Channel adaptive device and channel adaptive method

An adaptive, channel technology, applied in the direction of selection device, communication between multiple stations, radio/induction link selection arrangement, etc., can solve problems such as channel fading, improve throughput, reduce the number of retransmissions and data The effect of transmission delay and small block error rate

Inactive Publication Date: 2007-06-06
HUAWEI TECH CO LTD
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  • Abstract
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Problems solved by technology

[0014] The technical problem to be solved by the present invention is to reduce the time delay in the channel adaptive scheme and improve the throughput, so as to overcome the defects caused by the time delay of CQI feedback and channel fading in the prior art

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  • Channel adaptive device and channel adaptive method
  • Channel adaptive device and channel adaptive method

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Embodiment Construction

[0041] In order to overcome the mismatch between CQI and actual channel quality caused by the time-varying characteristics of mobile channels and channel measurement feedback delay, embodiments of the present invention provide a channel adaptation device and a channel adaptation method, which will be described respectively below.

[0042] Referring to FIG. 1 , it is a system block diagram of Embodiment 1 of the channel adaptation device provided by the present invention, including a correction parameter setting module 1 for setting correction parameters; a CQI adjustment module 2 connected to the correction parameter setting module 1, It is used to call the correction parameter to adjust the CQI data.

[0043] Wherein, the correction parameter setting module 1 can also include a man-machine interface (not shown in the figure), and the actual setting of the correction parameters is performed by the end user or the administrator; or, the correction parameters in the correction pa...

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Abstract

An adapting method of channel includes carrying out estimation on state of current channel by user terminal for obtaining CQI data, adjusting CQI data according to preset revision parameter and sending adjusted CQI data to base station, selecting modulation coding mode by base station according to adjusted CQI data and send data to user end. The device used for realizing said method and another adapting method of channel are also disclosed.

Description

technical field [0001] The invention belongs to the field of mobile communication, and in particular relates to a channel adaptive device and a channel adaptive method. Background technique [0002] When transmitting data on a wireless channel, due to the unsatisfactory channel transmission characteristics and the influence of additive noise, mistransmission and missing digital signals will inevitably occur between the sending end and the receiving end, and digital transmission errors will occur. The ratio of the signal to the total digital signal transmitted, known as the bit error rate, is used as a measure of the quality of data transmission. In the case of a certain signal-to-noise ratio, it is necessary to design the baseband signal, select the mode of modulation and demodulation, and use techniques such as time domain and frequency domain equalization to reduce the bit error rate as much as possible, so as to meet the quality of data transmission. If the above measure...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04Q7/38H04L1/00H04B7/26H04L1/16H04L1/18
Inventor 刘晟余荣道李琦
Owner HUAWEI TECH CO LTD
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