Mu Zhang's research while affiliated with Singapore University of Technology and Design and other places

Publications (6)

Article
Full-text available
We propose a coding method to transform binary sequences into DNA base sequences (codewords), namely sequences of the symbols A, T, C and G, that satisfy the following two properties • Run-length constraint. The maximum run-length of each symbol in each codeword is at most three; • GC-content constraint: The GC-content of each codeword is close to...
Conference Paper
Full-text available
This paper presents novel soft-decision decoding (SDD) of error correction codes (ECCs) that substantially improve the reliability of DNA-based data storage system compared with conventional hard-decision decoding (HDD). We propose a simplified system model for DNA-based data storage according to the major characteristics and different types of err...
Article
This paper addresses binary message passing (MP) decoding for non-binary low-density parity-check (NB-LDPC) codes based on the binary image of Galois field symbols. The parity-check matrix of NB-LDPC codes in binary form is used to perform MP. The corresponding non-binary check node (CN) update and variable node (VN) update can thus be decomposed t...
Conference Paper
We propose a systematic code design method for constructing efficient spectrum shaping constrained codes for high-density data storage systems. Simulation results demonstrate that the designed codes can achieve significant spectrum shaping effect with only around 1% code rate loss and reasonable computational complexity.
Article
This paper proposes systematic code design methods for constructing efficient spectrum shaping codes with the maximum runlength limited constraint k, which are widely used in data storage systems for digital consumer electronics products. Through shaping the spectrum of the input user data sequence, the codes can effectively circumvent the interact...
Article
Two dimensional inter-symbol-interference (2D-ISI), consisting of ISI in the down track direction and inter-track interference (ITI) along the cross-track direction, is a major factor that severely degrades the performance of ultra-high density magnetic recording systems. Due to its superior performance and the protograph structure which facilitate...

Citations

... DNA-based storage shows a strong correlation and promising direction for IoT communication technology [18]. There have been many references aimed at constructing DNA sequences with multiple constraints [23,24,3,7,6,20]. For instance, Song et al. [23] designed a novel method to translate binary sequences into DNA sequences that satisfy the constraints of GC-content and run-length. ...
... The path metric represents the quantized components in the demodulator [6]. The optimum decision is based on normalized metric of the synchronized space [8]. The scaled regions are designed to achieve the uniform phase [7,8]. ...
... This strategy is adapted to general channels, as discussed in [11]. In [12], the authors used the binary image of the nonbinary PCM to decode NB-LDPC codes. ...
... Our designed spectrum shaping codes can be easily implemented on various consumer electronics devices, such as magnetic tape and other data storage products such as ultramobile HDDs [3,4,5,6]. The above described code designs and constructions are all done off-line, and once the codes are designed, the encoder and decoder can be implemented based on simple look-up tables. ...
... of alleviating different types of interference and channel nonuniformity in modern storage systems, e.g., two-dimensional magnetic recording (TDMR) and three-dimensional Flash systems. One example is mitigating inter-track interference in TDMR systems [4] through specific non-binary LDPC code constructions as in [5]. Various MD spatially-coupled (MD-SC) codes were presented in the literature [6]- [9]. ...