Patent ID: 8188909

Claim:
An observation signal processing apparatus capable of successively transmitting pulse signals as search signals modulated by carrier waves a plurality of times per search from a transmission antenna to a domain to be observed, capturing a plurality of reflected signals, being part of the search signals reflected on a target in the domain, at a receiving antenna, performing correlative detection based on the captured reflected signals and delay modulation pulse signals equivalent to delayed version of the pulse signals modulated by the carrier waves to generate a plurality of observation values per search, performing coherent integration on the generated observation value, and supplying outward a specified coherent integration value per search as integration output, the observation value having a phase, which includes information about a relative distance to the target, and an amplitude, which includes information about a relative distance to the target and a reflected sectional area of the target, the observation signal processing apparatus comprising: a first memory for storing a coherent integration count corresponding to the domain to be observed; a search signal transmission section for retrieving the coherent integration count corresponding to the domain to be observed from the first memory and transmitting the pulse signals as the search signals equivalent to the retrieved coherent integration count from the transmission antenna; an observation data memory for controlling the receiving antenna to capture reflected waves as the reflected signals for the transmitted pulse signals equivalent to the coherent integration count and storing the reflected signals as the observation values; a second memory for storing an estimated relative speed for the search; a phase correction amount calculation section for retrieving the estimated relative speed of the target from the second memory and calculating a phase correction amount based on the retrieved estimated relative speed; and a phase-weighted coherent integration section for performing phase-weighted coherent integration on the observation values equivalent to the coherent integration count based on the calculated phase correction amount and supplying outward the acquired integration output.