A high-precision time-of-arrival calculation method and device for burst communication system
A technology of arrival time and calculation method, applied in multiplex communication, time division multiplex system, electrical components, etc., can solve problems such as excessive loop jitter, short update cycle, and increased communication link interference, etc. Achieve accurate TOA information, strong dynamic adaptability, and overcome poor stability
Active Publication Date: 2022-05-24
SOUTHWEST CHINA RES INST OF ELECTRONICS EQUIP
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Problems solved by technology
This scheme has the following defects: because the correlation calculation is only performed at the sampling rate, the calculation accuracy of TOA is limited to the time resolution of a sampling point. When the sampling rate is limited by factors such as power consumption and device level, high-precision Calculation results
This technology can be used for burst communication, but it has the following defects under large maneuvering and high dynamic conditions: 1. In order to track fast-changing external conditions, the update period of the loop is short, which may easily lead to excessive loop jitter, resulting in TOA calculation value The drastic change of TOA reduces the calculation accuracy of TOA; 2. In order to meet the convergence requirements of the loop, the length of a single burst time slot is longer, which increases the probability of communication link being interfered and reduces the validity of TOA calculation value
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[0036] The present invention will be further described below with reference to the accompanying drawings.
[0037] like figure 1 As shown, the present invention adopts an algorithm based on multi-channel correlation value fitting sampling points to achieve high-precision TOA acquisition, and the specific scheme is as follows:
[0038] Step 1. The wireless network nodes A and B communicate with each other, and the node A sends a frame of data including the sending time label and the agreed pseudo-random sequence to the node B;
[0039] Step 2, Node B performs coarse synchronization to determine the received pseudorandom sequence time starting point and coarse synchronization moment;
[0040] Step 3: Node B samples the received data multiple times to obtain M+1 groups of data;
[0041] Step 4. Node B oversamples the locally agreed pseudo-random sequence to obtain a set of local sequence data;
[0042] Step 5. The local sequence data and the M+1 groups of data are respectively...
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The invention relates to a high-precision time-of-arrival calculation method for a burst communication system, comprising: step 1, wireless network nodes A and B communicate with each other, and node A sends a frame of data including a sending time label and an agreed pseudo-random sequence to Node B; Step 2, Node B performs coarse synchronization to determine the time starting point and rough synchronization time of the received pseudo-random sequence; Step 3, Node B performs multiple samplings on the received data from the starting point of the pseudo-random sequence time backwards to obtain M+ 1 set of data; step 4, Node B oversamples the locally agreed pseudo-random sequence to obtain a set of local sequence data; step 5, correlates and accumulates the local sequence data with M+1 sets of data to obtain the absolute value, and obtains M +1 correlation value; step 6, using a fitting algorithm to perform fitting calculations on M+1 correlation values to obtain high-precision synchronization time points, thereby calculating local high-precision arrival time information. The calculation method of the invention is simple to realize and has high calculation precision.
Description
technical field [0001] The invention relates to the field of wireless communication, in particular to a high-precision time-of-arrival calculation method and device for a burst communication system. Background technique [0002] In the distributed coordination system using wireless interconnection, the measurement of Time of Arrival (TOA) is the basis for realizing the unified time and collaborative work of the whole network. Due to the characteristics of short transmission time and random burst, burst communication is suitable for specific fields where nodes have strong mobility, high dynamics and are easily interfered. Therefore, it is of great significance to accurately measure TOA in the burst communication system. [0003] Because the burst communication adopts the short time slot and burst transmission mode, it needs to complete the accurate TOA calculation in a relatively short time (usually in the order of milliseconds or hundreds of microseconds). In the conventio...
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IPC IPC(8): H04J3/06
CPCH04J3/0638
Inventor 谌伟高翔陈卓然周章伦贺岷珏
Owner SOUTHWEST CHINA RES INST OF ELECTRONICS EQUIP