|
|
|
| Stochastic Resonance of TCM Coding and Decoding in Threshold Array Systems |
| LI Heng, WANG Youguo, ZHAI Qiqing
|
| College of Communication and Information Engineering, Nanjing University of Posts and Telecommunications, Nanjing Jiangsu 210003, China |
|
|
|
|
Abstract In order to further reduce the bit error rate (BER) of the trellis coded modulation (TCM) signal at the receiving end, the decoding performance of the TCM code is improved, A discrete multi-threshold array system combined with a Viterbi decoder is used. The mutual information between the output signal of the threshold array system and the TCM coded signal is deduced through theory. At the same time, the variation of the BER is analyzed through simulation experiments. The changes under two different measures are compared. Theoretical analysis shows that under proper noise conditions, the signal is transmitted losslessly to the decoding end; Simulation experiments also show that BER will be greatly reduced under the appropriate number of noise intensity threshold array elements and noise intensity. Comparing the stochastic resonance (SR) under two measures, we found that the existence of stochastic resonance is related to the measurement. Theoretical analysis and simulation experiments show that proper noise in this system can significantly improve mutual information and reduce BER.As the number of threshold cells increases, this effect becomes more pronounced.
|
|
Received: 27 November 2017
Published: 10 January 2019
|
|
|
|
|
|
|
|
|
