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Abstract. High Peak to Average Power Ratio (PAPR) is the major disadvantage in Orthogonal Frequency Division Multiplexing (OFDM). OFDM is extensively used in wireless communication systems due to its excellent performance. To reduce high PAPR, various techniques like clipping, companding, coding, etc. have been proposed. Companding technique effectively reduces the PAPR. In this paper, we propose new non-linear companding transforms which reduce PAPR efficaciously and are much more flexible when compared to other existing transforms. The theoretical analysis and simulation results of the proposed scheme are presented.

In many times we have encountered the entry of strangers pretending as parents, entering into college premises and creating issues. To avoid these kinds of issues, security guards and surveillance cameras alone are not enough and this cannot be controlled unless the entry of people record is computerized and details of the person are recorded. In this computerized system, software is created to enter the details and the reason for the visitor to visit. In this software, the details of the visitor will be updated in a secure manner and be stored for any future reference. If the visitors have vehicles, the vehicle details are also should be given in the request page. In this computerized method, all the details will be given in prior by the guest and will be saved securely for future reference. The entry monitoring system will import details from the administrative data processing office, the affirmed work power database as an essential inquiry table. In the end, we can know all the details about the visitors like their purpose to visit, the person they like to meet, the duration of their stay inside the campus, everything stored in our database securely in case of ant future needs.

No abstract