CODES

作品数：387被引量：367H指数：9
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Serial Genetic Algorithm Decoder for Low Density Parity Check Codes
《International Journal of Communications, Network and System Sciences》2015年第9期358-366,共9页Hasna Chaibi 
Genetic algorithms are successfully used for decoding some classes of error correcting codes, and offer very good performances for solving large optimization problems. This article proposes a new decoder based on Seri...
关键词：SERIAL Genetic Algorithm Sum-Product DECODER Sigmoidal Function LDPC Code Error CORRECTING CODES 
On the Computing of the Minimum Distance of Linear Block Codes by Heuristic Methods
《International Journal of Communications, Network and System Sciences》2012年第11期774-784,共11页Mohamed Askali Ahmed Azouaoui Said Nouh Mostafa Belkasmi 
The evaluation of the minimum distance of linear block codes remains an open problem in coding theory, and it is not easy to determine its true value by classical methods, for this reason the problem has been solved i...
关键词：Minimum Distance Error Impulse Method Heuristic Methods Genetic Algorithms NP-HARDNESS Linear Error Correcting Codes BCH Codes QR Codes Double Circulant Codes 
Efficient Information Set Decoding Based on Genetic Algorithms
《International Journal of Communications, Network and System Sciences》2012年第7期423-429,共7页Ahmed Azouaoui Idriss Chana Mostafa Belkasmi 
In this paper, we describe a hard-decision decoding technique based on Genetic Algorithms (HDGA), which is applicable to the general case of error correcting codes where the only known structure is given by the genera...
关键词：GENETIC Algorithms (GA) ERROR CORRECTING CODES RS CODES Information Set DECODING CHASE Algorithm 
A Class of Constacyclic Codes over <i>R</i>+ <i>vR</i>and Its Gray Image
《International Journal of Communications, Network and System Sciences》2012年第4期222-227,共6页Dajian Liao Yuansheng Tang 
We study (1 + 2v)-constacyclic codes overR + vR and their Gray images, where v2 + v = 0 and R is a finite chain ring with maximal ideal λ> and nilpotency index e. It is proved that the Gray map images of a (1 + 2v)-c...
关键词：FROBENIUS Ring Constacyclic CODES GENERATOR POLYNOMIAL Dual CODES 
A Design Method of Noncoherent Unitary Space-Time Codes
《International Journal of Communications, Network and System Sciences》2011年第7期430-435,共6页Li Peng Qiuping Peng Lingling Yang 
We generalized an constructing method of noncoherent unitary space time codes (N-USTC) over Rayleigh flat fading channels. A family of N-USTCs with T symbol peroids, M transmit and N receive antennas was constructed b...
关键词：NONCOHERENT Uintary SPACE-TIME CODES (N-USTC) Coherent SPACE-TIME CODES (C-STC) GRASSMANN Manifold Degree of Freedom Exponenatial Map Full Rate and Full Diversity (FRFD) 
Application of Perfect Difference Codes in Wireless Infrared Systems
《International Journal of Communications, Network and System Sciences》2010年第8期674-678,共5页Fahim A. Umrani Salah Obayya 
In this paper, we apply the perfect difference codes in wireless infrared systems considering the diffuse indoor optical wireless configuration. The bit error rate performance of the uplink wireless infrared system us...
关键词：OCDMA COMPACT ENCODER/DECODER PERFECT DIFFERENCE CODES 
On Cross-Layer Design of AMC Based on Rate Compatible Punctured Turbo Codes
《International Journal of Communications, Network and System Sciences》2010年第3期256-265,共10页Fotis Foukalas Evangelos Zervas 
This paper extends the work on cross-layer design which combines adaptive modulation and coding at the physical layer and hybrid automatic repeat request protocol at the data link layer. By contrast with previous work...
关键词：CROSS-LAYER Design Adaptive Modulation and Coding RATE-COMPATIBLE Punctured Turbo CODES Hybrid ARQ CODES Complexity 
Performance of Block Space-Time Code in Wireless Channel Dynamics
《International Journal of Communications, Network and System Sciences》2009年第6期461-468,共8页Won Mee JANG Jong Hak JUNG 
In this work, we observe the behavior of block space-time code in wireless channel dynamics. The block space-time code is optimally constructed in slow fading. The block code in quasistatic fading channels provides af...
关键词：SPACE-TIME CODES DIVERSITY Multiple Transmit ANTENNAS Self-Encoded SPREAD SPECTRUM 
Beam Pattern Scanning (BPS) versus Space-Time Block Coding (STBC) and Space-Time Trellis Coding (STTC)
《International Journal of Communications, Network and System Sciences》2009年第6期469-479,共11页Peh Keong TEH Seyed ZEKAVAT 
In this paper, Beam Pattern Scanning (BPS), a transmit diversity technique, is compared with two well known transmit diversity techniques, space-time block coding (STBC) and space-time trellis coding (STTC). In BPS (a...
关键词：Antenna Array Beam Pattern SWEEPING Transmit Diversity SPACE-TIME Block CODES and SPACE-TIME TRELLIS Coding 
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