A Synchronization Method of FBMC System Based on Zero Autocorrelation Code

A technology of zero autocorrelation and synchronous symbols, applied in the field of communication, can solve the problems that the synchronization method cannot be applied, the sequence is fixed, and the FBMC system cannot be applied, so as to achieve the effects of insensitivity to complex channels, reducing timing errors, and improving communication reliability

Active Publication Date: 2019-05-14
CENT SOUTH UNIV
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AI Technical Summary

Problems solved by technology

Because the FBMC system has no CP, therefore, the CP-based synchronization method cannot be applied
The general symbol-assisted synchronization method based on special data uses the zero autocorrelation property of the zaddoff sequence for synchronization. This sequence is fixed and cannot be applied to the FBMC system whose parameters have been determined.

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  • A Synchronization Method of FBMC System Based on Zero Autocorrelation Code
  • A Synchronization Method of FBMC System Based on Zero Autocorrelation Code
  • A Synchronization Method of FBMC System Based on Zero Autocorrelation Code

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Embodiment Construction

[0037] The specific implementation manner of the present invention will be further described in detail below in conjunction with the accompanying drawings and specific examples.

[0038] Such as figure 1 Shown, the present invention discloses a kind of synchronization method based on the FBMC system of zero autocorrelation sequence, comprises the following steps:

[0039] 1) The transmitter and receiver use two random data vectors of the same magnitude and After FBMC modulation, two zero autocorrelation codes (ZAC symbols) are generated: and and respectively represent the i-th data of two zero autocorrelation codes; [if the input data of the FBMC system are all of the same magnitude, the generated FBMC symbol is the zero autocorrelation code, then both the real part and the imaginary part can be zero autocorrelation code, that is, such data can be used for synchronization. 】

[0040] The transmitter uses these two zero-autocorrelation codes to combine the synchro...

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Abstract

The invention discloses a synchronization method of an FBMC system based on a zero autocorrelation code. The synchronization method comprises the following steps that 1) a transmitter and a receiver are identical in construction and have symbols of the zero autocorrelation features, and the transmitter constructs synchronization symbols through the symbols and transmits the synchronization symbols; and 2) the receiver uses the same zero autocorrelation code symbols, calculates a real-time measurement value and a real-time threshold, judges the size of the two values and determines a timing point, and calculates the frequency offset error by using the measurement value of the timing point. A timing metric function can be constructed by the zero autocorrelation code generated by the FBMC system so that the system data transmission efficiency can be enhanced. Compared with the conventional methods, the synchronization method has higher estimation accuracy and is insensitive to complex channels so as to enhance the communication reliability.

Description

technical field [0001] The invention relates to the technical field of communication, and mainly relates to a synchronization method of an FBMC system based on a zero autocorrelation code. Background technique [0002] 5G communication technology is committed to meeting multi-dimensional capability indicators such as ultra-high speed, ultra-low latency, high-speed mobility, high energy efficiency, and ultra-high traffic. In order to meet the growing demand, apply to wider application scenarios, and complete more tasks, 5G technology puts forward more requirements for the modulation method of the physical layer. In 5G technology, the length of transmitted data is shorter, the mobility of the system is higher, and the frequency range is wider, and the complexity of the system is lower, so that it can be easily applied to typical scenarios such as the Internet of Things, Internet of Vehicles, and industrial control. The synchronization process is the first step in establishing...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L27/26
CPCH04L27/264H04L27/2655H04L27/2662
Inventor 邓宏贵钱学文杜捷张朝阳
Owner CENT SOUTH UNIV
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