Applications of Cognitive Radio System

 

Cognitive Radio System is a type of wireless communication system where a transceiver detects the communication channels that are in use. The transceiver then immediately moves into vacant channels, while avoiding occupied ones. These capabilities help to optimise the use of available radio frequency spectrum so it also minimises interference to other users. The occupied channels can be avoided to increase spectrum efficiency and it improves the quality of service (QoS) for other users.

The wireless radio frequency spectrum is a limited resource, normally allocated through a licensing process. The licensed spectrum is not always used ideally. Finally, some bands are overcrowded (GSM) while others are relatively unused (military). Cognitive radio is very efficient to use and to share resources optimally and intelligently.Click here to continue reading

Li-Fi (Light Fedility)

 

   Li-Fi is a wireless communication technology. It’s up to 100 times faster than standard Wi-Fi. It utilizes light to transmit data and position between devices. It is capable of transmitting data at higher speed over visible light, ultraviolet, and infrared spectrum. It is wireless optical networking technology which uses LEDs for transmission of data. Li-Fi is considered as light-based Wi-Fi in which it wi-fi uses radio waves to transmit information instead of light. Click here to continue

Zigbee

 

It is a wireless technology.it is mainly used in controlling and sensor the networks.it is based IEEE 802.15 standard of TG4(task group 4) in 2003. The zigbee has major advantage of low rate data transfer and provide long coverage for wireless application.it is created by zigbee alliance. The zigbee word comes from honeybees zigzag path for enter into the pot likewise in a zigzag manner it will capable of deliver data to the end nodes.Click here to continue reading

Wireless Communication

 

WIFI comes under wireless network protocol based on the IEEE 802.11  standard  , commonly used for LAN( local area networking). The main purpose of wifi is for internet access  , allowing nearly digital devices to exchange of data by radio wave . Wi-Fi uses multiple part of the IEEE 802 protocol. It is designed for interwork seamlessly with its wired sibling Ethernet . The commonly uses radio bands for wifi are 2.4 gigahertz (120 mm) ultra high frequency between(300 megahertz to 3 gigahertz)  and 5 gigahertz (60 mm)super high frequency  between (3 to 30 gigahertz), these radio bands are subdivided into multiple channels. Channels are shared between network but only one transmitter can locally transmit on a  channel at any moment in time.click here to continue reading

Terminologies of Wireless Communication

 

A2DP:ADVANCED AUDIO DISTRIBUTION PROFILE

 The Advanced Audio Distribution Profile specifies the protocols that outline the distribution of prime quality audio content in Asynchronous Connectionless Link (ACL) channels.

AAS:ADAPTIVE ANTENNA SYSTEM

Adaptive Antenna System (AAS) otherwise called Advanced Antenna System may be a technology to alter the network operators to extend the capability of wireless network systems. In addition to it adaptive  antenna systems provide the potential of increased  spectrum potency, extended variety of coverage and better rate of frequency use.Click here to continue reading

 

Body Wearable Antenna

 

The body wearable antenna is designed to function while being worn. These type of antennas are commonly used in wearable wireless communication, bio-medical RF systems etc. Wearable antenna is used within the context of (WBAN) Wireless Body Area Networks . In WBAN, the antenna is the key component which supports wireless communication.That includes in-body communication, on-body communication and off-body communication. A wireless communication between human body and WBAN can be established by a wireless body area network connecting sensor, actuator and Iot node on the human body, or on clothes or under the skin.Wearable antennas can be used by people of all ages, athletes and patients for a continuous monitoring of vital signs, oxygen level and stress level.Click here to continue reading

Cooperative and Secure Wireless Communication

Secure wireless communications are needed in today’s world where we cannot find privacy in any devices we see. So Secretive information is needed with the help of cooperative and secure wireless Communications. Information secrecy is linked with cryptographic secrecy is used for secret-key exchange protocol for wireless networks. Cooperative Communications are used to reduce more power consumption and also increase the capacity of wireless networks.Click Here to continue reading