Diversity receiver for wireless communication

A receiver and diversity antenna technology, applied in the field of electronic devices, can solve problems such as performance impact

Active Publication Date: 2008-12-17
QUALCOMM INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, whenever a receiver experiences unwanted path effects, its performance suffers
This degradation in performance is undesirable

Method used

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  • Diversity receiver for wireless communication
  • Diversity receiver for wireless communication
  • Diversity receiver for wireless communication

Examples

Experimental program
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Embodiment Construction

[0020] The diversity receivers described herein can be used in various wireless communication systems, eg, CDMA systems, TDMA systems, Frequency Division Multiple Access (FDMA) systems, Orthogonal FDMA (OFDMA) systems, and so on. A CDMA system may implement a radio technology such as W-CDMA, cdma2000, and so on. cdma2000 covers IS-2000, 1S-856 and IS-95 standards. IS-2000 and IS-95 are commonly referred to as CDMA2000 1x, or "1x" for short. A TDMA system may implement a radio technology such as GSM, Digital Advanced Mobile Phone System (D-AMPS), and so on. D-AMPS covers IS-136 and IS-54. The various radio technologies and standards are well known to those skilled in the art. W-CDMA and GSM are described in documents promulgated by an organization named "3rd Generation Partnership Project" (3GPP). cdma2000 is described in a document promulgated by an organization named "3rd Generation Partnership Project 2" (3GPP2). 3GPP and 3GPP2 documents are publicly available.

[0021...

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Abstract

A diversity receiver capable of receiving a CDMA system (e.g., a W-CDMA system) and a TDMA system (e.g., a GSM system), with receive diversity for at least one system, is described. W-CDMA is often referred to as UMTS. In one design, the diversity receiver includes a first receiver for GSM and a second receiver for UMTS. The first receiver may be implemented with one receiver design, may be spec-compliant for GSM, and may also support UMTS. The second receiver may be implemented with another receiver design, may be spec-compliant for UMTS, and may also support GSM. The first receiver may include a lowpass filter having a bandwidth that is adjustable for GSM and UMTS. The second receiver may include a bandpass filter used to attenuate a transmit frequency range for UMTS. Each receiver may include circuit blocks that are used for both GSM and UMTS.

Description

[0001] Related Application Cross Reference [0002] This application claims the title of "A COMBINED ARHITECTURE FOR UMTS ANDGSM / EDGE DRIVERS RECEPTION" filed on October 19, 2005 with the serial number 60 / 728,079 The rights in the United States Provisional Application are assigned to the assignee of the present application and the entire contents of which are hereby incorporated by reference for all purposes. technical field [0003] The present invention relates generally to electronic devices, and more particularly to diversity receivers for wireless communications. Background technique [0004] In wireless communication systems, a transmitter modulates data on a radio frequency (RF) carrier signal to produce an RF modulated signal more suitable for transmission. The transmitter then transmits the RF modulated signal to a receiver via a wireless channel. The transmitted signal may reach the receiver via one or more propagation paths (eg, line-of-sight and / or reflection ...

Claims

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Application Information

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IPC IPC(8): H04B1/40H04B7/08
CPCH04B1/006H04B7/0822H04B7/0825H04B7/0831H04B7/0871H04W88/06
Inventor 韦斯利·桑普森阿里斯托泰莱·哈吉克里托斯古尔坎瓦尔·S·萨霍塔
Owner QUALCOMM INC
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