TACAN机载设备ECCM研究

Research on ECCM of TACAN Airborne Trans-Receiver

针对现有TACAN机载设备不具备反电子侦察和反电子欺骗能力的问题,利用带限噪声波形代替脉冲组编码信号来实现二次雷达测距,并给出了机载测距询问器和地面应答器的实现结构。提出了在TACAN地面信标现有的发射信号当中增加额外的脉冲组编码信号来实现测距应答延迟误差的信息发播。分析结果表明,经改进后的TACAN机载设备具备很好的电子对抗能力。

Since the traditional TACAN airborne trans-receiver does not have the capability of electronic anti-reconnaissance and anti-deception, some modifications should he made to give the TACAN airborne trans-receiver a better performance in modem electronic environment. The ranging process of TACAN is changed in our paper, by using a pseudo-random band-limited white Gaussian noise waveform, instead of the traditional pulses-coded signal. Both the TACAN airborne ranging inquiry equipment and the beacon＇s range answering equipment arc given to design the practical hardware. Because the hardware delay of the beacon＇s range answering equipment will cause a ranging inaccuracy, the message of hardware delay is sent to the airborne equipment by using the pulse-cod- ed pulses which are now widely used in TACAN systems. And this means that only little changes would be made to the hardware of TACAN beacon. Finally, our analysis results show that a better ECCM capability would be achieved when our modifications are made to the TACAN ranging process.