Patent ID: 11874408
Assignee: NEC CORPORATION
Field: Measurement (Instruments)
Classification: CPC G | IPC G

Claim 3:
4. The sonar apparatus according to claim 1, wherein the processor, when executing the program instructions stored in the memory:
calculates a cross-correlation value RSS(τ), an autocorrelation Rμμ(τ) of the cross-correlation value, and an autocorrelation Raa(τ) of the autocorrelation Rμμ(τ) of the cross-correlation value, and
performs frequency analysis of at least one of the cross-correlation value RSS(τ), the autocorrelation Rμμ(τ) of the cross-correlation value, and the autocorrelation Raa(τ) of the autocorrelation Rμμ(τ) of the cross-correlation value to derive the target velocity.