40,879 Hits in 3.7 sec

Spread codes and spread decoding in network coding

Felice Manganiello, Elisa Gorla, Joachim Rosenthal
2008 2008 IEEE International Symposium on Information Theory  
In this paper we introduce the class of Spread Codes for the use in random network coding. Spread Codes are based on the construction of spreads in finite projective geometry.  ...  The major contribution of the paper is an efficient decoding algorithm of spread codes up to half the minimum distance.  ...  INTRODUCTION In [KK07] Kötter and Kschischang develop a novel framework for random network coding.  ... 
doi:10.1109/isit.2008.4595113 dblp:conf/isit/ManganielloGR08 fatcat:vvlgb5dtn5gavfehdaeuwfmfrq

A dynamic CDMA network for multicore systems

Basel Halak, Teng Ma, Ximeng Wei
2014 Microelectronics Journal  
CDMA (code-division multiple-access) is a data transmission method based on the spreading code technology, where in multiple data streams share the same physical medium with no interference.  ...  Data transmission latency is reduced by adopting a parallel structure for the coding/decoding circuitry.  ...  /decoding circuitry as explained in sections IV and V.  ... 
doi:10.1016/j.mejo.2014.02.002 fatcat:xfhioquhujbctgcqlj42quadoe

High Performance Advanced P-OCI Crossbar with PaCC Codec

Ashly Thomas
2018 International Journal for Research in Applied Science and Engineering Technology  
In this paper, a hybrid encoder used in the crossbar can develop both the orthogonal and nonorthogonal spreading. The orthogonal and overloaded decoders are used to decode the data.  ...  The Walsh spreading codes enables adding more number of non orthogonal spreading codes to increase the interconnect capacity.  ...  Fig 10.c and Fig.10 .d shows the PaCC decoder section and decoder section of the P-OCI crossbar and .The crossbar architectures are evaluated for spreading code length C=8 and is shown in Table. 1.  ... 
doi:10.22214/ijraset.2018.5056 fatcat:na43nfdcfjef3jgfdvh6uqz7me

Partial Spreads in Random Network Coding [article]

Elisa Gorla, Alberto Ravagnani
2013 arXiv   pre-print
In particular, following an idea in finite projective geometry, we introduce a class of network codes which we call "partial spread codes". Partial spread codes naturally generalize spread codes.  ...  In this paper we provide an easy description of such codes in terms of matrices, discuss their maximality, and provide an efficient decoding algorithm.  ...  ACKNOWLEDGMENT The authors would like to thank Leo Storme for useful discussions on partial spreads in finite projective geometry.  ... 
arXiv:1306.5609v1 fatcat:vx7sw5plj5hwbhke7ihwd57h3i

Symbol Erasure Correction Capability of Spread Codes [article]

Heide Gluesing-Luerssen, Anna-Lena Horlemann-Trautmann
2017 arXiv   pre-print
Furthermore, we explain how to decode these codes in the two channel models and compare their decoding complexities.  ...  For both models we derive the symbol erasure correction capabilities of spread codes and compare them to other known codes suitable for those models.  ...  Introduction Network coding in general, and random (or non-coherent) network coding in particular, has received much attention in the last decade.  ... 
arXiv:1710.06323v1 fatcat:bk32vctpdrfk7n3phcki7x2u4q


V. Ravichandran
2012 IOSR Journal of Engineering  
The simulation of the system using VHDL code is carried out. The performance of the system and is evaluated.  ...  NoC(network On Chip) is an efficient approach to design the communication subsystem between IP Cores in SoC (System On Chip).  ...  The proposed decoding scheme requires the spreading codes used in the CDMA NoC to have both the orthogonal and balance properties.  ... 
doi:10.9790/3021-02918490 fatcat:thhvkfbzb5f53ldfjwpyrwbmm4

Incorporating Random Linear Network Coding for Peer-to-Peer Network Diagnosis

Elias Kehdi, Baochun Li
2010 2010 Proceedings IEEE INFOCOM  
We use progressive random linear network coding to disseminate the snapshots in the network, from which the server pulls data in a delayed fashion.  ...  In this paper, we demonstrate how random linear network coding can be incorporated to provide network diagnosis for peer-to-peer systems.  ...  Figure 2 shows the number of decoded blocks in function of the spreading factor in a network consisting of 1000 peers. We fix β to 0.25 and vary the parameter α(d) of the spreading factor SF .  ... 
doi:10.1109/infcom.2010.5461941 dblp:conf/infocom/KehdiL10 fatcat:5c7pr6wnibemhhakrgbgmieufi

High performance 70 Gbit∕s SPECTS optical-CDMA network testbed

W. Cong, R.P. Scott, V.J. Hernandez, K. Li, J.P. Heritage, B.H. Kolner, S.J.B. Yoo
2004 Electronics Letters  
Error-free operation of an optical code division multiple access (O-CDMA) network testbed with seven simultaneous users at 10 Gbit=s=user distributed in two time slots is demonstrated.  ...  The O-CDMA network testbed overcomes the key challenge of multi-user interference by adopting a highly nonlinear fibre-based thresholder and by careful system engineering.  ...  Acknowledgments: This work was supported in part by DARPA and SPAWAR under agreement number N66001-02-1-8937 and by the AFOSR through the UC Davis Center for Digital Security.  ... 
doi:10.1049/el:20046451 fatcat:pz75qvuw35a5rc2e22nylaxqsa

