Distance measurement arrangement for motor vehicles, transmits pseudo-random noise code modulated electromagnetic wave, receives echo signal, and derives distance from time and phase values

摘要

The distance measurement arrangement has a pseudo-random noise code generator for generating a code of defined bit length synchronized to a reference clock signal, a transmitter for sending a first forward electromagnetic wave modulated by the code, a receiver for receiving a first echo wave reflected from the object and converting it into a binary signal, a correlator, timer measurement device, transmission pulse generation and delay devices, a second time measurement device and a device for object distance computation from time and phase values.