High-precision synchronous data transmission device and data transmission method

Abstract

The invention provides a high-precision synchronous data transmission device and a data transmission method. When a cell downlink receiving module cannot parse virtual cell information, an uplink signal source processing module calculates the uplink energy of a target signal source according to an uplink target identifier and the position information of a synchronization point acquired by a synchronization point information receiving module to determine the accurate position of a target. Otherwise, the cell downlink receiving module parses the communication link between a virtual cell downlink transmitting module and the target to get an uplink target identifier and the position of a synchronization point. Therefore, the problem that the indoor energy detection equipment has outdoor blind spots is solved, and the distance of target detection is increased.

Description

technical field [0001] The invention relates to a data transmission method in the field of mobile communication, in particular to a high-precision synchronous data transmission device and a data transmission method. Background technique [0002] When using Wideband Code Division Multiple Access (WCDMA) for target tracking, an outdoor active system is usually used to communicate with the target to obtain the target’s uplink target identification and synchronization point position, and calculate the uplink of the target signal source. energy in order to determine the location of the building where the target is located. An indoor energy detection system then enters the building and is used to pinpoint the target. [0003] However, in actual use, there may be situations where the indoor energy detection system cannot communicate with the outdoor active system, or the communication effect is low, resulting in the inability to accurately locate the target. [0004] In order to ...

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Problems solved by technology

[0003] However, in actual use, there will be situations where the indoor energy detection system cannot communicate with the outdoor active system, or the communication effect is low, resulting in the inability to accurately locate the target

[0004] In order to solve the above problems, in the prior art, a low-frequency high-power serial port data transmission module will be used to identify the uplink target (such as WCDMA (Wideband Code Division Multiple Access, Wideband Code Division Multiple Access) as an uplink scrambling code, LTE (Long Term Evolution, Long-term evolution) is to send PUSCH (Physical Uplink Shared Channel) and synchronization point position information to the receiving module, but this method will cause Relatively large delay, for systems such as WCDMA that require chip-level precise alignment, it will lead to the inability to synchronize or measure the target signal

In addition, the use of low-frequency high-power serial data transmission modules also needs to use the two data transmission modules to send data to each other for a period of time before transmitting data, and measure the RTT (Round-TripTime, round-trip delay) time, according to RTT (Round-Trip Time Round-trip delay) time estimation time, but the accuracy of this method is very low, which will lead to synchronization drift or inaccurate energy measurement

The existing data transmission module has a poor crystal oscillator, which will also cause problems such as decoding errors in the sent data

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