A pulse radar device comprising: a transmission system comprising a pulse sequence generator that generates a pulse sequence with use of two sub-pulse sequences, including a first sub-pulse sequence and a second sub-pulse sequence, the two sub-pulse sequences being complementary codes; a π/2-Binary Phase-Shift Keying, π/2-BPSK, modulator that generates modulation signals resultant from π/2-BPSK modulation of the sub-pulses of the sub-pulse sequences; a first phase rotator that provides phase rotation by a first phase for the modulation signals for every specified number of pulses; and a radio transmitter that transmits modulation signals having undergone a phase rotation; whereby the pulse sequence generator is adapted to generate the pulse sequence such that the two sub-pulse sequences satisfy constraint conditions including: (i) the sum of a correlation calculation value between the odd-numbered sub-pulses of the first sub-pulse sequence and the odd-numbered sub-pulses of the first sub-pulse sequence having a specified timing deviation and a correlation calculation value between the odd-numbered sub-pulses of the second sub-pulse sequence and the odd-numbered pulses of the second sub-pulse sequence having the specified timing deviation is zero and (ii) the sum of a correlation calculation value between the even-numbered sub-pulses of the first sub-pulse sequence and the even-numbered sub-pulses of the first sub-pulse sequence having the specified timing deviation and a correlation calculation value between the even-numbered sub-pulses of the second sub-pulse sequence and the even-numbered sub-pulses of the second sub-pulse sequence having the specified timing deviation is zero. a transmission system comprising a pulse sequence generator that generates a pulse sequence with use of two sub-pulse sequences, including a first sub-pulse sequence and a second sub-pulse sequence, the two sub-pulse sequences being complementary codes; a π/2-Binary Phase-Shift Keying, π/2-BPSK, modulator that generates modulation signals resultant from π/2-BPSK modulation of the sub-pulses of the sub-pulse sequences; a first phase rotator that provides phase rotation by a first phase for the modulation signals for every specified number of pulses; and a radio transmitter that transmits modulation signals having undergone a phase rotation; whereby the pulse sequence generator is adapted to generate the pulse sequence such that the two sub-pulse sequences satisfy constraint conditions including: (i) the sum of a correlation calculation value between the odd-numbered sub-pulses of the first sub-pulse sequence and the odd-numbered sub-pulses of the first sub-pulse sequence having a specified timing deviation and a correlation calculation value between the odd-numbered sub-pulses of the second sub-pulse sequence and the odd-numbered pulses of the second sub-pulse sequence having the specified timing deviation is zero and (ii) the sum of a correlation calculation value between the even-numbered sub-pulses of the first sub-pulse sequence and the even-numbered sub-pulses of the first sub-pulse sequence having the specified timing deviation and a correlation calculation value between the even-numbered sub-pulses of the second sub-pulse sequence and the even-numbered sub-pulses of the second sub-pulse sequence having the specified timing deviation is zero. (i) the sum of a correlation calculation value between the odd-numbered sub-pulses of the first sub-pulse sequence and the odd-numbered sub-pulses of the first sub-pulse sequence having a specified timing deviation and a correlation calculation value between the odd-numbered sub-pulses of the second sub-pulse sequence and the odd-numbered pulses of the second sub-pulse sequence having the specified timing deviation is zero and (ii) the sum of a correlation calculation value between the even-numbered sub-pulses of the first sub-pulse sequence and the even-numbered sub-pulses of the first sub-pulse sequence having the specified timing deviation and a correlation calculation value between the even-numbered sub-pulses of the second sub-pulse sequence and the even-numbered sub-pulses of the second sub-pulse sequence having the specified timing deviation is zero.