Searching low sidelobes maximal length sequence based on simulated an-nealing algorithm
In radar system detection,in order to reduce noise interference and improve radar de-tection capability,low auto-correlation side-lobe sequences are needed.The maximum length se-quences is generated by the linear feedback shift register,and the periodic auto-correlation is bet-ter,but the aperiodic auto-correlation function side-lobe is higher.In this paper,the merit factors of the register-generated MLS is taken as the objective function,and the simulated annealing al-gorithm is used to find the optimal value of the initializing register and maximize the objective function.The MATLAB simulation experiment shows that the merit factors of the MLS genera-ted by the optimal value of the register based on the simulated annealing algorithm is higher than that of the initialization,that is,the aperiodic auto-correlation side-lobe decreases.
The maximum length sequencesmerit factorssimulated annealing algorithm