特長The Multi-Channel, Multi-Mode Receiver (MCMM-RX) system is a four channels wide bandwidth radio receiver using a Innovative Integration X5 210M card in a industrial or compact PCI computer. Custom logic is implemented in the Virtex5 SX95T for the signal processing and data flow controls. Inputs to the system are four analog inputs and sample rate clocks upto 180 MHz into four receive channels. Each channel has independent software defined tuner and baseband demodulation. Demodulation module includes BPSK, QPSK, pi/4 QPSK, and 8PSK. MCMM-RX can be integrated into a PC architecture computer system with data recording capability using RAID array or hard disks. The X5 210M modules provide IF receiver and integrate with the host system PCI Express (PCIe) bus. The host computer configures and controls each module via the PCIe bus as well receives the baseband data streams. The system is easily expanded by adding additional X5 210M modules, up to the limit of the PCIe slots available in the system. The MCMM-RX system software runs on the host PC processor using Windows or Linux. The software provides the operator with channel activity information and allows the operator to tune the channels and select the baseband demodulation type. Remote access to the system, if required, is provided using Ethernet. In addition to remote operation of the system via Ethernet, data can also be retrieved from the system on demand. As shown in the block diagram of the receiver, the IF input is digitized then processed in the FPGA to four channels. The IF input is digitized upto 180 MHz and all channels are running synchronously. Channel activity is detected using power detection with a programmable threshold. If channel activity is detected, the system can be alerted.
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