RADAR DEVICE

摘要

A transmission signal generator produces N transmission pulses for every transmission period from N (N: an integer of 2 or more) kinds of transmission code sequences and (N×M) (M: an integer of 2 or more) kinds of orthogonal code sequences, the transmission pulses being obtained by multiplying transmission codes of the N kinds of transmission code sequences, with selected N orthogonal codes of the (N×M) kinds of orthogonal code sequences. In one transmission period, a radio transmitter converts the N transmission pulses to high-frequency signals, and transmits the signals through a transmission antenna. The (N×M) kinds of orthogonal code sequences are code sequences which satisfy a predetermined mathematical expression in M transmission periods.

主权项

1. A radar device comprising:
a transmission signal generator which produces N transmission pulses for every transmission period from N (N: an integer of 2 or more) kinds of transmission code sequences and (N×M) (M: an integer of 2 or more) kinds of orthogonal code sequences, the transmission pulses being obtained by multiplying transmission codes of the N kinds of transmission code sequences, with selected N orthogonal codes of the (N×M) kinds of orthogonal code sequences; and a radio transmitter which, in one transmission period, converts the N transmission pulses to high-frequency signals, and transmits the signals through a transmission antenna, wherein the (N×M) kinds of orthogonal code sequences are code sequences which satisfy an expression (1) in M transmission periods; and(C11C12C13…C1MC21C22C23…C2MC31C32C33…C3M⋮⋮⋮⋱⋮CN1CN2CN3…CNM)(C11C21C31…CN1C1MC2MC3M…CNMC12C22C32…CN2C11C21C31…CN1C13C23C33…CN3C12C22C32…CN2⋮⋮⋮⋱⋮⋮⋮⋮⋱⋮C1MC2MC3M…CNMC1M-1C2M-1C3M-1…CNM-1)=(M00…0*00…00M0…00*0…000M…000*…0⋮⋮⋮⋱⋮⋮⋮⋮⋱⋮000…M000…*)(1) wherein CNM is an orthogonal code which is multiplied with an N-th transmission code in an M-th transmission period.