Transmitter Noise Considerations in Super-Nyquist FMCW Radar Design
نویسندگان
چکیده
In this letter, we introduce a design consideration for super-Nyquist FMCW radar systems relating to transmitter to receiver noise leakage. Phase noise curves comparing the fundamental DDS frequency and its 2nd super-Nyquist image show a significant increase in relative noise level at all offsets from the carrier. This results in a reduced transmitter signal-to-noise ratio. It is shown with a simple example that this can lead to a significant degradation in receiver sensitivity if not managed properly. We provide a design rule-of-thumb that can be used by radar designers to avoid, or mitigate, this problem.
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