UP GRADED CONVOLUTION ERROR DIMINUTION CODE PERFORMANCE IN SEA WATER COMMUNICATION

Abstract

Quality assurance of an image is an important task in underwater transmission systems. Underwater channel is characterized by speckle noise and multipath currents which   lead to variations in Doppler frequency and also changes the distance between the nodes. As the reliability of an image in an acoustic  channel can be judged in terms of Peak Signal to Noise Ratio (PSNR)   and low Mean Square Error (MSE),Structural Similarity Index(SSIM),channel, Signal to Noise Ratio requirement, Band width efficiency  can be obtained by employing suitable modulation techniques or efficient fault reduction coding techniques. While considering design and implementation fault reduction coding techniques are more prominent. This paper proposes a new channel coding technique that ensures secrecy , comparatively  good PSNR low MSE, high SSIM .  This paper addresses the comparison of proposed Upgraded Convolution code with convolution code, Reed Solomon(RS)code ,  Turbo code, Low Density Parity  Check code (LDPC) for transmission of JPEG image through underwater acoustic channel  by using frequency hopped M-ary FSK modulation (FH M-ary FSK).