BMEF – Infrastructure for students & their studies

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Confused?Which course to choose? Career choices are life choices. Take them seriously. Come, join BMEF and do it correctly. “Find out what you like doing best and get someone to pay you for doing it”. Education is a journey not a race. Be a part of this beautiful journey of life with BMEF. Find out perfect course for you at BMEF, where you learn and leave behind legacy that people will follow. Bhagwan Mahavir Education Foundation (BMEF) is a well known Trust established in 2002 .It’s main objective is to provide Quality Education to the students of Gujarat and undertake all the activities for upliftment and job oriented education. The foundation was registered on 24 Jan 2002 at SURAT.


Under BMEF trust they have 3 engineering colleges. BMCET – Bhagwan Mahavir College of Engineering And TechnologyMSCET – Mahavir Swami College Of Engineering And TechnologyBAIT – Bhagwan Arihant Institute and Technology All colleges teach various courses like Engineering & Technology, Science & Te…

Cognitive Radio Science


The idea of cognitive radio was first given by the Joseph Mitola and Gerald Q. Maguire in 1999. Cognitive radio is Software Defined Radio (SDR) or Dynamic Spectrum Access (DSA) a technology where radios detect white space in spectrum and access based on the priority of users. Cognitive radio is one of the new long term as well as good performance development take place in radio communication technology. Cognitive radio minimizes the spectral congestion. Cognitive radio works most effectively works in communication system. Cognitive radio able to perform task of the spectrum, detect frequencies and adjust the parameters according to modern signal processing techniques, according to the definition of cognitive radio. Cognitive radio allows the sharing of spectrum much more efficiently and used spectrum dynamically and intelligently. Cognitive radio can manage spectrum themselves without human intervention.

I.     COGNITIVE RADIO

CRs are highly agile wireless platforms capable of autonomously choosing operating parameters based on both prevailing radio and network conditions. Consequently, CRs have the potential to revolutionize how devices perform wireless networking. For instance, CRs allow radios operating on different protocols and standards to communicate with each other. This is known as interoperability. Furthermore, CRs are capable of transmitting in unoccupied wireless spectrum while minimizing interference with other signals in the spectral vicinity; that is, DSA

The spectrum management process consists of four major steps:
  1. Spectrum Sensing:
ð A Cognitive Radio user defined unused portion in frequency spectrum. Therefore, the CR user should identify the free space in spectrum bands, take their information and sense the spectrum holes. Sensing is necessary if the device is to change its operation based on its current knowledge of environment.

  1. Spectrum Decision:
ð CR users can allocate a channel based on the spectrum available or not. This allocation not only depends on spectrum availability, but it is also can be determined by internal (and possibly external) policies.

  1. Spectrum Sharing:
ð Multiple CR users trying to access on spectrum, CR network access should be coordinated in order to prevent multiple users colliding in overlapping portions of the spectrum.
ð Which decide the secondary user can use the spectrum for some particular time.

  1. Spectrum Mobility:
ð If the specific portion of the spectrum in use is required by a primary user, the communication need to be continued in other white space of the spectrum.
Which the process is to exchanges its frequency operation for cognitive radio user.

Figure 1: Cognitive Engine Components in Cognitive Loop

Professor,
Robin Hojiwala,
Mahavir Swami College of Polytechnic

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