| WOLA滤波器组信道化接收机技术 |
| |
| 引用本文： | 王洪,吕幼新,汪学刚.WOLA滤波器组信道化接收机技术[J].电子科技大学学报(社会科学版),2008(1). |
| |
| 作者姓名： | 王洪 吕幼新 汪学刚 |
| |
| 作者单位： | 电子科技大学电子工程学院 成都610054 |
| |
| 摘 要： | 多相DFT滤波器组是实现信道化接收机的一种高效结构,但是该结构要求信道数目与抽取倍数必须相等,限制了接收机参数设计的灵活性。该文将WOLA滤波器组引入信道化接收机,以信号的平移代替窗函数的平移,对加权、叠接、相加后的信号进行DFT变换,实现了多相DFT滤波器组的相同功能,又解除了抽取倍数与信道数目的约束关系,是多相DFT滤波器组的一种推广形式。仿真结果验证了WOLA滤波器组在实现信道化接收机时的有效性。
|
| 关 键 词： | 信道化接收机 多相DFT滤波器组 短时傅里叶变换 WOLA滤波器组 |
Channelized Receiver with WOLA Filterbanks |
| |
| Abstract: | Polyphase discrete Fourier transform(PDFT) filterbank is an efficient structure for channelized receiver,but its flexibility is limited by the fixed relationship between decimating factor and channel number.In this paper,a flexible and efficient channelized receiver structure is proposed with weighted overlap-add filterbanks.The shift of window is replaced by the shift of input signals.DFT is employed after weighting,overlapping,and adding.The structure gets rid of the fixed relationship in PDFT structure,but realizes same functions.So the proposed structure is a generalized form of PDFT structures.The simulation results show the effectiveness of the new structures. |
| |
| Keywords: | channelized receiver polyphase DFT filterbanks short-time Fourier transform weighted overlap-add filterbanks |
| 本文献已被 CNKI 等数据库收录！ |
|
