Research On Simultaneous Receiving And Receiving Technology Based On Digital Cancellation

After years of development in the field of electronic warfare,active jamming technology has developed multiple generations of products,whether it is masked jamming by noise or deceptive jamming by various means to deceive the opponent's radar.In the work of jammers,the isolation between the jammer and the receiver is a more difficult problem.The spontaneous transmission and self-reception of the jamming signal sent by the jammer returns to the receiver,making its own electronic reconnaissance equipment unable to normally and continuously track the enemy.The signal of the square radar reduces the probability of interception of the radar signal,and it also brings difficulties to the further implementation of effective interference.The use of modern signal processing technology to improve this situation has become the research direction of the industry,that is,the use of signal cancellation technology to reduce the power of the transmitted signal into its own receiver,and to improve the receiver's reconnaissance effect,so that interference and reception can work at the same time.It is possible to reduce mutual interference.However,because of the interference of the store and forward method,there is a great correlation between the transmitted signal and the received signal.At the same time,the bandwidth is wider and the amount of data is large.The power of the received signal sent by itself is greater than the power of the received signal,so It is quite difficult for the adaptive method to eliminate the interference signal emitted by itself.Noise-covered interference has a greater impact on the local area because of its high transmit power,and isolation is more difficult.To better interfere with the other party while reducing the interference to itself as much as possible,it is necessary to use newer interference cancellation methods in the existing signal processing theory to improve this situation.This paper focuses on the system architecture of adaptive digital cancellation technology in electronic countermeasures scenarios.First of all,the overall architecture of the jammer receiving and sending system is clarified,and it is determined that the constant gain real-time control technology and the digital cancellation technology based on channelized sending and receiving are mainly used to reduce the demand for transmission and reception isolation on the one hand,and improve the transmission and reception isolation on the other hand,so as to achieve Send and receive at the same time.Secondly,the adaptive digital cancellation technology in the electronic warfare scenario is based on the evaluation and identification of the entire external environment and internal environment,and fully considers the actual application situation.The channelized transceiver technology and the adaptive digital cancellation technology are integrated and used to effectively reduce The resource consumption of the algorithm improves the processing performance;finally,the actual test verification is carried out by constructing and using the existing hardware platform.