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m-way filter with external and internal channelizers for adjusting passband bandwidth

A signal filtering, polyphase filter technology, used in electrical components, transmission systems, digital technology networks, etc.

Active Publication Date: 2020-03-20
XILINX INC
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Furthermore, the passband of such component carriers may be larger or smaller than the sampling frequency fs divided by the number of component carriers M

Method used

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  • m-way filter with external and internal channelizers for adjusting passband bandwidth
  • m-way filter with external and internal channelizers for adjusting passband bandwidth
  • m-way filter with external and internal channelizers for adjusting passband bandwidth

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[0022] In the following description, numerous specific details are set forth in order to provide a more thorough description of specific embodiments described herein. However, one or more other embodiments and / or variations of these embodiments may be practiced by those skilled in the art without all of the specific details given below. In other instances, well-known features have not been described in detail so as not to obscure the description of the embodiments of the present application. For ease of illustration, the same numerical designations are used in the different figures to refer to the same parts; however, in alternative embodiments, these parts may be different.

[0023] Exemplary devices and / or methods are described herein. The word "exemplary" is used herein to mean "serving as an example, instance, or representation". Any example or feature described herein as "exemplary" is not necessarily to be construed as preferred or advantageous over other examples or f...

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Abstract

Disclosed is apparatus and method to filter a signal. In such an apparatus, an outer polyphase filter is configured for receiving an input signal and for channelizing the input signal into outer filtered samples. An outer Inverse Fourier Transform block is coupled to the outer polyphase filter and configured for transforming the outer filtered samples into a coarse multi-path output. An inner polyphase filter is coupled to a path of the coarse multi-path output for receiving information therefrom and configured for generating inner filtered samples of the information obtained from the path. The inner filtered samples are for moving an edge of a passband associated with the outer filtered samples toward a center of the passband.

Description

technical field [0001] The following description refers to integrated circuit devices ("ICs"). More specifically, the following description relates to an M-way filter with external and internal channelizers for adjusting the passband bandwidth suitable for ICs. Background technique [0002] Digital upconverters ("DUC") and digital downconverters ("DDC") are well known circuits for signal processing. Typically, the modulated digital input signal is up-converted before being input to the DUC's digital-to-analog converter ("DAC"), and typically the modulated analog input signal is input to the DDC's An analog-to-digital converter ("ADC") for subsequent digital down-conversion by the DDC. [0003] The overall bandwidth of a multicarrier signal is generally proportional to the sum of the total bandwidths of the component carriers of the multicarrier signal, ie the passband of the component carriers. Furthermore, the passband of such component carriers may be larger or smaller ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B1/00
CPCH04B1/001H04B1/005H03H17/0266
Inventor F·J·哈里斯C·H·迪克
Owner XILINX INC
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