Modified simulated Annealing Algorithm for Poly Phase Code Design

Multiple radar systems and spread spectrum communication systems can fundamentally improve the system performance by using a group of specially designed orthogonal polyphase coded signal but the synthesis of orthogonal polyphase codes with good autocorrelation and cross-correlation properties is a nonlinear multivariable optimization problem, which is usually difficult to tackle. A modified simulated annealing algorithm (MSAA) is proposed as a statistical technique for obtaining approximate solutions to combinatorial optimization problems. The proposed algorithm is a combination of simulated annealing and Hamming scan algorithms. This algorithm is used to design orthogonal polyphase sequence sets which have good correlation properties. Some of the synthesized results are presented, and their properties are better than other known in the literature. The synthesized polyphase sequence sets are promising for practical application to multiple radar systems and spread spectrum communication applications. The convergence rate of the algorithm is also good