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raptor code-Enabled Reliable Data Transmission for In-Vehicle Power Line Communication Systems With Impulsive Noise

IEEE COMMUNICATIONS LETTERS 2017年第10期21卷 2154-2157页

作者： Xu, Zhaopeng Yang, Chuanchuan Tan, Zhongwei Sheng, Zhengguo Peking Univ State Key Lab Adv Opt Commun Syst & Networks Beijing 100871 Peoples R China Univ Sussex Dept Engn & Design Brighton BN1 9RH E Sussex England

With the rapid development of in-vehicle data transmission systems, the power line communication (PLC) technology is considered as a good alternative due to the reduction of cable harness. However, PLC suffers from severe impulse noise, which hinders the correct reception of data packets, and hence, leads to a poor transmission performance. In this letter, we propose a raptor code-enabled data transmission scheme for different traffic classes in in-vehicle PLC systems. Simulation results show that the proposed scheme is suitable for in-vehicle data transmission and can provide good protection against the impulsive noise, while a considerable reception overhead is needed.

关键词： In-vehicle power line communication (PLC) impulsive noise raptor code traffic class

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raptor code for Downlink Cooperative Wireless Cellular Networks

Raptor Code for Downlink Cooperative Wireless Cellular Netwo...

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68th IEEE Vehicular Technology Conference

作者： Zhang, Hongtao Kuo, Geng-Sheng (G. S. ) Beijing Univ Posts & Telecommun Telecommun Engn Sch Beijing 100088 Peoples R China Natl Chengchi Univ Taipei Taiwan

ISBN: (纸本)9781424417223;9781424417216

In the existing literatures on cooperative relay system, the coding scheme adopts the conventional fixed-rate code (traditional code). This paper first studies the rateless code, raptor code, to cooperative wireless cellular system. In particular, we study the efficiency, reliability, and robustness of cooperative communication in a wireless cellular downlink environment by employing a new scheme based on combining a raptor code with distributed space-time block code (DSTBC), when channel state information is not available at the transmitter. Considering the flexible code rate characteristic, we find a new measurement, total time slice, to evaluate the performance. Therefore, the number of total time slices at transmitting exactly and the average bit error rate (BER) of cooperation are presented by applying various encoding schemes. The time division multiple access scheme is proposed with half duplex mode. Based on theoretical analyses and simulation results, we show that without channel state information at the transmitter, the cooperative wireless cellular system using raptor code and DSTBC yields significant performance gain, i.e., reducing the total transmission time and energy consumption, even in a low signal-to-noise ratio (SNR) environment.

关键词： Rateless code raptor code Cooperative diversity Distributed space-time block code (DSTBC)

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raptor code for Wireless Ad Hoc Vehicular Safety Broadcast

Raptor Code for Wireless Ad Hoc Vehicular Safety Broadcast

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Globecom Workshops

作者： Abdullah, Nor Fadzilah Piechocki, Robert J. Doufexi, Angela Univ Bristol Ctr Commun Res Bristol BS8 1UB Avon England

ISBN: (纸本)9781424488650

This paper proposes an implementation of systematic raptor code in an ad hoc V2V (vehicular-to-vehicular) environment for post-crash safety broadcast. This is to address the latency problem caused by use of repetition code in a high speed vehicular environment for time-sensitive safety applications. The highly dynamic topology and challenging RF behavior of vehicular networks necessitate the use of a robust error control mechanism even with the use of spatial diversity techniques such as STBC-MIMO scheme. A cross-layer simulator model is used to evaluate the delay performance of raptor codes against a low complexity repetition code. The numerical analysis demonstrates that the end-to-end delay performance is significantly reduced when raptor codes are used, especially at higher distances from the source node. This is true in the case of single antenna as well as multiple antenna schemes.

