Patent ID: 7529290
Filing Date: 2009-05-05
Classification: G01S,H04B

Abstract:
1. A radar apparatus comprising: a code generator that generates a spectrum spread code and a despread code; a transmission section that transmits a signal modulated with the spectrum spread code; a reception section that receives a direct wave from the transmission section and a reflection wave of the transmitted signal from a target; a delay section that delays the despread code stepwise; a despreading processor that performs a despreading processing with respect to a signal obtained from the reflection wave received, with using the despread code delayed; a correlation value detector that detects a correlation value from data output from the despreading processor; a target detector that detects a presence of the target from the correlation value detected; and an adjustment section that adjusts a phase shift between the spectrum spread code and the despread code so that a correlation strength of the direct wave is equal to or larger than a predetermined value, wherein: the code generator comprises a first PLL-circuit-containing parallel/serial conversion circuit for generation of the spectrum spread code and a second PLL-circuit-containing parallel/serial conversion circuit for generation of the despread code, and the adjustment section comprises a delay control section that delays one of inputs to the first and second PLL-circuit-containing parallel/serial conversion circuits so that the correlation strength of the direct wave is equal to or larger than the predetermined value.