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.

Inactive Publication Date: 2018-10-12
STATE GRID CHONGQING ELECTRIC POWER CO ELECTRIC POWER RES INST +2
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Problems solved by technology

[0004] Most of the above methods use the frequency domain method, and there is no comm...

Method used

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  • Adaptive cancelling method and system for narrow band noise in multiple-input multiple-output power line communication
  • Adaptive cancelling method and system for narrow band noise in multiple-input multiple-output power line communication
  • Adaptive cancelling method and system for narrow band noise in multiple-input multiple-output power line communication

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Embodiment

[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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Abstract

The invention discloses an adaptive cancelling method and system for a narrow band noise in multiple-input multiple-output power line communication, comprising the following steps: S1, obtaining statistic characteristics of channel model parameters by measuring narrow band noise data; S2, according to the statistic characteristics in the step S1, building an MIMO-PLC channel model; and S3, according to the model in the step S2, cancelling the narrow band noise in the time domain by adopting an adaptive cancelling algorithm. The method disclosed by the invention has the beneficial effects thatsignals related to the narrow band noise can be obtained by analyzing time domain characteristics of the narrow band noise, the adaptive cancelling algorithm is adopted, and then canceling can be carried out through adaptive interference cancellation, so that the narrow band noise can be cancelled in the time domain.

Description

technical field [0001] The invention relates to the technical field of power line communication, in particular to an adaptive elimination method and system for narrowband noise of multi-input multi-output power line communication. Background technique [0002] Power line communication (Power Line Communication, PLC) technology makes full use of the extensive line resources of the power system, and develops very rapidly. It has huge application scenarios in smart grid, smart city, home automation, etc. With the rapid development of power lines, people put forward higher requirements for power line communication. [0003] Due to the wireless signals in short-wave and medium-wave broadcasting, the narrow-band noise caused by crosstalk in the power line channel will affect the synchronization, channel estimation and demodulation of the PLC system, thereby increasing the bit error rate (BER) of the PLC system. Eliminating narrow-band noise is of great help to the accurate trans...

Claims

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Application Information

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IPC IPC(8): H04B3/54H04B7/0413H04L27/26H04B1/10
CPCH04B1/1036H04B3/542H04B7/0413H04L27/2691
Inventor 李松浓侯兴哲刘晓郑可叶君程小明徐国庆孙洪亮曾妍谢广成刘型志陈文礼杨芾藜宫林胡晓锐籍勇亮
Owner STATE GRID CHONGQING ELECTRIC POWER CO ELECTRIC POWER RES INST
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