摘要
盲解调技术是获取非协作数字通信信号上携带有用信息的最关键技术之一.首先对现有数字通信信号盲解调进行了综述,然后在我们已发表论文的基础上,进一步完善非线性动力学系统噪声减缩的理论和算法,对负信噪比BPSK调制载频上的随机码流进行盲解调.试测试结果表明,信噪比在Eb/N0>7d B区间,噪声减缩的盲解调的误码率为0,信噪比在0<Eb/N0<7d B区间,噪声减缩的盲解调的误码曲线低于现有非相干解调方法的误码曲线.噪声减缩的盲解调的误码率接近或重合或低于现有相干解调的理论误码曲线.可见,采用非线性动力学系统的噪声减缩的盲解调与现有非相干解调的处理能力比较,至少提高了7d B的处理能力.测试结果表明研究成果为电子侦察信号处理的盲解调提供了一种有效的方法.
Blind demodulation is one of the most important technologies to obtain useful information on non cooperative digital communication signals. This article firstly summarizes the blind demodulation of existing digital communication signal. And then it further improves the theory and noise reduction algorithm of nonlinear dynamical system on the basis of our published paper to blind demodulation the random bit stream on carrier frequency modulated by BPSK with negative SNR. The test results show that Bit error rate is 0, using nonlinear dynamical system noise reduction under Eb/N0〉7d B and blind demodulation error curve of noise reduction is lower than the error curve of existing non coherent demodulation method under 0〈Eb/N0〈7d B. Therefore, the blind demodulation of nonlinear dynamical system noise reduction compared with existing non coherent demodulation at least improves the processing capacity of 7 db. Test results show that the research results provide an effective method of blind demodulation for electronic reconnaissance signal processing.
出处
《计算机系统应用》
2016年第10期27-38,共12页
Computer Systems & Applications
基金
陕西省自然基金重点项目(2014JZ019)
中央高校基本科研业务费资助项目(CHD310824162021)
关键词
BPSK调制
噪声减缩
盲解调
随机码流
误码率
BPSK modulation
noise reduction
blind demodulation
random code stream
error rate
