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GFDM-based underwater transmission scheme for image signals

Generalized frequency division multiplexing (GFDM) transmission is an advanced communication scheme, and the main advantages of GFDM are its high spectral efficiency, high throughput, and low latency. In the paper, we design a GFDM based image transmission schemes with perfect and imperfect channel estimations for an underwater multipath fading channel model. Low-density parity-check (LDPC) channel coding is integrated into the proposed GFDM-based underwater image transmission schemes to enhance bit error rate (BER) performance. An adaptive 4 quadrature amplitude modulation (QAM) or 16-QAM, and a power assignment mechanism are integrated into the proposed scheme to achieve high transmission speed or low transmission power. The performance of the peak signal to noise ratios (PSNRs) of the original and received image signals was investigated for the proposed underwater image transmission scheme.