Zhu Aimin

A Modified Belief Propagation Decoding Algorithm of LDPC Codes for Fast Convergence

The Belief-Propagation decoding algorithm for Low-Density Parity Check Codes is analyzed and the convergence characteristic of this algorithm is researched. A modified Belief-Propagation decoding algorithm aiming at decreasing the number of iteration is proposed. Simulation result shows that the number of iteration of the proposed algorithm is only half of that of the standard one at expense of little loss in performance.

A New Fusion Method of Palmprint and Palmvein

This paper introduces a new method for fusing palmprint and palmvein. The focus of image fusion is placed on the application of neurodynamics of vision models, and the characteristics of the bimodal cells of rattlesnakes are researched. An image acquisition device which can collect palmprint and palmvein images in the same position and at the same time is deviced, and a small palmprint and palmvein database is built by this device. Some experiments have been done to evaluate this fusion method on the palmprint and palmvein database.

Design of Optimal LDPC Code for the System of MDPSK Concatenated with LDPC Codes

The combined demodulating and decoding algorithm of the system of M-ary Differential Phase-Shift Keying (MDPSK) concatenated with Low-Density Parity Check Codes in AWGN channels is analyzed in this paper. Concentrating on the above algorithm, we propose a design method of optimal LDPC code based on Extrinsic Information Transfer Chart. Meanwhile, as an example, degree distribution of LDPC code at a rate of one-half bit per channel is given for both MDPSK and pi/4 DQPSK system concatenated with Low-Density Parity Check Codes.