Patent ID: 9239378
Filing Date: 2016-01-19
CPC Classification: G01S

Claim Text:
1. A radar device comprising: a first code generator which, in operation, generates a first code sequence having a defined code length and a second code sequence having the defined code length; a first multiplier which, in operation, multiplies the first code sequence for transmission in a first transmission cycle and the second code sequence for transmission in a second transmission cycle, respectively, by a first orthogonal coefficient sequence, a first transmission signal generator which, in operation, generates a first transmission signal by modulating the first code sequence multiplied by the first orthogonal coefficient sequence and generates a second transmission signal by modulating the second code sequence multiplied by the first orthogonal coefficient sequence; a first RF transmitter which, in operation, converts the first transmission signal into a first radio frequency transmission signal and transmits the first radio frequency transmission signal through a first transmission antenna in the first transmission cycle, and converts the second transmission signal into a second radio frequency transmission signal and transmits the second radio frequency transmission signal through the first transmission antenna in the second transmission cycle; a second multiplier which, in operation, multiplies the second code sequence for transmission in the first transmission cycle and the first code sequence for transmission in the second transmission cycle, respectively, by a second orthogonal coefficient sequence, which is orthogonal to the first orthogonal coefficient sequence; a second transmission signal generator which, in operation, generates a third transmission signal by modulating the second code sequence multiplied by the second orthogonal coefficient sequence and generates a fourth transmission signal by modulating the first code sequence multiplied by the second orthogonal coefficient sequence; and a second RF transmitter which, in operation, converts the third transmission signal into a third radio frequency transmission signal and transmits the third radio frequency transmission signal through a second transmission antenna in the first transmission cycle, and converts the fourth transmission signal into a fourth radio frequency transmission signal and transmits the fourth radio frequency transmission signal through the second transmission antenna in the second transmission cycle, wherein at least one of the first and second orthogonal coefficient sequences includes one or more negative coefficients, and the first and second orthogonal coefficient sequences respectively include coefficients, which are identical to each other, in one of the first and second transmission cycles, and include coefficients, which are different from each other, in the other of the first and second transmission cycles.