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Convolutional turbo code (CTC) has been adopted as an optional channel coding scheme for wireless metropolitan area networks (WMAN) and digital video broadcasting (DVB) owing to its powerful error correction capability and flexibility. In spite of the fact that the internal interleaver of CTC mainly affects the characteristics of the code, interleaving parameters, especially for small and moderate...
In order to improve the bit error rate performance of one-dimensional coded modulations using chaotic maps, an optimization process is performed in this paper. Based on the designing methods of conventional trellis coded modulation the minimum free Euclidean distance between signal sequences of chaos-based coded modulations is maximized. Computer search method is then used to find the coded modulations...
To find the optimal combination of parameters in product or process design, there are always more than one response needed to be optimized simultaneously, which is called as optimization of multi-response problems. TOPSIS (technique for order preference by similarity to ideal solution) method, as a multiple attribute decision making (MADM) methodology, is often used for solving problems with multivariate...
gm/ID analog circuit design methodology for all operation regions of the MOS transistor based on SPICE simulations was proposed in years. In this paper, a novel method - distance method, which is based on the gm/ID design methodology will be introduced to the tradeoff and optimization in a circuit design. With distance method, the tradeoff and optimization among lots of performance parameters will...
Optimum resource allocation is essential for wireless cooperative networks. Instead of limiting to energy optimization, we recently investigated the two-dimensional energy and location optimization with arbitrary number of relays, and in the presence of possible direct source-destination link. In this paper, we consider several practical issues in such a 2-D optimization. These issues include the...
This paper explores the attributes, layering models and objective functions in cross layer designs for mobile ad hoc wireless networks by taking all the statistical characteristics and constraints from the physical (PHY) layer, media access control (MAC) layer and network (NET) layer into consideration. This paper reviews the entire network optimization across all the PHY/MAC/NET layers. At the PHY...
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