关键词： WAVE IEEE 802.11p raptor code MIMO

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Efficient GF(256) raptor code Decoding for Multimedia Broadcast/Multicast Services and Consumer Terminals

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IEEE TRANSACTIONS ON CONSUMER ELECTRONICS 2012年第2期58卷 356-363页

作者： Mladenov, Todor Nooshabadi, Saeid Kim, Kiseon GIST Sch Informat & Commun Kwangju 500712 South Korea GIST Dept Nanobio Mat & Elect Kwangju 500712 South Korea Michigan Technol Univ Dept Elect & Comp Engn Houghton MI 49931 USA Michigan Technol Univ Dept Comp Sci Houghton MI 49931 USA

The past few years have seen a tremendous growth in the network connectivity in the consumer electronics market leading to unprecedented increase on the Internet data traffic. The main service contributing to that enormous information flow is mobile multimedia delivery for consumer devices. The fountain codes and their derivative raptor code in particular, are a preferred coding technology for forward error correction (FEC) at the application layer of Multimedia Broadcast/Multicast Service (MBMS) systems. Currently, a next generation Galois Field GF(256) raptor code has been specified for these services. The new rateless code aims at further reducing to a minimum the redundant FEC information compared with its well-established predecessor - raptor code. However, this comes at the expense of increased decoding complexity. The main contribution of this manuscript is a new, optimized version of the inactivation decoding Gaussian elimination algorithm (IDGE) over GF(256) finite field, which offers significant decoding performance improvement. To prove and demonstrate the efficiency of the newly proposed algorithm, the manuscript analyzes and compares the complexity and the performance of the GF(256) raptor code with respect to raptor code. The simulation experiments are performed on both personal computer and embedded system platform ends of the consumer electronics market. Various memory mapping schemes are considered. Additionally, the manuscript demonstrates the behavior of the GF(256) raptor code in a real time MBMS system scenario.

关键词： GF(256) raptor code raptor code MBMS FEC Inactivation Decoding IPTV Gaussian Elimination

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raptor code to mitigate Pilot contamination in Massive MiMo 9th

Raptor code to mitigate Pilot contamination in Massive MiMo

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9th International Conference on Ambient Systems, Networks and Technologies (ANT) / 8th International Conference on Sustainable Energy Information Technology (SEIT)

作者： Benzid, Djedjiga Kadoch, Michel ETS Dept Elect Engn Montreal PQ H3C 1K3 Canada

Very large multi- input multi- output or massive MiMo (m-MiMo) is a promising approach to enhance energy efficiency for next generation wireless network 5G. However, m-MiMo suffers from pilot contamination which limits its performance. To resolve this issue, a new scheme is proposed in the present article, in which receiver uses raptor decoded symbols conjointly with Minimum Mean Square Error (MNISE) technique. This method does not require pilot symbols at receiver to estimate the channel. Simulation results agree that the new system performs the optimal case when information of channel is perfectly known at the receiver. (C) 2018 The Authors. Published by Elsevier B.V.

关键词： 5G Massive MiMo Pilot contamination channel state information raptor code iterative decoding LDPC code fading channels

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A new leader-based multicast scheme with a raptor code in IEEE 802.11 multi-rate WLANs

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EURASIP JOURNAL ON WIRELESS COMMUNICATIONS AND NETWORKING 2014年第1期2014卷 1页

作者： Kim, Dongwan Boudriga, Noureddine An, Sunshin Korea Univ Sch Elect Engn Seoul 136701 South Korea Sch Commun Engn SupCom Ariana Tunisia

Multimedia streaming using a multicast scheme over IEEE 802.11 multi-rate wireless local area networks (WLANs) faces many challenges owing to the heterogeneous channel conditions of receivers. Although many multicast schemes have been proposed to support multimedia streaming over multi-rate WLANs, those schemes do not deal with multicast transmission efficiently. In this paper, a new leader-based multicast scheme with a raptor code is proposed. The proposed scheme consists of a leader selection block, a scalable video coding (SVC) block with unequal error protection (UEP), and a link adaptation block with a raptor code. In the proposed scheme, one of the multicast group members is selected as a multicast group leader according to a leader cost, and then link adaptation operates between the multicast transmitter and the multicast group leader. In addition, SVC, UEP, and raptor code mechanisms are applied to guarantee the minimum required performance of multicast group members. The proposed scheme aims to enhance the link utilization and guarantees the minimum quality-of-service requirement of multicast group members. Simulation results show that the proposed scheme performs better than previous multicast schemes.

