Digital receivers and transmitters using polyphase filter banks for wireless communications
Digital receivers and transmitters using polyphase filter banks for wireless communications
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DOI：
10.1109/tmtt.2003.809176
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发表时间：
2003-04
影响因子：
4.3
通讯作者：
F. Harris;C. Dick;M. Rice
中科院分区：
文献类型：
--
作者：
F. Harris;C. Dick;M. Rice
提供多信道无线数字接收机的教程概述以及信道带宽、信道分离和信道采样率之间的关系。概览充分利用数字来支持基础数学。多通道数字接收机同时向下转换驻留在单个采样数据信号流中的一组频分多路（FDM）通道。以类似的方式，多通道数字发射机同时对多个基带信号进行上转换，以在单个采样数据信号流中组装一组FDM信道。多相滤波器组已成为有效完成这些任务的首选架构。该体系结构使用三个相互作用的过程来组装或拆卸信道化信号集。在接收器中，这些过程是一个输入换向器，用于由于采样率降低而实现频谱折叠或混叠，一个多相m路滤波器用于在每个路径中对分割和重采样的时间序列进行时间对齐，以及一个离散傅里叶变换用于相位对齐和分离多个基带混叠。在发射机中，这些相同的过程以相关的方式操作，将基带信号混叠到高阶奈奎斯特区，同时使用输出换向器增加采样率。
Provides a tutorial overview of multichannel wireless digital receivers and the relationships between channel bandwidth, channel separation, and channel sample rate. The overview makes liberal use of figures to support the underlying mathematics. A multichannel digital receiver simultaneously down-converts a set of frequency-division-multiplexed (FDM) channels residing in a single sampled data signal stream. In a similar way, a multichannel digital transmitter simultaneously up-converts a number of baseband signals to assemble a set of FDM channels in a single sampled data signal stream. The polyphase filter bank has become the architecture of choice to efficiently accomplish these tasks. This architecture uses three interacting processes to assemble or to disassemble the channelized signal set. In a receiver, these processes are an input commutator to effect spectral folding or aliasing due to a reduction in sample rate, a polyphase M-path filter to time align the partitioned and resampled time series in each path, and a discrete Fourier transform to phase align and separate the multiple baseband aliases. In a transmitter, these same processes operate in a related manner to alias baseband signals to high order Nyquist zones while increasing the sample rate with the output commutator.