Method for improving IP2 index of zero intermediate frequency and low intermediate frequency architecture receiver and architecture thereof

A low-IF and zero-IF technology, applied in a method of improving the IP2 index of zero-IF and low-IF architecture receivers and its architecture field, can solve problems affecting system sensitivity, etc., and achieve easy promotion and application, low difficulty in implementation, and judgment accurate effect

Active Publication Date: 2021-10-12
HYTERA COMM CORP
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Problems solved by technology

[0004] This application provides a method and architecture for improving the IP2 index of zero-IF and low-IF architecture receivers, so as to solve the technical problem of directly adding and turning on the attenuator in the architecture and affecting the system sensitivity

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  • Method for improving IP2 index of zero intermediate frequency and low intermediate frequency architecture receiver and architecture thereof
  • Method for improving IP2 index of zero intermediate frequency and low intermediate frequency architecture receiver and architecture thereof
  • Method for improving IP2 index of zero intermediate frequency and low intermediate frequency architecture receiver and architecture thereof

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[0022] The following will clearly and completely describe the technical solutions in the embodiments of the present application with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of them. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of this application.

[0023] see figure 1 , figure 1 It is a schematic flowchart of an embodiment of the method for improving the IP2 index of zero-IF and low-IF architecture receivers according to the present application.

[0024] An embodiment of the present application provides a method for improving the IP2 index of zero-IF and low-IF architecture receivers, including the following steps:

[0025] S101: Using a digital signal processing algorithm to detect whethe...

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Abstract

The invention discloses a method for improving an IP2 index of a zero intermediate frequency and low intermediate frequency architecture receiver and architecture thereof. The method for improving the IP2 index of the zero intermediate frequency and low intermediate frequency architecture receiver comprises the steps: detecting whether there is an interference signal outside a baseband or not through a digital signal processing algorithm; in response to the interference signal existing outside the base band, judging whether the intensity of the interference signal outside the base band is greater than a preset value or not; and in response to the situation that the intensity of the interference signal outside the baseband is greater than a preset value, controlling the gain of a radio frequency front end so as to suppress the interference signal. The intensity of the interference signal outside the baseband is judged to be greater than the preset value through the digital signal processing algorithm, that is, the radio frequency front end gain is controlled to suppress the interference signal when the interference signal is relatively strong, and the sensitivity of the receiver architecture is not influenced under the normal condition of no interference or small interference. In addition, the method is low in energy consumption, low in implementation difficulty, free of hardware cost increase and easier to popularize and apply.

Description

technical field [0001] The present application belongs to the technical field of receiver architecture, and specifically relates to a method and architecture for improving the IP2 index of zero-IF and low-IF architecture receivers. Background technique [0002] In modern receivers, zero-IF and low-IF architectures have many advantages, such as high integration, low cost, and simpler circuit structures. Even so, it still has some serious problems. Among them, the poor anti-interference ability is a major factor hindering the large-scale application of such architecture receivers. External interference is divided into monotone interference (causing Blocking problems) and multi-tone interference (causing IP2, IP3 and other problems). The most serious problem comes from two-tone interference, which will generate low-frequency interference signals at baseband due to the inherent structure of zero-IF and low-IF receivers. [0003] In the prior art, an attenuator is added before...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B1/10
CPCH04B1/10H04B1/1027Y02D30/70
Inventor 王冠何大武黄妮陈明辉高存浩
Owner HYTERA COMM CORP
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