Research of Suppressing the Noise in Digital Holographic Storage System Using Digital Signal Processing Method

Based on the complicated noise characteristics in digital holographic storage system(DHSS), some methods of channel code in digital communication are introduced. In order to improve effect of traditional modulation code, a new modulation-array (MA) code and a novel soft-decision method corresponding to MA code are proposed for data processing in DHSS. Also developed based on the MA code is a new iterative decoding algorithm, which integrates principles of modulation code detection, soft-decision, array code error-correction and Turbo code decoding. The experimental results show that this MA code can be employed in the system and can reduce effectively the influence of noise.