1. GPS antenna can be divided into vertical polarization and circular polarization in terms of polarization mode. With current technology, the effect of vertical polarization is not as good as tha...
At present, the vast majority of GPS antennas are right-handed polarized ceramic media, consisting of ceramic antennas, low-noise signal modules, cables and connectors. Ceramic antenna, also know...
The whole acquisition system is scattered in various parts of the bridge. The bridge is divided into several sections according to the region. In the main sections, signal collector stations are p...
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 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...
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