A radar device characterized by comprising: a first transmission signal generator including a first orthogonal code generator adapted to generate a first orthogonal code according to a transmission cycle such that one bit of the first orthogonal code corresponds to each transmission cycle, the first transmission signal generator being adapted (i) to generate codes of a first code sequence (a n) having a first code length and a second code sequence (b n) having the first code length, (ii) to generate a modulated first transmission signal based on multiplying the first code sequence (a n) and the first orthogonal code, and (iii) to generate a modulated second transmission signal based on multiplying the second code sequence (b n) and the first orthogonal code, wherein the codes of the first code sequence (a n) and the codes the second code sequence (b n) are formed using the elements 1 and -1 and are code sequences which form a pair of complementary codes; a first RF transmitter adapted (i) to convert the first transmission signal into a high frequency transmission signal and to transmit the result through a first transmission antenna (ANTs1) at a first transmission cycle, and (ii) to convert the second transmission signal into a high frequency transmission signal and to transmit the result through the first transmission antenna (ANTs1) at a second transmission cycle; a second transmission signal generator including a second orthogonal code generator adapted to generate a second orthogonal code according to the transmission cycle such that one bit of the second orthogonal code corresponds to each transmission cycle wherein the second orthogonal code is different from the first orthogonal code, the second transmission signal generator being adapted (i) to generate codes of the first code sequence (a n) and the second code sequence (b n), (ii) to generate a modulated third transmission signal based on multiplying the second code sequence (b n) and the second orthogonal code, and (iii) frvt to generate a modulated fourth transmission signal based on multiplying the first code sequence (a n) and the second orthogonal code, the multiplication resulting in a code sequence (-a n) with reversed signs from the first code sequence (a n); and a second RF transmitter adapted (i) to convert the third transmission signal into a high frequency transmission signal and to transmit the result through a second transmission antenna (ANTs2) at the first transmission cycle, and (ii) to convert the fourth transmission signal into a high frequency transmission signal and to transmit the result through the second transmission antenna (ANTs2) at the second transmission cycle. a first transmission signal generator including a first orthogonal code generator adapted to generate a first orthogonal code according to a transmission cycle such that one bit of the first orthogonal code corresponds to each transmission cycle, the first transmission signal generator being adapted (i) to generate codes of a first code sequence (a n) having a first code length and a second code sequence (b n) having the first code length, (ii) to generate a modulated first transmission signal based on multiplying the first code sequence (a n) and the first orthogonal code, and (iii) to generate a modulated second transmission signal based on multiplying the second code sequence (b n) and the first orthogonal code, wherein the codes of the first code sequence (a n) and the codes the second code sequence (b n) are formed using the elements 1 and -1 and are code sequences which form a pair of complementary codes; a first RF transmitter adapted (i) to convert the first transmission signal into a high frequency transmission signal and to transmit the result through a first transmission antenna (ANTs1) at a first transmission cycle, and (ii) to convert the second transmission signal into a high frequency transmission signal and to transmit the result through the first transmission antenna (ANTs1) at a second transmission cycle; a second transmission signal generator including a second orthogonal code generator adapted to generate a second orthogonal code according to the transmission cycle such that one bit of the second orthogonal code corresponds to each transmission cycle wherein the second orthogonal code is different from the first orthogonal code, the second transmission signal generator being adapted (i) to generate codes of the first code sequence (a n) and the second code sequence (b n), (ii) to generate a modulated third transmission signal based on multiplying the second code sequence (b n) and the second orthogonal code, and (iii) frvt to generate a modulated fourth transmission signal based on multiplying the first code sequence (a n) and the second orthogonal code, the multiplication resulting in a code sequence (-a n) with reversed signs from the first code sequence (a n); and a second RF transmitter adapted (i) to convert the third transmission signal into a high frequency transmission signal and to transmit the result through a second transmission antenna (ANTs2) at the first transmission cycle, and (ii) to convert the fourth transmission signal into a high frequency transmission signal and to transmit the result through the second transmission antenna (ANTs2) at the second transmission cycle.