Pinaki Sankar Chatterjee

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Cognitive Wireless Sensor Networks follow IEEE 802.22 standard which is based on the concept of cognitive radio. In this paper we have studied the Denial of Service (DOS) attack. Spectrum Sensing Data Falsification (SSDF) attack is one such type of DOS attack. In this attack the attackers modify the sensing report in order to compel the Secondary User (SU)(More)
— Sign Language is the language of deaf. This paper discusses an approach for translating Sign Language videos to its corresponding simple sentence in English. There are different types of sign languages spread all over the world. American Sign Language (ASL) is one of the sign languages. ASL is used by deaf Americans. We have collected some ASL videos in(More)
Sign Language is the language of deaf. There are different types of sign languages spread all over the world. American Sign Language (ASL) is one of the sign languages. ASL is used by deaf Americans. We had created a system that translates sign language videos to simple sentence in English. This system is taking a lot of time for mapping the sign language(More)
CWSNs provide better bandwidth utilization as compared to a normal wireless sensor network because they use opportunistic spectrum access to transfer data. Opportunistic spectrum access is a very promising and spectrum efficient communication process when there is bur sty traffic in the network. IEEE 802.22 is the first standard based on the concept of(More)
Now a days, selfish nodes is a huge problem in WSNs. In Wireless Sensor Network (WSN) communication, every node forwards the data packets to neighboring nodes and use up its battery power, bandwidth and memory space. All the nodes transmits packets to other nodes according to their necessities in the ideal situation. Presence of selfish node in the network(More)
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