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Adaptive filter for transmit leakage signal rejection

A technology for leaking signals and signals, applied in electrical components, transmission systems, etc., can solve problems such as increasing the cost of wireless devices

Active Publication Date: 2007-11-21
QUALCOMM INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Third, the SAW filter and its impedance matching circuit increase the cost of the wireless device

Method used

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  • Adaptive filter for transmit leakage signal rejection
  • Adaptive filter for transmit leakage signal rejection
  • Adaptive filter for transmit leakage signal rejection

Examples

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Embodiment Construction

[0021] The word "exemplary" is used herein to mean "serving as an example, instance, or illustration." Any embodiment or design described herein as "exemplary" is not necessarily to be construed as preferred or advantageous over other embodiments or designs.

[0022] The adaptive filter described herein can be used in various wireless full-duplex communication systems. These adaptive filters are also available in various frequency bands such as cellular from 824 to 894MHz, personal communication systems (PCS) from 1850 to 1990MHz, digital cellular systems (DCS) from 1710 to 1880MHz, 2170MHz International Mobile Telecommunications 2000 (IMT-2000) frequency band and so on. For clarity, the following description is for cellular frequency bands, which include (1) the uplink frequency band from 824 to 849 MHz and (2) the downlink frequency band from 869 to 894 MHz. The uplink and downlink frequency bands are the transmit (TX) and receive (RX) frequency bands of the wireless devic...

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PUM

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Abstract

Electrical connectors capable of being mounted on circuit substrates by BGA techniques are disclosed. Also, disclosed is a method of manufacturing such connectors. There is at least one recess on the exterior side of the connector elements. A conductive contact extends from adjacent the interior side into the recess on the exterior side of the housing. A controlled volume of solder paste is introduced into the recess. A fusible conductive element, in the form of solder balls is positioned in the recess. The connector is subjected to a reflow process to fuse the solder ball to the portions of the contact extending into said recess. Contacts are secured in the insulative housing of the connector by deformable sections that minimize stress imposed on the central portions of the contacts to promote uniformity of solder volume.

Description

[0001] This application claims priority to U.S. Provisional Application No. 60 / 519,561, filed November 13, 2003, and assigned to the assignee of the present invention, entitled "ADAPTIVE FILTERING OF TX LEAKAGE IN CDMA RECEIVERS," which The case is hereby incorporated by reference in its entirety for all purposes. technical field [0002] The present invention relates generally to electronic components, and more particularly to techniques for mitigating the deleterious effects of transmit (TX) leakage signals in wireless full-duplex communication systems. Background technique [0003] Wireless devices in a wireless full-duplex communication system can simultaneously transmit and receive data for two-way communication. One such full-duplex system is a Code Division Multiple Access (CDMA) system. On the transmit path, a transmitter within a wireless device (1) modulates data onto a radio frequency (RF) carrier signal to produce an RF modulated signal, and (2) amplifies the RF...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B1/52
CPCH04B1/525
Inventor 弗拉迪米尔·阿帕林加里·约翰·巴兰坦查理·J·珀西科
Owner QUALCOMM INC
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