Abstrakt

A N-Radon Slantlet Transforms Based OFDM System Design with PCC Algorithm to improve the Performance

Srithar.A

A N-Radon Slantlet Transforms Based mapper has the ability to increase orthogonality of subcarriers, it is non sensitive to channel parameters variations, and has a small constellation energy compared with conventional FFT, N-RADON, DMWT based orthogonal frequency division multiplexing. SLT is used in OFDM systems to reduce inter-symbol interference (ISI) and inter-carrier interference (ICI). This eliminates the need for cyclic prefix (CP) and increases the spectral efficiency of the design. It works as a good interleaver, which significantly reduces the bit error rate (BER). In this paper both NRAT mapping technique and SLT modulator with PCC algorithm are implemented in a new design of an OFDM system. The new structure was tested and compared with conventional FFT based OFDM, N Radon transform-based OFDM, and SLT-based OFDM for additive white Gaussian noise (AWGN) channel, flat fading channel (FFC), and multipath selective fading channel (SFC). The proposed system has increased orthogonality, the spectral efficiency, reduced ISI and ICI, and improved BER performance compared with other systems.