Design of Spread Spectrum Code with Long Period

A spread spectrum sequence code with long period is designed.A design method for generating spread spectrum code with long period is carried out based on the principle of PN code and design method of P code used in spread spectrum communication system in general.The length and complexity of the code are expanded by truncating output and non-linear combination of several m sequences.The simulation results show that the correlation of the code generated by this method is near to that of P code,and the period of it is more than 5 years under the condition of clock of 10.23 MHz.