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A data communication method and communication equipment

A data communication and data technology, applied in the field of optical communication, can solve the problem that communication methods and systems cannot jointly estimate carrier frequency offset and phase noise, etc.

Active Publication Date: 2019-05-28
HUAZHONG UNIV OF SCI & TECH
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Problems solved by technology

[0005] Aiming at the defects of the prior art, the purpose of the present invention is to solve the technical problem that the existing communication methods and systems cannot effectively perform joint estimation of carrier frequency offset and phase noise

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  • A data communication method and communication equipment
  • A data communication method and communication equipment
  • A data communication method and communication equipment

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Embodiment Construction

[0048] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention. In addition, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not constitute a conflict with each other.

[0049] Aiming at the shortcomings of the current technology, the present invention proposes a data communication method, which is a pilot-based CO-FBMC / OQAM joint carrier frequency offset and phase noise estimation method. The influence of inherent interference on pilots is reduced to zero, and at the same time, the power of one column of pilots is amplified by k times to make it easy to identif...

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Abstract

The invention discloses a data communication method and communication equipment. The method comprises the steps that a data symbol, a first pilot frequency sequence and a second pilot frequency sequence sent by a sending end are received, the power of the first pilot frequency sequence is larger than that of the second pilot frequency sequence, the frequency domain position corresponding to a spectral line with the strongest power in received data is determined, and the spectral line with the strongest power is a spectral line corresponding to the first pilot frequency sequence; he frequency shift of the data received by the receiving end is determined according to the difference value between the frequency domain position corresponding to the strongest spectral line and the frequency domain position of the first pilot frequency sequence at the transmitting end, and frequency shift compensation is performed on the received data; And the phase noise of the data received by the receivingend is determined according to the values, which are not zero, in the first pilot frequency sequence and the second pilot frequency sequence, phase noise compensation is carried out on the received data, and decoding is performed to obtain data information corresponding to the data symbol sent by the sending end. Compared with an existing phase noise compensation scheme, the method has the capability of eliminating inherent interference and performing frequency offset compensation at the same time.

Description

technical field [0001] The present invention relates to the technical field of optical communication, and more specifically, to a data communication method and communication equipment. Background technique [0002] The carrier in the optical communication coherent optical multicarrier modulation and demodulation technology (Filter bank Multicarrier / offsetquadrature amplitude modulation, CO-FBMC / OQAM) system is susceptible to phase noise interference, which leads to the rotation and divergence of the QAM modulation constellation at the receiving end. The phase noise compensation scheme of high frequency is seriously affected by the carrier frequency offset. Phase noise mainly comes from laser linewidth and link nonlinearity. Due to the long symbol length and high peak-to-average power ratio of the CO-FBMC / OQAM system, its transmission performance is more susceptible to phase noise degradation. How to efficiently monitor and compensate for phase noise It is a key issue in the...

Claims

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Application Information

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IPC IPC(8): H04L27/00H04L27/34H04L25/03H04L5/00
Inventor 罗风光游璧毓杨柳杨帅龙陈丹慧倪垚李斌
Owner HUAZHONG UNIV OF SCI & TECH
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