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A New Approach to Reduce PAR by Using S-HNN for OFDM System |
Wang Hai-ming①; Hu Wu-jie②; Feng Ming-hai② |
①Nokia (China) Research Center, Beijing 100013, China;②Beijing University of Posts and Telecommunications, Beijing 100876, China |
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Abstract This paper proposes a new approach to reduce the Peak-to-Average power Ratio(PAR) value of multi-carrier/OFDM with a new kind of adaptive soft feedback Stochastic Hopfield Neural Network (S-HNN). By adopting new neural output function and random state disturbance, the system performance is improved greatly. Furthermore, it can be implemented easily compared to the traditional HNN method. By parameter adjustment, the lowest PAR can be found. So it is an effective and practical algorithm for OFDM system.
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Received: 31 August 2005
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