关键词： Leader-based multicast raptor code Link adaptation Unequal error protection IEEE 802.11 multi-rate WLANs

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Energy-efficient network reprogramming scheme with raptor code by using transmission power control in WSNs

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JOURNAL OF ENGINEERING-JOE 2014年第4期2014卷 173-175页

作者： Kim, Dongwan An, Sunshin Korea Univ Dept Elect & Elect Engn Anam Campus145 Anam Ro Seoul 136701 South Korea

In wireless sensor networks, the necessity of reprogramming becomes more and more important for variety of purposes. However, the reprogramming produces a large amount of data and causes large energy consumption and interference. In this Letter, we propose an energy-efficient reprogramming scheme with raptor code by using transmission power control. By selecting proper relay nodes, relay nodes' transmission power and raptor code overhead, the proposed scheme minimises energy consumption while guaranteeing reliable transmission. This is verified by comparing it with conventional schemes.

关键词： wireless sensor networks codes telecommunication power management telecommunication control power control reliable transmission relay nodes interference energy consumption WSN wireless sensor networks transmission power control raptor code network reprogramming scheme

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Design of Shortwave Broadband OFDM Communication System Based on raptor code

Design of Shortwave Broadband OFDM Communication System Base...

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Conference on the Future Computer and Control Systems

作者： Liao, Shengyu Sun, Guangmin Zhao, Dequn Guo, Qiang Beijing Univ Technol Dept Elect Engn Beijing 100124 Peoples R China

ISBN: (纸本)9783642293894

A design scheme for shortwave broadband OFDM system based on raptor code is proposed. raptor code is utilized to improve the channel capacity and erasure performance, as well as increasing the bit-rate. In addition, OFDM is applied to increase the spectrum efficiency of the shortwave broadband communication system. The experiment results demonstrate that the proposed system has the better performance on error resilience and the transmitted bit-rate.

关键词： raptor code OFDM Shortwave Communication System

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Work In Progress: A New Algorithm to Improve the Decoding Success Probability of raptor code 9

Work In Progress: A New Algorithm to Improve the Decoding Su...

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9th International Conference on Communications and Networking in China (CHINACOM 2014)

作者： Li, Huihui Li, Xiangying He, Pei Yi, Shanqiang Yang, Dewei Liu, Huafeng Beijing Inst Technol Sch Informat & Elect Beijing Peoples R China Res Ctr Beijing Space Informat Relay Transmiss Te Beijing Peoples R China

ISBN: (纸本)9781479959709

raptor code is a kind of new fountain code which usually adopts belief propagation(BP) decoding algorithm. In order to improve the decoding success probability of raptor code, this paper proposes two methods. On the one hand, we adopt a new construction method of check matrix for LDPC code, which can effectively avoid the girth of 4. On the other hand, we analyze and simulate the number of stopping set after BP decoding and propose a new decoding algorithm-the cascaded iterative algorithm based on the Ripple detection. Comparing our algorithm with BP, simulation results show that the proportion of encoded packages with degree 2, 3 in stopping set has decreased apparently and the success probability of raptor decoding has improved.

关键词： raptor code stopping set BP decoding Ripple

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Modified raptor code For Distributed Storage Systems

Modified Raptor Code For Distributed Storage Systems

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International Conference on Information Technology for Manufacturing Systems

作者： Chen Zheng Wang Xiaojing Univ Elect Sci & Technol China Chengdu 610054 Peoples R China Chinese Acad Sci Chengdu Inst Comp Appl Chengdu Peoples R China

ISBN: (纸本)9780878492879

We provide a prototype system for a distributed storage model, the goal of this system is to store information in a p2p network of n nodes, and the original information could be recovered later in a computationally simple way from (1+e)k of nodes for some small e>0. For solving this problem, we employ a class of B-J codes with dimension 2 as base code and obtain a new class of LDPC code by using q-tuples to substitute the elements of GF(q), to modify and improve raptor code. The improved raptor code has many advantages such as high decoding rate, flexibility in choices of the code length and rate of. As the benefits of the above characters, the storage system based on modified raptor code has great improvement in decoding probability and parameter flexibility, and a simulation is also illustrated to prove our assumption.

关键词： Distributed storage raptor code Precoding method P2P Systems

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