Radar signal modulator with bandwidth compensation and frequency offset sequence
AssigneesInfineon Technologies AG, Politecnico Di Milano
InventorsDmytro Cherniak, Salvatore Levantino, Mario Mercandelli
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Abstract
Systems, methods, and circuitries are provided for generating a frequency hopping radar signal. In one example, a radar signal modulator include a frequency offset generator, a phase locked loop, and a bandwidth compensation circuitry. The frequency offset generator is configured to generate a sequence of frequency offsets. The bandwidth compensation circuitry is configured to combine a modulation signal and the sequence of frequency offsets to generate a bandwidth compensated signal. The PLL is configured to receive the bandwidth compensated signal and generate a frequency hopping radar signal based on the bandwidth compensated signal.
Claims19
A radar signal modulator, comprising:
- a frequency offset generator configured to generate a sequence of frequency offsets;
- a phase locked loop (PLL);
- and
- a bandwidth compensation circuitry, comprising
- combination circuitry configured to combine a modulation signal with the sequence of frequency offsets and a frequency command word for the PLL to generate an adjusted frequency command word;
- and
- a pre-emphasis filter that filters the adjusted frequency command word to generate a bandwidth compensated signal,
- wherein the PLL is configured to receive the bandwidth compensated signal and generate a frequency hopping radar signal based on the bandwidth compensated signal.
A radar signal modulator, comprising:
- a frequency offset generator configured to generate a sequence of frequency offsets;
- a phase locked loop (PLL);
- and
- a bandwidth compensation circuitry, comprising low-pass injection circuitry configured to:
- receive a modulation signal;
- receive the sequence of frequency offsets;
- and
- generate at least one low-pass injection signal based on the sequence of frequency offsets and the modulation signal;
- and
- high-pass injection circuitry configured to:
- receive the modulation signal;
- receive the sequence of frequency offsets;
- and
- generate at least one high-pass injection signal based on the sequence of frequency offsets and the modulation signal,
- wherein the PLL is configured to:
- receive the at least one low-pass injection signal at a low-pass injection point;
- receive the at least one high-pass injection signal at a high-pass injection point;
- and
- generate a frequency hopping radar signal based on the at least one low-pass injection signal and the at least one high-pass injection signal.
A method, comprising:
- generating a sequence of frequency offsets;
- generating at least one low-pass injection signal by combining a modulation signal with a sequence of frequency offsets and a frequency command word for a phase locked loop (PLL);
- generating at least one high-pass injection signal based on the modulation signal and the sequence of frequency offsets;
- providing the at least one low-pass injection signal to a low-pass injection point of the PLL;
- and
- providing the high-pass injection signal to a high-pass injection point of the PLL to cause the PLL to generate a frequency hopping radar signal;
- transmitting the frequency hopping radar signal;
- and
- processing received signals corresponding to reflections of the frequency hopping radar signal to detect objects.
Dependencies are inferred from the claim text.