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An interface/signal ratio estimation method and device in communication system

A communication system and channel estimation technology, applied in the field of signal-to-interference ratio estimation in TD-SCDMA system, can solve the problem that the SIR value cannot be obtained, the accuracy of channel quality indication affecting the effect of closed-loop power control, and the SIR estimation method cannot be obtained accurately Interfering signal code power and other issues, to achieve the effect of accurate signal-to-interference ratio and accurate average noise power

Inactive Publication Date: 2010-03-24
ST ERICSSON SEMICON BEIJING
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Problems solved by technology

[0006] The purpose of the present invention is to provide a method and device for estimating the signal-to-interference ratio in a communication system, so as to solve the problem that the existing SIR estimation method cannot accurately obtain the interference signal code power, thereby failing to obtain the correct SIR value, so that the closed-loop power control is seriously affected Technical Issues with Effects and Accuracy of Channel Quality Indications

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  • An interface/signal ratio estimation method and device in communication system
  • An interface/signal ratio estimation method and device in communication system
  • An interface/signal ratio estimation method and device in communication system

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[0034] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0035] The method of the present invention utilizes the multi-cell channel estimation result after interference elimination, first obtains the effective path information of the multi-cell through noise reduction processing, then obtains the channel impulse response after the multi-cell activation through the window activation detection, and secondly obtains the channel impulse response after the activation of the serving cell. The channel impulse response obtains the received signal code power, and then uses the channel estimation result after multi-cell activation and the channel estimation result after multi-cell interference cancellation to obtain the interference signal code power (Interference), and finally compares RSCP with Interference to obta...

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Abstract

The method comprises: making the channel estimation and disturbance elimination for the received intermediate data to get the channel pulse response; making the noise reduction for the channel pulse response to the valid.

Description

technical field [0001] The present invention relates to the field of wireless communication systems, in particular to a method and device for estimating signal-to-interference ratio in TD-SCDMA system. Background technique [0002] According to the definition of SIR in 3GPP TS25.225 protocol, the estimation method of SIR (Signal to Interference Ratio, SIR) in TD-SCDMA (Time Division Synchronous Code Division Multiple Access) system is: [0003] SIR = RSCP Interference × SF [0004] Among them, SF represents the spreading factor, RSCP represents the received signal code power of a specific DPCH (Dedicated Physical Channel) and PDSCH (Physical Downlink Shared Channel), and Interference represents the interference that cannot be eliminated by the receiver in the received signal in the same time slot. [0005] According to the definition of the standard, there are several different implementa...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04Q7/38H04L25/03H04L25/02H04W52/24
Inventor 刘俊英
Owner ST ERICSSON SEMICON BEIJING
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