Method, equipment and system to deal with optical orthogonal frequency division multiplexing (OFDM) signal

An orthogonal frequency division and multiplexing signal technology, applied in the field of communication, can solve the problem of large synchronization error between the receiving end and the transmitting end, and achieve the effect of reducing the synchronization error and increasing the positioning accuracy

Inactive Publication Date: 2012-01-11
HUAWEI TECH CO LTD +1
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Problems solved by technology

[0005] In order to solve the problem of large synchronization errors between the receiving end and the sending end, the embodiment of the present invention provides a method, device and system for processing optical orthogonal frequency division multiplexing signals

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  • Method, equipment and system to deal with optical orthogonal frequency division multiplexing (OFDM) signal
  • Method, equipment and system to deal with optical orthogonal frequency division multiplexing (OFDM) signal
  • Method, equipment and system to deal with optical orthogonal frequency division multiplexing (OFDM) signal

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Embodiment Construction

[0036] 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.

[0037] see figure 1 , an embodiment of the present invention provides a method for processing optical OFDM signals, including:

[0038] 101: Receive an optical orthogonal frequency division multiplexing signal, and acquire a sampling signal of the optical orthogonal frequency division multiplexing signal, the optical orthogonal frequency division multiplexing signal has a synchronous training sequence, and the synchronous training sequence is at least Contains four parts, wherein, the first part is the constant envelope zero autocorrelation sequence, the second part is the conjugate symmetry body of the constant envelope zero autocorrelation sequence, the third part is the repetition of the first part, and the first part The fourth pa...

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Abstract

This invention provides a Method, equipment and system to deal with optical orthogonal frequency division multiplexing (OFDM) signal, which is related to the area of communication technology. The mentioned methods include: the receiving terminal receives OFDM signal, and obtains its sample signal. The mentioned OFDM signal is equipped with synchronous training sequence, which is used to achieve synchronization of the receiving terminal and transmitting terminal; the first sample point is obtained according to the mentioned sample signal; the second sample point is gained through the mentioned first sample point, and the starting point of OFDM signal is acquired through the second sample point. This invention ascertains the starting point of OFDM signal by means of three levels synchronization method, which greatly increases the accuracy of obtaining the OFDM starting point, and can reduce achieve synchronization error, and achieve the accurate synchronization of signals in cases of feeble signal.

Description

technical field [0001] The invention relates to the field of communication technology, in particular to a method, device and system for processing optical orthogonal frequency division multiplexing signals. Background technique [0002] Optical OFDM (Orthogonal Frequency Division Multiplexing, Orthogonal Frequency Division Multiplexing) is a new technology that introduces OFDM technology in wireless to the field of optical communication. It can be regarded as a modulation technology or a a multiplexing technique. The basic principle of the optical OFDM signal is: divide the high-speed serial signal in the time domain into multiple low-speed parallel signals, divide the frequency domain channel into several orthogonal sub-channels (that is, optical OFDM symbol subcarriers), and then modulate the low-speed parallel signals into transmission on each subchannel. However, since optical OFDM is a multi-carrier modulation technology, it is much more sensitive to synchronization e...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L27/26H04B10/12H04B10/69
CPCH04L27/2662H04B10/69H04L27/2697H04L27/2675
Inventor 刘博忻向军刘磊
Owner HUAWEI TECH CO LTD
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