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7th International Conference on MEMS, NANO and Smart Systems (ICMENS 2011)

作者： Agarwal, Arun Patra, S. K. Siksha O Anusandhan Univ ITER Coll Dept Elect & Commun Engn Bhubaneswar 751030 Odisha India Natl Inst Technol Dept Elect & Commun Engn Rourkela 769008 Odisha India

ISBN: (纸本)9783037853122

Radio broadcasting technology has evolved rapidly over the last few years due to ever increasing demands for as high quality sound services with ancillary data transmission in mobile environment. The Eureka-147 Digital Audio Broadcasting (DAB) system with coded OFDM technology accomplish this demand by making receivers highly robust against effects of multipath fading environment. In this paper, we have analyzed the performance of DAB system conforming to the parameters established by the ETSI (EN 300 401) using frequency interleaving and different coding rates in different transmission channels. The results show that interleaving is essential for the forward error correction to work properly and an increased coding rate makes the system more flexible without increase in the receiver complexity.

关键词： DAB OFDM Multipath effect frequency interleaving coding rates

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Capacity Expression and Power Allocation for Arbitrary Modulation and coding rates

Capacity Expression and Power Allocation for Arbitrary Modul...

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IEEE Wireless Communications And Networking Conference

作者： Weisi Guo Siyi Wang Xiaoli Chu University of Warwick United Kingdom University of Sheffield United Kingdom

ISBN: (纸本)9781467359382

This paper addresses the dichotomy that exists in the analysis of wireless channels, which exists between employing: the tractable Shannon capacity bound and the accurate simulated capacity of modulation and coding schemes (MCSs). By considering the effects of mutual information saturation in modulation schemes and the efficiency of error correction codes, the paper proposes a new tractable capacity expression that can accurately represent any MCS and adaptive combinations. To demonstrate this methodology, the paper considers the adaptive MCS capacity for the Long-Term-Evolution (LTE) system. The potential benefit is that system-level optimization can employ the more accurate capacity expression. In the second part of the paper, the proposed capacity expression is applied to optimize power allocation to the parallel, channels of a MIMO system. The results show that when mutual information saturation occurs, neither the water-filling nor channel inversion schemes are optimal. In fact the optimal power allocation is a combination of the two aforementioned schemes, switching adaptively between their relative merits.

关键词： MCSs MIMO coding rates

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HIGH-RATE PUNCTURED CONVOLUTIONAL-CODES FOR VITERBI AND SEQUENTIAL-DEcoding

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IEEE TRANSACTIONS ON COMMUNICATIONS 1989年第11期37卷 1113-1125页

作者： HACCOUN, D BEGIN, G Department of Electrical Engineering Ecole Polytechnique de Montreal Montreal QUE Canada

Abstruct-This paper investigates high-rate punctured convolutional codes suitable for Viterbi and sequential decoding. Results on known short-memory codes M I 8 discoveredby others are extended. Weight spectra and upper bounds on the bit error probability of the best known puncturedcodes having memory 2 I M I 8, and coding rates 2/3 5 R I 7/8 *** discoveredrate-2/3 and3/4 long-memory punctured convolutional codes with 9 % M s 23 are provided together with the leading terms of their weight spectra and their bit error performance bounds. Some results of simulation with sequentialdecod- ing are given.

关键词： .upper bounds coding rates bit error performance short-memory Weight spectra puncturedcodes

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RATE COMPARISON OF VECTOR CHAIN coding AND RUN-LENGTH coding FOR LINE DRAWINGS

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ELECTRONICS LETTERS 1989年第25期25卷 1722-1723页

作者： LIU, K PRASAD, R Delft Univ. of Technol. Netherlands

Quantitative analysis and comparison of the coding rates of vector chain coding (VCC) and run-length coding (RLC) for line drawings are performed. The critical point of the picture complexity is derived at which VCC b... 详细信息

关键词： codes coding rates computer graphics computer graphics critical point digitisation process encoding image processing line drawings picture complexity picture processing quantisation run-length coding vector chain coding

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MODEL FOR LINE-DRAWING GRAPHICS AND DIFFERENTIAL ANGLE DISTRIBUTIONS

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ELECTRONICS LETTERS 1989年第22期25卷 1473-1474页

作者： LIU, K Dept. of Electr. Eng. Delft Univ. of Technol. Netherlands

A model for line-drawing graphics is presented to study the performance of chain coding, such as quantisation distortions and coding rates. A differential angle distribution of line drawings is proposed based on this model and verified by experiments. The distribution is necessary for the analysis and design of differential chain coding.

关键词： chain coding coding rates differential angle distributions encoding line-drawing graphics model picture processing quantisation distortions

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Design and Implementation of Low-Rate Turbo coding and Decoding

Design and Implementation of Low-Rate Turbo Coding and Decod...

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IEEE/CIC International Conference on Communications in China (ICCC)

作者： Wei, Minglong Ren, Defeng Huang, Qin Xian Univ Posts & Telecommun Sch Commun & Informat Engn Xian Peoples R China

ISBN: (纸本)9798350378412

Turbo coding, with its performance closely approaching the Shannon limit, is an excellent modern error-correcting coding. In recent years, the 6th generation (6G) mobile communication has put forward higher requirements for the coding rate range and Bit Error Ratio (BER) performance. To meet these requirements, a low-rate Turbo encoding and decoding scheme has been designed and implemented. By puncturing, the designed scheme supports a wide range of coding rates (i.e., 1/9 to 1). The feasibility and effectiveness of the designed scheme have been verified through the BER performance simulations and Field Programmable Gate Array (FPGA) implementation.

关键词： Turbo code coding rates Max-Log-MAP FPGA

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