Frequency-Hopping Communication Technology Based on Self-Adaptive MIMO-OFDM System

2014 ◽  
Vol 945-949 ◽  
pp. 2230-2236
Author(s):  
Jin Xin Ruan ◽  
Yan Xu ◽  
Miao Cui
Keyword(s):  
Communication Technology ◽  
Data Transmission ◽  
Transmission Rate ◽  
Frequency Hopping ◽  
Ofdm System ◽  
Time Data ◽  
Electronic Warfare ◽  
Data Transmission Rate ◽  
Mimo Ofdm ◽  
Self Adaptive

Along with the gradual increase of intelligent and information equipment on the battlefield, the fierce electronic warfare between the enemy and us makes the electromagnetic environment of the battlefield more and more severe. The anti-jamming capability of conventional frequency-hopping communication system is inadequate such as anti-dynamic interference, anti-intercept, etc., thus posing a serious threat to normal military communication. Moreover, currently the data transmission rate of frequency-hopping system is fairly lower, and cannot meet the increasing large-capacity real-time data transmission requirements. This article deeply researches self-adaptive MIMO-OFDM technology and frequency-hopping communication technology, and introduces the research on frequency-hopping communication technology based on self-adaptive MIMO-OFDM system. The research shows that self-adaptive MIMO-OFDM-based technology can effectively enhance the frequency-hopping communication system’s anti-jamming and anti-intercepting capability, and improve the data transmission rate.

Intelligent Heat Meter of Monitoring and Controlling System for Heating Supply Based on GPRS Network

2012 ◽  
Vol 614-615 ◽  
pp. 695-700 ◽  
Author(s):  
Xing Zhe Piao ◽  
Yu Shan Xue ◽  
Cheng Gao ◽  
Ying Shun Li
Keyword(s):  
Real Time ◽  
Data Transmission ◽  
Data Exchange ◽  
Transmission Rate ◽  
Measuring Instruments ◽  
Heat Meter ◽  
Time Data ◽  
Data Transmission Rate ◽  
Lc Oscillator ◽  
And Control

In order to realize long-range real-time online monitor and control of the measured data on the spot, and bring about control consumption of heat-energy according to need, a heat meter is developed for heating supply based on GPRS network technology. Low-power single-chip microcomputer MSP430FW427 is adopted as the measuring instruments in which SIEMENS MC55 module was used as a GPRS communication and LC oscillator coupling technology as flow sensor. In addition, the measurement principle of the heat quantity, the design methods of the software and hardware for heat meter are explained in detail, and the mathematical models of temperature and liquid sensor are established in the paper. Application of GPRS communication technology provides a transparent data transmission channel, thus realizing real-time data exchange between fared knots and monitoring center. On-the-spot operations prove that when the system is in real operation, data transmission rate is about 61.8kbps, thus having more advantages of security，accuracy and data transmission rate, effectively solving the problem of a large number of investment on traditional remote monitoring and control system.

Meta-Heuristic MOALO Algorithm for Energy-Aware Clustering in the Internet of Things

2021 ◽  
Vol 12 (2) ◽  
pp. 74-93
Author(s):  
Ravi Kumar Poluru ◽  
R. Lokeshkumar
Keyword(s):  
Energy Consumption ◽  
Data Transmission ◽  
Transmission Rate ◽  
Fitness Function ◽  
Shortest Paths ◽  
Cluster Head ◽  
Energy Aware ◽  
Energy Efficient Routing ◽  
Multi Objective ◽  
Data Transmission Rate

Boosting data transmission rate in IoT with minimized energy is the research issue under consideration in recent days. The main motive of this paper is to transmit the data in the shortest paths to decrease energy consumption and increase throughput in the IoT network. Thus, in this paper, the authors consider delay, traffic rate, and density in designing a multi-objective energy-efficient routing protocol to reduce energy consumption via the shortest paths. First, the authors propose a cluster head picking approach that elects optimal CH. It increases the effective usage of nodes energy and eventually results in prolonged network lifetime with enhanced throughput. The data transmission rate is posed as a fitness function in the multi-objective ant lion optimizer algorithm (MOALOA). The performance of the proposed algorithm is investigated using MATLAB and achieved high convergence, extended lifetime, as well as throughput when compared to representative approaches like E-LEACH, mACO, MFO-ALO, and ALOC.

Adaptive Bit Allocation Algorithm for OFDM System

2014 ◽  
Vol 989-994 ◽  
pp. 2161-2164
Author(s):  
Wei Wei ◽  
Wen Dong An
Keyword(s):  
Greedy Algorithm ◽  
Bit Error Rate ◽  
Data Transmission ◽  
Transmission Rate ◽  
Bit Allocation ◽  
Total Power ◽  
Ofdm System ◽  
Allocation Algorithm ◽  
The Greedy Algorithm ◽  
Number Of Iterations

For the greedy algorithm required a large number of iterations, this paper proposed one adaptive bit allocation algorithm based on Hughes-Hartogs algorithm which was improved greedy algorithm .Under the constraint of bit error rate and data transmission rate, the algorithm first used the Chow algorithm to allocate some of the bits, and then used the greedy algorithm to allocate the remaining bits. When minimize the total power by this algorithm, the iterations of this algorithm were significantly less than the greedy algorithm. By computer simulation, the results showed that performance of this algorithm was very close to the greedy algorithm, and the number of this algorithm’s iterations was 7.4%~34% of the greedy algorithm.

Design and Implement of the Wireless Real-Time Data Transmission System Based on USB

2013 ◽  
Vol 310 ◽  
pp. 596-600 ◽  
Author(s):  
Xiao Guang Li
Keyword(s):  
Real Time ◽  
Error Rate ◽  
Data Transmission ◽  
Transmission Rate ◽  
Transmission System ◽  
Time Data ◽  
Real Time Data ◽  
Data Transmission System ◽  
Data Error ◽  
Wireless Module

In order to overcome the disadvantages of small broadband, low transmission rate, network delay and high error rate in the locomotive real-time data transmission. A new wireless real-time data transmission system is designed by using nRF24L01 based on USB2.0.Which includes CY7C68013A chip of CYPRESS company and nRF24L01 wireless module, gives communication principle interface electrics circuit between CY7C68013A chip and nRF24L01 wireless module, focus on the hardware and software designs according to practical application and analyze real-time of the data during transporting. An algorithm for reducing real-time data error rate is developed to achieve efficient real-time data transmission. Experiments proved that the system is easy to control and works stably to perform reliable wireless real-time data transmission.

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

T-Comm ◽  
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.

scholarly journals Adaptive Coding in Control of Two Satellites Relative Motion Over the Packet Erasure Communication Channel

2020 ◽  
Author(s):  
Boris Andrievsky ◽  
Alexander Fradkov ◽  
Elena Kudryashova
Keyword(s):  
Data Transmission ◽  
Data Exchange ◽  
Communication Channel ◽  
Transmission Rate ◽  
Control Law ◽  
Data Transmission Rate ◽  
High Data ◽  
Navigation Data ◽  
Binary Coding

The paper is focused on the navigation data exchange between two satellites moved in a swarm. The feedback control law is designed ensuring regulation of the relative satellites motion. The adaptive binary coding/decoding procedure for data transmission over the limited capacity communication channel is proposed and studied for the cases of ideal and erasure channel. Dependence of the regulation time on the data transmission rate is numerically found. The results obtained provides dependence of the required load of the communication channel on the desired quality of the stabilization process. It is demonstrated that for significantly high data transmission rate erasure of data in the channel with probability up to 0.3 does not make an effect on the regulation time.

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