Encoding and decoding of femtosecond pulses

A. M. Weiner, J. P. Heritage, J. A. Salehi
1988 Optics Letters  
We propose that frequency-domain encoding and decoding of coherent ultrashort pulses could form the basis for a rapidly reconfigurable, code-division multiple-access optical telecommunications network.  ...  Spreading is accomplished by encoding pseudorandom binary phase codes onto the optical frequency spectrum. Subsequent decoding of the spectral phases restores the original pulse.  ...  Martinez and C. A. Brackett, and the technical assistance of D. E. Leaird.  ... 
doi:10.1364/ol.13.000300 pmid:19745879 fatcat:wb4it3dydrdobipwaqrfwdsg4a

Parallel overloaded CDMA crossbar for network on chip

Ashok Kumar, P. Dananjayan
2019 Facta universitatis - series Electronics and Energetics  
In this paper, OCDMA crossbar is modified and advanced with parallel encoding and decoding operation using orthogonal gold codes for improving the speed of crossbar thereby obtaining high performance in  ...  The CDMA system uses Walsh based spreading code which improves the bandwidth efficiency. On the contrary, it is not effective when the number of nodes present in the system increases.  ...  PN sequence, gold code and Kasami code are the few non-orthogonal spreading codes in use. These codes are used in encoding and decoding of original data and protecting from interference in CDMA.  ... 
doi:10.2298/fuee1901105k fatcat:s467oqg4j5eu3psnirbvmaqrbu

Analog network coding for multi-user spread-spectrum communication systems

Georges Kaddoum, Pascal Giard
2014 2014 IEEE Wireless Communications and Networking Conference (WCNC)  
This work presents another look at an analog network coding scheme for multi-user spread-spectrum communication systems.  ...  To this end, each pair of users, A and B, that communicate with each other via a relay R shares the same spreading code.  ...  In this case, the arithmetic sum is considered a form of network coding. In conventional multiuser spread-spectrum systems each user has its own spreading code.  ... 
doi:10.1109/wcnc.2014.6952033 dblp:conf/wcnc/KaddoumG14 fatcat:ooqpwpkjnbgp7ae6opb7uuftlq

Applying CDMA Technique to Network-on-Chip

Xin Wang, Tapani Ahonen, Jari Nurmi
2007 IEEE Transactions on Very Large Scale Integration (vlsi) Systems  
The issues of applying the code-division multiple access (CDMA) technique to an on-chip packet switched communication network are discussed in this paper.  ...  A six-node GALS CDMA on-chip network is modeled and simulated.  ...  Spreading Code Selection As discussed in Section II-A, the proposed decoding scheme requires the spreading codes used in the CDMA NoC to have both the orthogonal and balance properties.  ... 
doi:10.1109/tvlsi.2007.903914 fatcat:qxl3ex2ebjczzmi26vroszrn54

A New Code Family for Double Spread Transmissions in Radio-over-Fiber over Optical CDMA Network

Kai-Sheng Chen, Chao-Chin Yang, Jen-Fa Huang, Hsuan-Ho Chang
2016 Journal of Communication and Computer  
The architecture of double spreading fiber-radio network is presented in details where the direct-sequence CDMA (DS-CDMA) modulation signals in RF (radio frequency) domain are cascaded to the spectrum-coded  ...  Cumulative effects of MAI (multiple access interference), thermal and PIIN (phase-induced intensity noise) are taking into account in our analysis.  ...  Performance of RMSSP code and Hadamard code are also compared. Construction of RMMSP Code To achieve double spread CDMA network, the modified SSP (stuffed shift prime) code in Ref.  ... 
doi:10.17265/1548-7709/2016.07.005 fatcat:to7rhwdj6vgrzabs3wvtity4cy

Spread Decoding in Extension Fields [article]

Felice Manganiello, Anna-Lena Trautmann
2012 arXiv   pre-print
In this work we present a new representation of spread codes with a minimum distance decoding algorithm which is efficient when the codewords, the received space and the error space have small dimension  ...  A spread code is a set of vector spaces of a fixed dimension over a finite field Fq with certain properties used for random network coding.  ...  Acknowledgement The authors thank Wolfgang Willems for the useful discussion during his visit and Joachim Rosenthal for the comments on the final version of this work.  ... 
arXiv:1108.5881v2 fatcat:utoisnsbtzafja2h2ovbubndt4

Novel packet coding scheme immune to packet collisions for CDMA-based wireless ad hoc networks

D. Liu, Y. Cai, G. Tu
2006 IEE Proceedings - Communications  
A novel packet coding scheme for DS-CDMA ad hoc networks is developed.  ...  The scheme facilitates collision resolution by embedding the information of both transmitter and receiver in the coding scheme so that the receiver can identify packets addressing to it without actually  ...  Spreading code schemes can take several different forms in CDMA wireless ad hoc networks, including network-wide code where a common code is used by all users, receiver-based code and transmitter-based  ... 
doi:10.1049/ip-com:20050072 fatcat:le2msm554ndgbjqrsrrcfka5si
« Previous Showing results 1 — 15 out of 40,879 results