Quality estimation of data transmission is a high priority goal of data transmission systems research. Estimation from the side of used error-correcting schemes efficiency can be one of the solutions. In this paper we...
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ISBN:
(纸本)9781424465880
Quality estimation of data transmission is a high priority goal of data transmission systems research. Estimation from the side of used error-correcting schemes efficiency can be one of the solutions. In this paper we would like to show the results of the comparison of error-correcting schemes in T-DMB and DAB protocols in conditions of data transmission between moving subscribers. These results are represented as a graph of dependence probability of error from Signal-to-Noise ratio and show the gain when using T-DMB for transmission of multimedia services in mobile channels. We show that using T-DMB for data transmission in the mobile channel can provide high quality transmission. NCTUns implementation model was used during this work.
This article investigates new strategies to compute accurate low-complexity log-likelihood ratio (LLR) values based on the Bayesian formulation under uncorrelated fading channels for both antipodal and code shift keyi...
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This article investigates new strategies to compute accurate low-complexity log-likelihood ratio (LLR) values based on the Bayesian formulation under uncorrelated fading channels for both antipodal and code shift keying modulations when no channel state information (CSI) is available at the receiver. These LLR values are then used as input to modern error-correcting schemes used in the data decoding process of last-generation Global Navigation Satellite System signals. Theoretical analysis based on the maximum achievable rate is presented for the different methods in order to evaluate the performance degradation with respect to the optimal CSI channel. Finally, the frame error rate simulation results are shown, validating the appropriate performance of the proposed LLR approximation methods.
In recent years,power line communication technology has seen a rapid ***,due to the unsteadiness of the power line channels,the communication attenuation and bit error rate is still a big *** on the previous research ...
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ISBN:
(纸本)9781538629185
In recent years,power line communication technology has seen a rapid ***,due to the unsteadiness of the power line channels,the communication attenuation and bit error rate is still a big *** on the previous research of spread spectrum communication and orthogonal frequency division multiplexing（OFDM）,in this paper,we studies the method to eliminate attenuation using OFDM in low voltage power line communication,and gives the system model based on transmission *** also studies the way to improve the accuracy of signal transmission and reduce the bit error rate by changing the guard interval and error-correcting *** the same time,the result of test and simulation is *** alternative scheme provides a significant performance in anti-interference ability and considerable computational complexity reduction compared to the usual scheme.
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