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Low voltage power carrier transmission algorithm

A low-voltage power carrier and transmission algorithm technology, applied in the field of communications, can solve the problems of signal spectrum utilization, low system capacity, signal multipath effect interference, etc.

Inactive Publication Date: 2015-04-29
张学毅
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The purpose of the embodiments of the present invention is to provide a low-voltage power carrier transmission algorithm, which aims to solve the problems that the signal multipath effect will cause interference, the signal spectrum utilization rate and the system capacity are low in common power line carrier transmission devices.

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Embodiment Construction

[0021] In order to make the object, technical solution and advantages of the present invention more clear, the present invention will be further described in detail below in conjunction with the examples. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0022] The application principle of the present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0023] The channel estimation algorithm of OFDM technology can be divided into the following types. According to the estimation criteria, it can be divided into least square estimation (LS) and minimum mean square error estimation (MMSE); according to whether to insert pilots, it can be divided into blind channel. Estimation and pilot-assisted channel estimation; blind or semi-blind channel estimation algorithms use character or statistical properties of transmit...

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Abstract

The invention discloses a lower voltage power carrier transmission algorithm. The low voltage power carrier transmission algorithm distributes bits according to power line carrier communication sub channels, and on the premise of keeping a target error bit rate, the spectrum efficiency of a system achieves the best; the algorithm firstly enables the performance of the system to achieve a best threshold, then, determines the modulation mode of each sub carrier, and finally, adjusts the power of the sub carriers.

Description

technical field [0001] The invention belongs to the communication field, in particular to a low-voltage power carrier transmission algorithm. Background technique [0002] Due to the large number of low-voltage power line carrier communication users, multiple users cannot share the same sub-carrier, and the number of users at the low-voltage end of the smart distribution network is large, and the number of sub-carriers sent to users by the system will increase, which will inevitably increase the communication burden, resulting in communication The quality is reduced, resulting in waste of resources. This is contrary to the concept of smart grid development. At the transmission end of the power carrier, the serial data output from multiple users enters the subcarrier and bit allocation module, which allocates different user data to different subcarriers. Therefore, multi-user subcarrier and bit allocation is quite complicated. The traditional greedy algorithm is a single-us...

Claims

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Application Information

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IPC IPC(8): H04B3/54
Inventor 张学毅
Owner 张学毅
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