Research On Design And Implementation Of The QAM Receiver Based On Chaos Hamilton Oscillator

Chaos phenomena are sensitive to initial value and has long-term unpredictable characteristics, which can provide confidentiality for the communication system and improve the performance of communication system, thus aroused people's wide attention and in-depth research.The spatiotemporal chaos Hamilton oscillator is introduced in this paper,which has planar multiple attractors distribution,and the attractor trajectories between each other. For the realization of the multi-band digital communication based on chaos Hamilton oscillator,ideas of regional segmentation Fu Yongqing et al. put forward is introduced .The multi-band digital information theory model of the chaotic modulation and demodulation system is put forward based on the initial value mapping method. The Hamilton chaos oscillator QAM receiver is designed, and to test and verify the performance of the receiver QAM transmitter is also designed. The chaotic communication system consists of baseband modulation, RF modulation, antennas, RF demodulation, and regional segmentation demodulation unit.Modulation and demodulation algorithms are implemented on FPGA, while Verilog is used as the programming language.In this paper, FPGA development platform, using DDS technology, the multi-band information is embedded in Hamilton oscillator,baseband signal modulation,choose the appropriate RF transmit mode, complete transmitter design.Using RF demodulator chip,complete reception and carrier synchronization signal obtained Hamilton oscillator phase locus analog baseband signal. According to the regional division demodulation thought,completion of the regional division of the FPGA demodulator algorithm, the method will be converted into two-dimensional plane locus variable one-dimensional variable, not only in real-time demodulation, and hardware implementation is simple, without chaos synchronization. Finally the transmitter and receiver system hardware design are finished based on chaotic Hamilton oscillator, and results and performance of the design are validated.