One of the main requirements coming from different clients is to add an "anti-theft alarm" function to our gps trackers, which will trigger the loud BEEP BEEP alarm whenever the motorcyc...
Dangerous goods vehicle monitoring and dispatching system is a software and hardware integrated system integrating global positioning system (GPS), geographic information system (GIS) and wireless...
The PXI acquisition equipment adopts NI PXI-1045 18 slot chassis, and the NI PXI-8187 main controller is the main controller. The acquisition cards are NI PXI 6652, 6602, 4472B, of which: The PXI...
The system is mainly composed of GPS receiver and NI PXI acquisition equipment. The structure is shown in Figure 2: 1. GPS receiver system composition The input end of the GPS synchronous clock ...
1. Vehicle tracking and monitoring The system has established a rapid, accurate and effective information transmission channel between the vehicle and the monitoring center. The monitoring center...
FPGA program mainly completes RF front-end control, USB chip interface control and generation of buffer FIFO to realize data transmission and control. The IF signal is first stored in the buffer a...
The default collected GPS L1 signal is down converted to 3.996 MHz analog IF signal through RF front-end. The central frequency point of BD B1 IF is 3.996875 MHz. It is sampled to 2 bit digital IF...
The FFT algorithm in this paper is based on the relationship between FFT and signal convolution. The specific acquisition process is as follows: 1) The baseband complex signal is obtained by mult...
Satellite IF data is the premise of software receiver research. In order to achieve the design requirements, not only the real-time and high efficiency of the device should be considered, but also...
1.1 RF front-end The main function of the RF front-end is to down convert the RF signals received by the antenna, amplify these weak signals, convert the output signals into digital forms, and pr...
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