Viterbi Algorithm Decoder Enhanced with Non-transmittable Codewords is one ofthe best decoding algorithm which effectively improves forward error correctionperformance. HoweverViterbi decoder enhanced with NTCs is not yet designed towork in storage media devices. Currently Reed Solomon (RS) Algorithm is almostthe dominant algorithm used in correcting error in storage media. Conversely,recent studies show that there still exist low reliability of data in storagemedia while the demand for storage media increases drastically. This studyproposes a design of the Soft Viterbi Algorithm decoder enhanced withNon-transmittable Codewords (SVAD-NTCs) to be used in storage media for errorcorrection. Matlab simulation was used in this design in order to investigatebehavior and effectiveness of SVAD-NTCs in correcting errors in data retrievingfrom storage media.Sample data of one million bits are randomly generated,Additive White Gaussian Noise (AWGN) was used as data distortion model andBinary Phase- Shift Keying (BPSK) was applied for simulation modulation.Results show that,behaviors of SVAD-NTC performance increase as you increasethe NTCs, but beyond 6NTCs there is no significant change and SVAD-NTCs designdrastically reduce the total residual error from 216,878 of Reed Solomon to23,900.
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