The Design and Implementation of Spread Spectrum Base-Band System Based on Software Radio

This paper designs and accomplishes a fast frequency hopping system with 40 Khps based on the software radio. The paper presents several innovational techniques for realizing hopping system, such as frequency hopper, frequency hopping sequence, bit synchronization, hopping pattern synchronization, hopping signal demodulation, etc. Then the paper presents system´s detailed hardware/software architecture of transmitter/receiver composed of programmable components such as DSP, FPGA and DDC and so on, the paper also discusses the solutions of core model in the system. At last, the paper presents the actual test results.