摘要
针对电子战接收机的高效实现结构及高性能指标要求,提出了一种数字信道化单比特接收机方案.从传统STFT算法结构出发,推导出基于WOLA滤波器组的宽带数字信道化接收机高效结构,利用抽取倍数与信道数目无约束关系,在无需数据内插条件下,将单比特接收技术应用于该结构中,克服了宽带单比特接收机动态范围低和信道化接收机频率分辨率有限的缺点.仿真结果表明,该方案提高了信道化接收机的频率分辨率,且硬件实现效率高,运算复杂度低,瞬时动态范围取决于滤波器形状,能够满足电子战的实时性要求.
To meet the requirement of efficient realization structure and high performance of electronic war receiver,a scheme for digital channelized monobit receiver was proposed.An efficient structure based on WOLA filter banks to realize wideband digital channelized receiver was derived from the traditional STFT algorithm structure.By using the non-constraint relationship between decimation rate and channel number,the monobit receiving technology was applied in the present structure without data interpolation.Thus,such disadvantages as low instantaneous dynamic range of wideband monobit receiver and frequency resolution limitation of channelized receiver can be avoided.The simulation results indicate that the proposed scheme can improve the frequency resolution of channelized receiver.The hardware realizing efficiency is high,the computing complexity is low,and the instantaneous dynamic range is dependent on the filter shape,which can meet the real-time requirement of electronic war.
出处
《沈阳工业大学学报》
EI
CAS
2010年第2期212-216,共5页
Journal of Shenyang University of Technology
基金
国防预研基金资助项目
关键词
宽带接收
短时傅里叶变换
数字信道化接收机
加权叠接相加结构
单比特接收机
频率分辨率
高效结构
实时性
wideband receiving
short-term Fourier transform
digital channelized receiver
weighted overlap-add structure
monobit receiver
frequency resolution
efficient structure
real-time performance
