Adaptive cancelling method and system for narrow band noise in multiple-input multiple-output power line communication
A technology of power line communication and narrow-band noise, which is applied in distribution line transmission system, multi-frequency code system, wired transmission system, etc.
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[0057] Example: such as figure 1 and figure 2 Shown; A kind of self-adaptive elimination method of narrowband noise of multi-input multi-out power line communication, it includes:
[0058] S1: Obtain the statistical characteristics of the channel model parameters by measuring narrowband noise data;
[0059] S2: Establish a MIMO-PLC channel model according to the statistical characteristics in step S1;
[0060] S3: According to the model in step S2, the narrowband noise is eliminated in the time domain by using an adaptive elimination algorithm.
[0061] The sending end sequentially performs convolutional coding, scrambling, interleaving and OFDM modulation on the signal. After modulation at the sending end, the signal enters the power line channel, and this system uses 3×3 MIMO-PLC channel.
[0062] It includes three input terminals, namely:
[0063] a first input terminal L-N, a second input terminal N-PE and a third input terminal PE-L; and
[0064] The three output p...
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