Frame synchronous detection method based on zero correlation zone sequence

A detection method and zero-correlation-band technology, applied in synchronization devices, digital transmission systems, electrical components, etc., can solve the problems of misjudgment of noise as frames, inability to correctly judge frames, and increased false detection rate of frame detection, etc.

Active Publication Date: 2015-12-09
南京易太可通信技术有限公司
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Problems solved by technology

The existing frame detection technology is based on the delay correlation algorithm. When the signal-to-noise ratio is low, in order to be able to detect the frame, the threshold will be set smaller. In this case, the noise will be misjudged as a frame. The false detection rate of frame detection will increase accordingly, making it impossible to correctly judge the arrival of frames

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  • Frame synchronous detection method based on zero correlation zone sequence
  • Frame synchronous detection method based on zero correlation zone sequence
  • Frame synchronous detection method based on zero correlation zone sequence

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Embodiment Construction

[0040] Taking the millimeter wave wireless local area network (IEEE802.11aj) as an example below, the present invention is further illustrated in conjunction with the accompanying drawings. It should be understood that these embodiments are only used to illustrate the present invention and are not intended to limit the scope of the present invention. After reading the present invention, this Modifications to various equivalent forms of the present invention by those skilled in the art fall within the scope defined by the appended claims of the present application.

[0041] In the field of wireless communication, the frame synchronization detection algorithm based on ZCZ sequence has various applications. For example, it is used for frame detection and synchronization. At this time, it is often necessary to send multiple repeated ZCZ sequences on the antenna, and use multiple correlation operations for detection.

[0042] In the embodiment of the present invention, the single-c...

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Abstract

The invention discloses a frame synchronous detection method based on a zero correlation zone (ZCZ) sequence, which is used in a wireless communication system. The frame synchronous detection method comprises the following steps of: firstly, receiving the sequence, and carrying out cross-correlation operation with a local ZCZ sequence; secondly, carrying out conjugate point operation between a front symbol block and a rear symbol block on a cross-correlation operation result; and finally, carrying out a real-part maximum value of each symbol block with a threshold value, and judging whether a frame is coming or not. In order to make the maximum value more apparent, the conjugate point operation between the front symbol block and the rear symbol block on the cross-correlation operation is carried out; and if peak detection is required to be more apparent, the conjugate point operation between the front symbol block and the rear symbol block can be carried out for more times. Compared with the traditional frame detection method, the method is easy to operate and implement, and whether the frame is coming or not can be accurately judged. The method can be applicable to time synchronization, and an initial point of a signal is determined by finding the position of a negative pulse.

Description

technical field [0001] The invention relates to a frame synchronization detection method for a wireless communication system, in particular to a frame synchronization detection method based on a zero correlation zone (ZeroCorrelationZone, ZCZ) sequence, and belongs to the technical field of wireless communication. Background technique [0002] In the communication system, because the signal will be affected by channel fading, noise, etc., there will be a delay in the transmission process, which will make the receiving end unable to correctly judge the starting point of the signal. In order to ensure the system performance and improve the transmission quality and the consistency of the starting point of the signal at the transmitting end and the receiving end, it is necessary to determine the arrival of the frame through the frame detection technology, and then accurately estimate the starting point of the signal through the synchronization technology. [0003] With the emerg...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W56/00H04L27/26
CPCH04L27/2656H04W56/0035
Inventor 何世文欧飞飞薛春林王海明黄永明杨绿溪洪伟张军江华
Owner 南京易太可通信技术有限公司
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