Johnny Wei-Hsun Kao

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The algorithm and the results of a blind multiuser detector using a machine learning technique called support vector machine (SVM) on a chaos-based code division multiple access system is presented in this paper. Simulation results showed that the performance achieved by using SVM is comparable to existing minimum mean square error (MMSE) detector under(More)
This paper presents the algorithm and the result of a novel demodulation technique for a chaos-based CDMA system. Standard CIC filters are applied for interpolating the transmitted signal, in order to retrieve more sample points without increasing the systempsilas bandwidth. Then the original binary message for each user is retrieved by means of a support(More)
In this paper, we present the algorithm and the results of a modified support vector machine (SVM) detector on a Chaos-based code division multiple access (CDMA) system so that it has less computational complexity than the conventional correlator receiver. This is achieved through the recursive feature elimination (RFE) algorithm, which is commonly used for(More)
This paper outlines a novel iterative decoding technique for a rate K/N convolutional code based on recurrent neural network (RNN) with stopping criterion. The algorithm is introduced by describing the theoretical models of the encoder and decoder. In particular this paper focuses on the investigation of a stopping criterion on the iterating procedure in(More)
This contribution presents a comparison between two realizations of chaos-based multi-user direct-sequence spread spectrum (DS-SS) system in digital signal processor (DSP) technology. The first realization is a conventional correlator receiver and the second is a new support vector machine (SVM) receiver. The two realizations were aimed at examining the(More)
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