BPL long wave timing frequency adjustment receiver

Abstract

The invention provides a BPL long wave timing frequency adjustment receiver. An antenna unit receives BPL long wave time signals. A radio frequency signal processing unit carries out pre-filtering, amplitude amplifying, automatic gain controlling and matching on the received signals, and analog-digital conversion is carried out through an AD sampling unit. A baseband signal processing unit carries out self-adaptation trapped wave and FIR band pass filtering on the received digital signals, searches for the BPL long wave time signals, carries out heaven and earth wave recognizing and separating, carrier phase tracking, pulse period recognizing and demodulating, carries out decoding and automatic timing frequency correcting on BPL time-code data, and transmits time information, 1PPS timing signals and 10 MHz signals to a control display output unit. The BPL long wave timing frequency adjustment receiver has the advantages that digitization is achieved, the size is small, the weight is low, the function is complete, operation is easy, and expandability is achieved. Standard time information and standard frequency signals are provided for users.

Description

technical field [0001] The invention relates to a long-wave timing signal receiving terminal, which belongs to the field of electronic circuits and signal processing, and in particular to a BPL digital long-wave timing frequency correction receiver, which is used for digital reception and processing of BPL long-wave timing signals, and provides users with standard time information and Standard frequency signal. Background technique [0002] The BPL long-wave timing system is a long-range high-precision large-scale land-based radio timing system independently mastered by my country. It has the advantages of long operating distance, high positioning accuracy, good stability, and strong reliability. Secondly, it can also be used for scientific research such as communication, radio wave propagation, ionosphere and meteorology. The BPL long-wave timing system mainly uses the stability of long-wave signal ground wave propagation and the characteristics of accurate prediction of pr...

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Problems solved by technology

[0004] However, the PO21 BPL full-automatic long-wave timing calibration receiver commonly used in China is a stereotyped product in the 1980s. It mainly uses analog technology and discrete components to realize the reception and processing of long-wave timing signals. It has the advantages of volume and weight. At the same time, the PO21 long-wave receiver lacks the time data information decoding function. To realize the timing function, it must first implement coarse synchronization with the help of a third party (such as short-wave), and then perform related TOC operations to achieve the final timing function. Its operation The disadvantages such as cumbersomeness have seriously affected the use of users

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