| To nowadays, The Power Line Communication (PLC) has achieved significant achievements, showing great advantages in many areas. But it is also facing serious problems to be solved, of which the terrible channel feature, especially the noise situation is the most serious ones.The noise characteristics in power line is complicated and varies in different place. So, studies of this is necessary:it makes people understand noise feature in a specific area. Grasping of the main characteristics and parameters of specific types of noise can help people to take right measures in communications. Besides, through noise modeling and simulation work, we can find ways to simulate the real environment, which plays a supporting role to other PLC research.In order to get power line noise model quickly and accurately, In this paper, noise has been acquired and noise characteristics has been analyzed firstly in Low voltage power line communication channel,and combining with the characteristic analysis select the appropriate model to simulate the low voltage power line noise.Secondly,for Impulse noise model it put forward a kind of impulse noise model based on amplitude and width of the low-voltage power line channel impulse noise detection method to identify the impulse noise and model parameters;for background noise mode it put forward a kind of power spectral convergence algorithm to solve and determine Optimization parameters in background noise mode.Finally,Noise of the model that is obtained by the two methods proposed in this paper is simulated by matlab,and the noise model and the measured data compare in communication features by OFDM communication technology.The simulation is results that noise model is established by two algorithms in this paper can more rapidly and accurate response characteristics of the noise and waveform in power line environment, and have very important significance in the future of development of low voltage power line communication... |
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