A method for high-dynamic DS-FH signal simulation based on high-order DDS

摘要

The traditional GNSS (Global Navigation Satellites System) signal simulation method cannot be applied to the DS-FH signal directly for the carrier frequency is hopping. Especially under high-dynamic conditions, it increases the difficulty to precisely simulate Doppler shift and synthesize real-time signal phase for DS-FH (Direct Sequence - Frequency Hopping) signal simulation. In this paper, the high-dynamic DS-FH signal model is demonstrated and the approach to generate hopping frequency is discussed. Then the high-order DDS (direct digital synthesis) model and its parameter design criteria are provided. Simulation results indicate that the method is effective to simulate the high-dynamic DS-FH signal.