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Architecture to reject near end blockers and transmit leakage

A technology for transmitting signals and paths, applied to networks using active components, impedance networks, multi-terminal pairs networks, etc., can solve the problem of low effectiveness

Inactive Publication Date: 2017-03-22
QUALCOMM INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Ordinary filtering techniques such as RC filtering are less effective because the rejection is only a few dB

Method used

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  • Architecture to reject near end blockers and transmit leakage
  • Architecture to reject near end blockers and transmit leakage
  • Architecture to reject near end blockers and transmit leakage

Examples

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Embodiment Construction

[0021] The detailed description set forth below with reference to the accompanying drawings is intended as an illustration of exemplary embodiments of the present invention and is not intended to merely represent an embodiment in which the present invention can be implemented. The term "exemplary" used throughout this specification means "serving as an example, instance, or illustration" and should not necessarily be constructed as a preferred or advantageous embodiment over other exemplary embodiments. It is obvious to those skilled in the art that the exemplary embodiments of the present invention may be implemented without using these specific details. In some cases, widely known structures and devices are shown in block diagram form in order to avoid simulating the innovativeness of the exemplary embodiments shown here.

[0022] As used in this application, the terms "component", "module", "system", etc. are intended to refer to computer-related entities, or hardware, firmwar...

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Abstract

A method and apparatus for minimizing transmit signal interference is provided. The method includes the steps of: receiving a signal and amplifying the received signal. The received signal is then mixed with an intermediate frequency signal to obtain a baseband modulated signal. The baseband modulated signal is first filtered in an RC filter. The resulting signal is then divided by a preselected amount and the first divided portion is sent to a main path of a biquad filter, which produces a first stage biquad filtered signal. The second portion of the divided signal is sent to an auxiliary path of the biquad filter, and produces a second filtered signal. The first and second signals are then recombined and sent to the second stage of the biquad filter, where further filtering takes place.

Description

[0001] Cross references to related applications [0002] This application claims the priority and rights of non-transient application No. 14 / 331,685 filed with the U.S. Patent Office on July 15, 2014, which is hereby incorporated by reference in its entirety. Technical field [0003] The present disclosure relates generally to wireless communication systems, and more specifically to a method for rejecting near-end blockers and transmission leakage in a receiver module. Background technique [0004] Wireless communication systems have become smaller and more powerful and capable. An increasing number of users rely on wireless communication devices for mobile phone use as well as e-mail and Internet access. At the same time, the device has become smaller in size. Devices such as cellular phones, personal digital assistants (PDAs), laptop computers, and other similar devices provide reliable services with extended coverage areas. These devices can be referred to as mobile stations, ...

Claims

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Application Information

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IPC IPC(8): H03H11/04H03H11/12H04B1/10H04B1/52
CPCH03H11/0433H03H11/1252H04B1/109H04B1/525
Inventor M·B·瓦希德法尔C-H·王J·A·里士满T·C·阮A·科米加尼Y·拉亚维A·科哈利利
Owner QUALCOMM INC
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