Estimation of BER and SNR before and after Encryption in OFDM (Orthogonal Frequency Division Multiplexing

Abstract

This paper display a brand new encryption scheme applied at the physical layer of wi-fi networks employing OFDM. The new scheme obfuscates subcarriers for dummy statistics and resequences the training image by using a new steady sequence. In this exploration work, new mathematical modeling is used in the suggested secure routing algorithm. Moreover, the newly proposed OFDM technique has two different phases for carrying out two different activities.Subcarrier obfuscation renders OFDM transmission greater steady and random while training symbol resequencing protects the entire body layer packet but does no longer have an effect on the normal capabilities of synchronisation and channel evaluation of legitimate customers while stopping eaves dropper from performing these functions.

The security evaluation represent the system is a sturdy to various attacks by reading the hunt space the usage of an exhaustive key seek. Our scheme explains a higher performance modulation technique within the phrases of seek space, also lesser price and complexity in comparison with the different OFDM physical layer encryption schemes. The scheme has option for users to customize the security degree and key structure according to the hardware useful resource. It’s low complexity nature makes the scheme appropriate for useful resource confined devices. Details of realistic layout concerns are highlighted in applying the technique to an IEEE 802.11 OFDM devices.