We consider a decoding method for cyclic codes up to the Hartmann-Tzeng bound using the discrete Fourier transform. Indeed we propose how to make a submatrix or the circulant matrix from an error vector for this decod...
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ISBN:
(纸本)9781424413737
We consider a decoding method for cyclic codes up to the Hartmann-Tzeng bound using the discrete Fourier transform. Indeed we propose how to make a submatrix or the circulant matrix from an error vector for this decoding method. Moreover an example of a binary cyclic code, which could not be corrected by BCH decoding but be correctable by proposed decoding, is given. It is expected that this decoding method induces universal understanding for decoding method up to the Roos bound and the shift bound.
KEELOQ code hopping technology is a nonlinear anti-encryption algorithm designed for secure Remote Keyless Entry (RKE) systems. It combines a 66-bits transmission length, so as to prevent the system from code predicti...
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ISBN:
(纸本)9780769538167
KEELOQ code hopping technology is a nonlinear anti-encryption algorithm designed for secure Remote Keyless Entry (RKE) systems. It combines a 66-bits transmission length, so as to prevent the system from code predicting, code grabbing and code scanning. Because of its feature of high-security, it effectively overcomes the disadvantages of the traditional fixed code technology. This paper researched on KEELOQ encryption algorithm and presented a designed RKE system based on KEELOQ technology. When the software and hardware were designed, the whole RKE system was afterwards made as a prototype for the functionality tests. The experimental results showed that the design achieved the anticipative effects.
The major errors that occur in a communication channel are the random error and the burst error. The codes considered in the past are mostly to correct one of those errors. The errors that occur in an actual channel, ...
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The letter gives general descriptions of II-GHARQ and defines a concept of minimum distance distributed sequence (DDS) which is more exact to represent the error-correcting capability of the codes used in II-GHARQ. So...
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The letter gives general descriptions of II-GHARQ and defines a concept of minimum distance distributed sequence (DDS) which is more exact to represent the error-correcting capability of the codes used in II-GHARQ. Some DC codes which have a better DDS than KM codes are designed and Hadamard transform decoding is regarded as a common decoding method. Both analysis and simulation results indicate that II-HARQ using DC code gives a good throughput efficiency.
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