Long range detection of UWB radar using interpulse cyclic phase code

UWB impulse radar is generally used just for short range measurements because of transmitted power restrictions and due to its ultra wide bandwidth. In this paper, we consider the advantage of the coherent integration between pulses. The transmitted energy can be increased by adopting short PRI mode. The S/N ratio of the receiving signal is also able to be improved by the coherent integration. We suggest a method for enhancement of long range detection performance of UWB impulse radar using inter-pulse cyclic phase code, which mitigates the range ambiguity problem on short PRI mode. In this method, each transmitted pulse is modulated by P4 code and is modulated by the same phase in intra-pulse. The range of the target is obtained by adding the PRI delay and the corresponding range bin. We show the experimental results conducted on public way using 24 GHz radar with power of 10 mW based on the specified low power radio station to verify the effectiveness of the method.