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OFDM (orthogonal frequency division multiplexing) modulation based frame synchronization signal generation method for power-line carrier communication system

A technology of frame synchronization signal and power line carrier, applied in the field of digital information transmission

Active Publication Date: 2015-09-30
深圳市力合微电子股份有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0009] The technical problem to be solved by the present invention is: in order to cope with the challenges of multipath fading, background noise and pulse noise in the power line environment, and to make up for the above-mentioned deficiencies in the prior art, a power line carrier communication system frame synchronization signal based on OFDM modulation is proposed The generation method, the frame synchronization signal generated by it can make the transmitting end and the receiving end accurately synchronized, have strong noise resistance and can adapt to the requirements of multi-function, multi-service or multi-mode

Method used

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  • OFDM (orthogonal frequency division multiplexing) modulation based frame synchronization signal generation method for power-line carrier communication system

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Embodiment Construction

[0053]In order to make the object, technical solution and advantages of the present invention clearer, the implementation manner of the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0054] In the specific embodiment part, the present invention provides a kind of figure 1 The frame synchronization signal generating method shown is used for generating a frame synchronization signal of an OFDM power line carrier communication system.

[0055] The system parameters used in this implementation case are defined in the following table:

[0056] Table 1 OFDM narrowband power line carrier communication system parameters

[0057] indicators

value

Working frequency(kHz)

250

IFFT points N

512

Working frequency band (kHz)

39.0625～89.3555

Subcarrier spacing Δf

488.28125Hz

[0058] At the same time, this system needs to distinguish between the indoor network and th...

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Abstract

The invention relates to an OFDM (orthogonal frequency division multiplexing) modulation based frame synchronization signal generation method for a power-line carrier communication system. The method includes the steps: according to system design requirements, determining an amount M of modes, services or functions needed to be supported by the system; according to the amount M, introducing M groups of short binary PNS sequences with excellent cross-correlation performances; according to OFDM characteristic parameters of the system, introducing a group of long binary PNL sequences, and generating OFDM basic signals on the basis of the long binary PNL sequences; adopting the short sequences for modulation of the OFDM basic signals to generate frame synchronization signals. The frame synchronization signals generated according to the method not only provide an accurate timing synchronization function but bear certain physical-layer information to provide simple, convenient and reliable detection means for a receiving end so as to meet multifunctional, multi-mode or multi-service requirements under complicated and severe power line channel environments.

Description

technical field [0001] The invention relates to the technical field of digital information transmission, in particular to a method for generating a frame synchronization signal of a power line carrier communication system based on OFDM modulation. Background technique [0002] Power line carrier communication technology, referred to as PLC, refers to a communication method that uses power lines to transmit data. It can make full use of the existing power distribution network infrastructure and provide users with data communication services without any wiring. Using the existing power line to realize data communication can greatly save the construction cost of the communication network. [0003] However, due to the influence of many factors, the development of power line carrier communication technology is restricted. The main thing is the complex channels on the power line. The power line channel transmission environment is very harsh, there are various complex noise inte...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L27/26H04B3/54
CPCH04B3/542H04L27/2656
Inventor 不公告发明人
Owner 深圳市力合微电子股份有限公司
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