Double Layer Encoded Encrypted Data on Multicarrier Channel
This study proposes Orthogonal Frequency Division Multiplexing (OFDM), endorsed by encryption and concatenated Error Correction Codes (ECC). OFDM, as the name suggests exploits the carriers orthogonality properties and Frequency Division Multiplexing (FDM) caters to the bandwidth requirements for the broadband applications. To reduce the errors due to the channel noise conditions, concatenated codes utilizing Reed Solomon (RS) codes and convolutional codes are used. Its encoded output is encrypted using the chaotic means to espouse discretion before passing through OFDM channel. Error performance of the scheme is analysed using Additive White Gaussian Noise (AWGN) channel. Comparative graphs are plotted for the performance of Bit Error Rate (BER) on different modulation schemes with different inner and outer code rates. For performance measurements, metrics like BER and Correlation values are computed.
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