All-digital satellite signal simulator
A satellite signal and digital signal technology, applied in digital transmission system, multi-carrier system, radio transmission system, etc., can solve the problem that the consistency of multiplex modulation units cannot be guaranteed, the relative bandwidth of radio frequency filters is small, and local oscillator signals cannot be filtered. In addition to other problems, to solve the problem of inconsistency in the code stream rate, easy to implement, and ensure the integrity of the code stream
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[0040] refer to figure 1. In the embodiment described below, an all-digital satellite signal simulation source adopts a CPCI board that can be inserted into a CPCI chassis structurally. The board is mainly composed of a digital processing part and an analog processing part. The CPCI board is provided with a digital processing part and an analog processing part, and the digital processing part adopts Box_Muller logic algorithm software, which includes a digital-to-analog converter of an external point-frequency clock source, an external memory connected to the field programmable digital signal processor DSP Gate Array FPGA. The analog processing part is mainly composed of broadband filter attenuators. Digital signal processor DSP can choose a high-performance TMS320C6455 chip of TI Company as the system control and management center. Digital signal processor DSP external memory capacity can be 2Gb and flash memory capacity can be 512Mb. As the main algorithm processing uni...
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