| 摘要 |
<p>The amount of phase shift occurring between an I signal and a Q signal after quadrature detection of a signal reflected by a target is corrected in real time and appropriately to suppress the deterioration of an estimate precision of an arrival angle to the target. A radio frequency transmission signal is transmitted from a transmitter antenna in a given transmission period, and a signal of a reflected wave reflected by the target is received by a receiver antenna. A first transmission signal obtained by modifying a code having a third sub-code sequence and a fourth sub-code sequence coupled to each other is generated in a first transmission period, among first and second sub-code sequences each having a sub-code length obtained by dividing a code sequence having a given code length, and third, fourth, fifth, and sixth sub-code sequences obtained by multiplying each of the first and second sub-code sequences by two kinds of different coefficients. A second transmission period obtained by modifying a code having a fourth sub-code sequence and a fifth sub-code sequence coupled to each other is generated in a second transmission period. The generated first and second transmission signals are converted into radio frequency transmission signals, and transmitted from the transmitter antenna.</p> |
