A FPGA-based method for modeling and generation of the time-varying electromagnetic environment

The frequency hopping radio has been widely used for its anti-interference ability. However, in the installation, testing and evaluation of short-wave frequency hopping radio, a realistic time-varying electromagnetic environment support is lacking. Hence, it is important to construct the time-varying electromagnetic environment which the short-wave frequency-hopping radio may face. To solve this problem, this paper firstly finds out live kinds of signals commonly faced by the short-wave frequency-hopping radio and extracts their time-varying parameters by signal simulations with MATLAB. After that, a model based on the traversal is proposed, which accurately reconstructs the time-varying electromagnetic environment. Finally, this model is implemented on the FPGA, which could generate a feasible time-varying signal to represent the electromagnetic environment. This device may be useful for the installation, debugging, testing, evaluation and other tasks of short-wave frequency hopping radio.