High-speed decoding technique for slip detection in data transmission systems using modified cyclic block codes

Block Data Transmission Systems (BDTS) are used in high speed wireless communication systems with time dispersive channel characteristics. Since Maximum Likelihood Block Detection (MLBD) requires huge amount of computation, Sphere Detection (SD) technique has been introduced as an alternative. This paper proposes an An Lattice Sphere Detection (AnLSD) technique for detection in block data transmission systems (BDTS). The An lattice structure offers more dense constellation points than the customary Zn lattice in SD technique. Thus, the proposed AnLSD uses An lattice generator matrix as the channel matrix, and uses the Gram matrix which is obtained from the generator matrix as part of the detection process. Simulation results show that the proposed AnLSD performs very close to the Exhaustive search (ES) using block size of 20 bits. It is also performing better than the other renowned methods tested under a channel with spectral nulls. The proposed AnLSD technique offers significant reduction in term of objective functions evaluation as compared to the other renowned methods.

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Projective-Plane Iteratively Decodable Block Codes for WDM High-Speed Long-Haul Transmission Systems

Journal of Lightwave Technology ◽

10.1109/jlt.2004.825768 ◽

2004 ◽

Vol 22 (3) ◽

pp. 695-702 ◽

Cited By ~ 45

Author(s):

I.B. Djordjevic ◽

S. Sankaranarayanan ◽

B.V. Vasic

Keyword(s):

Projective Plane ◽

High Speed ◽

Block Codes ◽

Transmission Systems

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SPREAD SPECTRUM TECHNOLOGY RESEARCH AND ITS APPLICATION IN POWER LINE COMMUNICATION SYSTEMS

T-Comm ◽

10.36724/2072-8735-2020-14-10-45-52 ◽

2020 ◽

Vol 14 (10) ◽

pp. 45-52

Author(s):

Edgar M. Dmitriyev ◽

◽

Eugeny V. Rogozhnikov ◽

Andrey K. Movchan ◽

Semyon M. Mukhamadiev ◽

...

Keyword(s):

Data Transmission ◽

Spread Spectrum ◽

Communication Systems ◽

High Speed ◽

Transmission Rate ◽

Power Lines ◽

Transmission Systems ◽

Data Transmission Rate ◽

High Data ◽

Speed Data Transmission

In the presented article, the results of the research of the spreading spectrum technology are given and its use in communication systems based on the data transmission over power lines is considered. One of the currently existing problems of data transmission systems over power lines is the absence of a compromise solution in ensuring the required data transmission rate and communication range. Ready-made solutions existing on the market provide either high data transmission rates over short distances or a communication long-range with rates not exceeding several tens of kilobits per second. The purpose of the article is to research the application of spread spectrum technology in data transmission systems over power lines. In the course of the experiment, it was found that the joint use of OFDM technology and the spread spectrum technology makes it possible to form a solution that provides communication over power lines over a distance of tens of meters with a data transmission rate of at least 5 Mbps. This article compares the TP-Link 500 Mbps modem for broadband high-speed data transmission, and the NWEPLC-1-G3M modem for narrowband low-speed data transmission. The results of modeling a communication system with different lengths and types of spreading sequences for BPSK and QPSK modulations are presented. An assessment of the interference protection was carried out. The results of an experimental research of the spectrum spreading technology on a model of a data transmission system over power lines in terms of range and transmission rate in comparison with existing devices on the market are presented. The results obtained can be used in the design of communication systems over power lines.

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