Channel state measurement method, device and user terminal

A channel state and measurement method technology, applied in wireless communication, digital transmission system, electrical components, etc., can solve problems such as inability to guarantee CQI information, large errors, LTE system throughput loss, etc., to achieve accurate measurement, prevent excessive correction, The effect of improving measurement accuracy

Active Publication Date: 2018-01-26
SPREADTRUM COMM (SHANGHAI) CO LTD
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Problems solved by technology

In the actual complex and changeable wireless environment, there will still be large errors in many cases
Therefore, a single fixed correction value obtained through prior simulation cannot guarantee that the CQI information obtained by the base station can meet the decoding requirements of 10% Block Error Rate (Block Error, BLER), and cannot maximize the use of the transmission capacity of the wireless channel. throughput loss

Method used

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  • Channel state measurement method, device and user terminal
  • Channel state measurement method, device and user terminal
  • Channel state measurement method, device and user terminal

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Embodiment Construction

[0048] Due to the complexity of the wireless channel and the diversity of channel coding methods, there is a certain error between the obtained average MI and the equivalent MI of the AWGN channel. In the prior art solution, the error is usually corrected by using a fixed correction value obtained by simulation. However, in some extreme cases, using a fixed correction value to correct the average MI still has a large error, which cannot meet the decoding requirement of 10% BLER, so that the transmission capacity of the wireless channel cannot be utilized to the maximum extent, resulting in the throughput of the LTE system. amount of loss.

[0049] In the embodiment of the present invention, the CRC statistics are performed on the decoding results of the data blocks transmitted by the PDSCH, and the average MI is correspondingly corrected according to the results of the CRC statistics, and the corresponding CQI information is selected by using the corrected average MI, and the ...

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Abstract

A channel state measurement method, device, and user terminal, wherein the channel state measurement method includes: calculating the average mutual information of subcarriers in the current transmission mode; calculating a total amount of correction, and combining the total amount of correction with the average mutual information The information is added to obtain the modified average mutual information; the channel state information including the channel quality indication information corresponding to the modified average mutual information is selected and sent to the base station. By adopting the channel state measurement method and device, the problem of channel quality indicator measurement accuracy can be effectively improved.

Description

technical field [0001] The present invention relates to the technical field of mobile communication, in particular to a channel state measurement method, device and user terminal. Background technique [0002] Long Term Evolution (LTE) is the long-term evolution of the general mobile communication system technology led by the 3rd Generation Partnership Project (3GPP), and is currently a widely recognized wireless communication technology. [0003] Since the transmission channel of wireless communication is a channel with multipath fading and time-varying, the channel state information (ChannelState Information, CSI) will change constantly. In order for the LTE system to obtain the maximum system capacity in the wireless channel environment, the base station needs to select an appropriate modulation and coding method and sub-band resources according to the wireless channel environment of each mobile terminal. The mobile terminal needs to detect the CSI of the wireless channe...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L1/00H04L25/02H04W72/08
Inventor 董宇周秦英沈旭强董霄剑
Owner SPREADTRUM COMM (SHANGHAI) CO LTD
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