A frame detection method and device
A frame detection and data frame technology, applied in the detection field, can solve the problems of waste of computing resources, waste of processor resources, etc.
Inactive Publication Date: 2017-11-17
GLOBAL INNOVATION AGGREGATORS LLC
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However, when the duty ratio of the channel is low, most of the received complex sample point sequence is noise, and it is a serious waste of computing resources to perform sample-by-sample calculation on these noise complex sample points to determine whether the data frame arrives, especially It is a processor with a strong positive correlation between computing intensity and energy consumption, which will lead to a serious waste of processor resources
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[0101] The frame detection method and device provided by the embodiments of the present invention are applicable to a frame detection module of a receiver in a packet-based burst wireless transmission system. see Figure 4 The schematic diagram of the logical processing module of the receiver is shown. The receiver receives the noise or data signal sent by the transmitter from the air interface, and then the received signal is amplified and filtered by the radio frequency part of the receiver, and then down-converted (possibly multiple down-converted) to the analog baseband, and then form a digital complex sample point sequence through the analog / digital converter, so as to input the complex sample point sequence to the digital baseband part for further processing, and finally capture and restore the data frame. Among them, the frame detection module of the digital baseband part is responsible for judging when the data frame arrives and determining the rough starting position ...
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The invention discloses a frame detection method, comprising: extracting a second set number of multiple sample points from the currently selected first set number of multiple sample points; using the second set number of multiple sample points to calculate Determine the variable and obtain the calculation result; judge whether a data frame has arrived according to the calculation result, and if so, check the start of the data frame between the current extracted initial multiple sampling point and the last extracted initial multiple sampling point position, if not, skip the third set number of double sample points from the current extracted initial double sample point and start to select the first set number of double sample points, and continue to execute the current selection from the currently selected A step of extracting a second set number of multiple sample points from the first set number of multiple sample points. The invention also discloses a frame detection device.
Description
technical field [0001] The present invention relates to the technical field of detection, in particular to a frame detection method and device. Background technique [0002] In a packet-based burst wireless transmission system (such as WiFi, ZigBee, Bluetooth, etc.), the transmitter does not occupy the channel continuously, but occupies the channel in bursts for data transmission when data needs to be transmitted. Therefore, When the receiver receives the data frame sent by the transmitter, the first thing to solve is the frame detection problem, that is, to judge when the frame arrives and to determine the rough starting position of the frame. Currently, there are three main frame detection methods: [0003] 1. Frame detection method based on received signal energy detection [0004] When the receiver does not receive the data frame, the received signal complex sampling point r n Only the noise w n , namely r n =w n ; When the data frame arrives, the received signal c...
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IPC IPC(8): H04L1/00
Inventor 邢志浩
Owner GLOBAL INNOVATION AGGREGATORS LLC