Method and system for processing signals

A technology for processing signals and wireless signals, applied in the field of signal processing, can solve problems such as lack of physical layer feedback

Active Publication Date: 2009-09-16
AVAGO TECH INT SALES PTE LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

FACH usually operates independently, usually at a fairly high power level (power level)...

Method used

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  • Method and system for processing signals
  • Method and system for processing signals
  • Method and system for processing signals

Examples

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Embodiment Construction

[0042]The present invention relates to methods and systems for Adaptive Automatic Gain Control (AGC) references for HSDPA and WCDMA. Aspects of the present invention may implement an RF receiver that includes an RF front end to receive a transmission signal including a pilot signal through WCDMA or HSDPA. The operating mode of the RF front end of the RF receiver may be determined based on received signal components, such as HS-PDCH, HS-SCCH and / or CPICH. Received signal strength information (RSSI) of the received signal can be determined from the output of the ADC. Actual received signal strength information, which may be indicated by received signal code strength (RSCP), may be determined based on pilot symbols on the CPICH. The determined operating mode for the RF front end of the RF receiver, the determined RSSI and the determined CPICH_RSCP may be provided as inputs to an Adaptive Gain Control (AGC) loop or circuit in the receiver front end. An AGC loop or circuit can be...

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Abstract

This invention relates a method and a system for processing signals and for an adaptive automatic gain control (AGC) reference of HSDPA and WCDMA, A RF receiver, comprising a RF front-end, may receive a signal comprising a pilot signal via WCDMA or HSDPA. The operation mode of the RF front-end of the RF receiver may be determined based on the received signal components such as a HS-PDCH, a HS-SCCH, and/or a CPICH. The received signal strength information (RSSI) of the received signal may be determined from the output of a matched filter within the RF receiver. A true RSSI, which may be indicated by the received signal code power (RSCP), may be determined based on the pilot symbols over the CPICH. The operation mode determined for the receiver's RF front-end, the determined RSSI, and the determined CPICH_RSCP, may be provided as inputs to an automatic-gain-control (AGC) loop or circuit within the receiver front-end.

Description

technical field [0001] The present invention relates to signal processing for communication systems, and more particularly to methods and systems for adaptive automatic gain control (AGC) references for HSDPA and WCDMA. Background technique [0002] Wideband Code Division Multiple Access (WCDMA) is a technology used in a third generation (Third Generation, 3G) wireless communication system based on and developed from Code Division Multiple Access (Code Division Multiple Access). WCDMA continues to evolve toward higher data rates and IP-based packet-switched services. High Speed ​​Downlink Packet Access (HSDPA) technology provides enhanced performance for WCDMA by increasing downlink packet data throughput through a combination of fast physical layer (L1) retransmission and Base Transceiver Station, referred to as BTS)) for fast link adaptive control. [0003] In WCDMA, three transport channels, Dedicated Channel (DCH), Downlink Shared Channel (DSCH) and Forward Channel (FA...

Claims

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Application Information

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IPC IPC(8): H04W52/52H04B1/10H04B1/707
CPCH03G3/3052H04J13/0044H03G3/005
Inventor 苌立枫纳尔逊·索伦伯格阿布希拉瓦·普拉萨德
Owner AVAGO TECH INT SALES PTE LTD
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