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In this paper, we implement Bose-Chaudhuri-Hocquenghen (BCH) coding to study the performance of Power Line Channel (PLC) impaired by impulsive noise and AWGN. Quadrature amplitude modulation (QAM) is employed and orthogonal frequency division multiplexing (OFDM) is used as a transmission scheme. Block truncation coding (BTC) is used for the compression of the image. A comparison is made between uncoded...
In this contribution, we investigate the impact of channel correlation on the ergodic capacity, capacity statistics and symbol error rate (SER) for maximal ratio combiner (MRC) multichannel diversity systems over correlated Rayleigh fading channels. We derive exact closed-form expressions for average channel capacity, an upper bound and its asymptotically tight approximation. The capacity statistics...
Transmission of a compressed still images using FFT-OFDM over PLC channels with additive white Gaussian noise (AWGN) and impulsive noise is tackled. Discrete Wavelet Transform (DWT) is used as one of the compression techniques and it is compared with another compression method, which is Block Truncation Coding (BTC). A comparison between the two methods is carried out in terms of compression factor,...
Transmission of wavelet-compressed still images using FFT-OFDM over multipath power line communication (PLC) channels under additive white Gaussian noise (AWGN) and impulsive noise is addressed. Only the low-subbands coefficients were chosen to be transmitted from each decomposition level for compression, rather than using a global threshold for the compression of the wavelet coefficients. A study...
In this paper, we have derived the circular 16-QAM constellation and apply it in Fourier and wavelet based OFDM systems. In order to derive the circular scheme, we first begin with the derivation of the square scheme as the scale of measurement for the purpose of comparisons. It is found out that the power consumption of the circular constellations is lower than the square signals by -2.71dB for a...
Transmission of compressed image data over Gaussian wireless channel using OFDM scheme is addressed. A wavelet thresholding technique based on automatic image quality assessment of image, which was proved to be highly conformed with the human visual evaluation, is utilized to obtain an optimum trade-off between the compression ratio and image quality.
In this work we present a comparative study for the transmission of a wavelet-compressed still image using FFT-OFDM over multipath channels with additive white Gaussian noise (AWGN). Rather than using a global threshold for the compression of the wavelet coefficients, we chose to compress the data by transmitting only the low-pass subbands from each decomposition level. 16-QAM is considered for the...
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