Real-time wideband DDC based on parallel architecture in synthetic instrument

摘要

Restricted by the processing speed of device, bandwidth and filter performance of Wideband Digital IF Process are hard to achieve a breakthrough. In this paper, to solving the problems during wideband digital IF process, a parallel processing architecture is presented to efficiently lower the sample rate and process cost through multiple channels of parallel process. This paper deduces the digital down conversion technique principle, analyzes output phase difference of multiple Numerical Control Oscillator 's (NCO) output and error factor for reducing SNR, and provides the index distribution basis for the specific engineering design. Finally, the correctness is verified by the experimental platform.