Dynamic Dual-band Frequency-hopping Communication System Structure And Key Module Of Fpga Implementation

Dynamic Double Frequency Hopping Communication System (DDFHCS) with high security,high stability,high interference immunity,good scalability and operability.This paper made a detailed study of the Dynamic Double Frequency Hopping Synchronization Systems,made a analysis of system structure, include synchronization setup, synchronization maintain and deferred-network-entry synchronization.This system using chaos pseudo random sequence as FH sequence generator, improve anti-jamming capability; Frequency synthesis using Direct Digital Frequency Synthesis(DDFS),compared with the traditional frequency synthesizer,DDFS have many advantages,for example, low cost, low power consumption, high resolution and fast converting speed time; because of BPSK’s good performance of anti-noise,easy to produce and lower BER,This paper using BPSK modulation and demodulation system; The most critical part of this system is Dynamic Double frequency hopping synchronous control protocol,make use of the state machine to control the send and receive timing of the carrier.Make the machine switched among Synchronization setup, synchronization maintain and deferred-network-entry synchronization.On the basis of this protocol, Using DSP Builder built key blocks.First, in simulink platform to obtain the simulation results,and then, convert the design model into VHDL and TCL scripts for compilation and synthesis.The results shows that combine the DSP Builder with hardware description language to realize the FPGA design of Dynamic Double Frequency Hopping Communication System is feasible and DDFHCS is technically achievable...