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Signal processing apparatus and method for setting filtering characteristic of the same

A signal processing device and signal processing circuit technology, applied in the direction of electrical components, transmission systems, etc., can solve the problem of increased hardware cost and circuit board area, and achieve the effect of simple structure

Active Publication Date: 2011-09-21
MEDIATEK INC
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Problems solved by technology

For the problems caused by strong interfering signals, the most common solution is to apply a bandpass filter with a very high quality factor to the input of a wireless communication receiver, for example, a surface acoustic wave (SAW) Surface acoustic wave (SAW) filters can be used to provide the desired attenuation for OOB interference signals, however, the use of surface acoustic wave filters often results in a substantial increase in hardware cost and board area

Method used

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  • Signal processing apparatus and method for setting filtering characteristic of the same
  • Signal processing apparatus and method for setting filtering characteristic of the same
  • Signal processing apparatus and method for setting filtering characteristic of the same

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Embodiment Construction

[0018] Certain terms are used in the description and claims to refer to particular elements. Those skilled in the art should understand that hardware manufacturers may use different terms to refer to the same component. The specification and claims do not use the difference in name as a way to distinguish components, but use the difference in function of components as a criterion for distinguishing. "Includes" mentioned throughout the specification and claims is an open term, so it should be interpreted as "including but not limited to". In addition, the term "coupled" herein includes any direct and indirect means of electrical connection. Therefore, if it is described that the first device is coupled to the second device, it means that the first device may be directly electrically connected to the second device, or indirectly electrically connected to the second device through other devices or connection means.

[0019] see figure 1 , figure 1 is a schematic diagram of th...

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Abstract

The present invention provides a signal processing apparatus and a method for setting a filtering characteristic of the same. The method for setting the filtering characteristic of the signal processing apparatus comprises the following steps: configuring a first signal processing path; and configuring a second signal processing path. When an input signal received at the signal input port includes a first signal component with a first frequency and a second signal component with a second frequency, most of the first signal component is processed by the first signal processing path, and most of the second signal component is processed by the second signal processing path. The signal processing apparatus and the method for setting the filtering characteristic of the signal processing apparatus can effectively filter the unwanted signal component.

Description

technical field [0001] The present invention relates to filtering of a blocker signal, and in particular to a signal processing device comprising a frequency selective circuit having a mixer module to control the frequency response of the frequency selective circuit and related methods. Background technique [0002] Generally speaking, a wireless communication receiver needs to be able to detect weak signals in the desired frequency band. Furthermore, a wireless communication receiver needs to be able to detect strong out-of-band (OOB) signals (i.e. interference signal) to detect the in-band (in-band) signal. For the problems caused by strong interfering signals, the most common solution is to apply a bandpass filter with a very high quality factor to the input of a wireless communication receiver, for example, a surface acoustic wave (SAW) A surface acoustic wave (SAW) filter can be used to provide the desired attenuation for the OOB interference signal, however, the use ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B1/10H04B1/18
Inventor 蔡明达
Owner MEDIATEK INC
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