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Self-adaptive path searcher in CDMA receiver

A receiver and path technology, applied in the field of path searchers, can solve the problem of not considering the distribution map and its attributes, etc.

Inactive Publication Date: 2006-08-30
NVIDIA CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This method does not consider the entire distribution graph and its properties

Method used

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  • Self-adaptive path searcher in CDMA receiver
  • Self-adaptive path searcher in CDMA receiver

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Embodiment Construction

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Abstract

Path selection method in a CDMA receiver for the selection of the true path of a transmission channel, comprising the step of comparing the profile energy with a threshold, characterized in that the threshold is dynamically determined as a function of the mean of noise and interference paths derived from the transmission channel profile estimation.

Description

technical field The present invention relates to a path searcher for a RAKE receiver. Background technique In mobile radio systems, the transmitted signal may follow different paths to the receiver due to reflections from obstacles. This phenomenon generates interference between multipath channels and a large number of multipaths with different delays. Therefore the received signal may fade selectively at certain frequencies. In a Code Division Multiple Access (CDMA) receiver, the relative path / delay of the transmission channel needs to be selected in order to perform channel estimation and data detection in the presence of noise and interference. The RAKE receiver must coherently combine the different estimation paths of the channel. Due to noise, interference, and Doppler spread, some paths may be selected that do not exist in the actual channel impulse response (CIR). Therefore, the receiver has to select the true channel path of the transmission channel from all de...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B1/707
CPCH04B1/7113H04B1/7115
Inventor 埃利·本詹尼琼-弗兰科斯·鲍奎尔贝努瓦·德卡奎雷
Owner NVIDIA CORP