Patent ID: 7786927

Claim:
A radar, comprising: a radio frequency signal generation unit; a transmission unit; a reception unit; and a signal processing unit, wherein the radio frequency signal generation unit is configured to generate a composite frequency modulation pattern for periodically repeating every sweep period T relative to a time axis, wherein the composite frequency modulation pattern comprises different M (M≧2) sub-frequency modulation patterns in respective time T S(1 to n) , wherein each of said M sub-frequency modulation patterns is composed of different N (N≧2) frequency sections, wherein a start point of each of said N frequency sections is on one of N frequency sweep straight lines, each having a slope S n (n=1 to N), wherein said N frequency sweep straight lines are extended from different initial values f (1 to n) at time t=0 in each of the frequency sweep periods T with different slopes S (1 to n) relative to the time axis where S (1 to n) ≠0, wherein a start point of a kth frequency section (k=1 to N) in each sub-frequency modulation pattern is on a sweep straight line having a slope S k , wherein said N frequency sweep straight lines do not intersect one another within any of the frequency sweep periods T, wherein the transmitted signal modulated by the frequency modulation pattern in each of the sweep times T is transmitted from the transmission unit, wherein the reception unit receives a signal scattered on a target to be detected, and wherein the signal processing unit detects a distance and a speed of the target.