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The paper introduces a novel software defined radio system named Sora and analyzes its system architecture. For the special characteristics of radio channel in high speed scenario,we research a novel scheme based on wireless cell network WCDMA for channel sounding in High-Speed Railway. According to developing an application that simulates the transmition and reception of WCDMA siganl by User-Mode...
It requires accurate synchronization among the MCU, servo controllers and sensors in CNC systems for time stamping of data and motion control. This paper presents the design and implementation of time synchronization for CNC systems which employ switched Ethernet as its communication module. The method adopts the clock of switches as the master clock instead of that of MCU which usual is. To obtain...
In various CNC systems the MCU, servo controllers and sensors all need to be accurately synchronized for time stamping of data and motion control. This paper presents a time synchronization method for CNC systems based on switched Ehternet in which message delay variation through switches must be minimized or compensated to obtain accurate time synchronization. The method uses the switch as the time...
Pseudo-noise (PN) sequence is widely used in wireless transmission systems for synchronization, which is usually performed via cross-correlation, i.e. PN correlator, between the received signal and a locally generated PN sequence. However, the hardware implementation of such a correlator becomes the inhibiting bottleneck of integration due to the long tapped-delay line, particularly in the case of...
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