Sekson Timakul

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This paper presents a new design of irregular LDPC codes that supports arbitrary block length. We propose the efficient construction method when nonprime size sub-matrices are used. The problem where GCD (L<inf>1</inf>,L<inf>2</inf>) &#x2260; 1 that left unsolved has been tackled. We also consider the case GCD (L<inf>1</inf>,L<inf>2</inf>) = 1 but(More)
This paper presents overlapping techniques designed for a compact hardware LDPC decoder with MS algorithm. The design is applicable to IEEE 802.11n standard. We elaborate how to reduce hardware and cycle time between row and column operation. The hardware utilization can be better enhanced and 16&#x2013;40% cycle time reduction compared to a non-overlapping(More)
In LDPC code design, the structure of code's parity check matrix can be very crucial to code performance. In this paper, we have investigated a simple designed parity check matrix when the code is applied to a PMR channel of a storage system. Belief propagation algorithm and min-sum algorithm are two major decoding algorithms used to benchmarked the code's(More)
This paper presents an alternative a method for designing a parity matrix of low density parity check codes. The proposed method can be viewed as a generalized version of Sridara-Fuja-Tanner (SFT) technique which is ideal for regular quasi cyclic code design. Upon the current investigation, the designed code has delivered a comparable BER-SNR performance(More)
Nowadays, Wireless Body Area Network (WBAN) has become an interesting area of researchers since it can facilitate medical experts to provide a real-time health monitoring. The increasing of elder population is the main driven factor in implementing the medical intelligent services. Application of intelligent medical care system in the disaster environment(More)
The Discrete Cosine Transform (DCT) is significantly of interest in the area of image compression according to its high compaction energy. It has become the core of many international standards such as JPEG, H.26x and the MPEG family [1-3]. In both software and hardware implementations, there appear many fast algorithms to speed up the computation of DCT. A(More)
This paper presents a simple method in designing a parity matrix of low density parity check codes. According to its use the use of arithmetic sequence is ideal for high rate code with no existing of cycle 4. The design is applicable to array code, modified array code, and quasi cyclic code. Upon the investigation, the designed code has delivered a similar(More)
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