):  
William Krakow
Keyword(s):  
Power Spectrum ◽  
High Speed ◽  
Direct Memory Access ◽  
Digital Television ◽  
Contrast Transfer Function ◽  
The Past ◽  
High Resolution Tem ◽  
On Line ◽  
Correction Of Astigmatism ◽  
The Fourier Transform

In the past few years on-line digital television frame store devices coupled to computers have been employed to attempt to measure the microscope parameters of defocus and astigmatism. The ultimate goal of such tasks is to fully adjust the operating parameters of the microscope and obtain an optimum image for viewing in terms of its information content. The initial approach to this problem, for high resolution TEM imaging, was to obtain the power spectrum from the Fourier transform of an image, find the contrast transfer function oscillation maxima, and subsequently correct the image. This technique requires a fast computer, a direct memory access device and even an array processor to accomplish these tasks on limited size arrays in a few seconds per image. It is not clear that the power spectrum could be used for more than defocus correction since the correction of astigmatism is a formidable problem of pattern recognition.

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