Self-adaptive code modulating method

A technology of adaptive coding and modulation method, applied in the direction of digital transmission system, error prevention, electrical components, etc., can solve the problem of inability to erroneous frame immunity, inability to determine the size of the threshold adjustment value, etc., to achieve the effect of reducing sensitivity
CN1790966AInactive Publication Date: 2006-06-21ZTE CORP
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
ZTE CORP
Publication Date
2006-06-21
Estimated Expiration
Not applicable · inactive patent

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Abstract

The modulation method for self-adaptive code comprises: determining initial MCS threshold by simulation tested SINR and MCS throughput on single-path quasi-stationary condition; detecting continuously the real-time SINR value; when SINR within prescribed range, detecting the CRC check result, if right, then defining new threshold of MCS equals to the old minus D; or else, defining new threshold of MCS equals to the old plus U; returning to detect real-time SINR value. This invention reduces the sensitivity to SINR as well as to FER variation, and obtains immunity function to common error frame and throughput gain.
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Description

technical field

[0001] The invention belongs to an adaptive coding and modulation method in a mobile communication system, in particular to a threshold adjustment method for adaptive coding and modulation. Background technique

[0002] The principle of the adaptive modulation and coding (Adaptive Modulate Coding: AMC) technology is to change the mode of modulation and code rate in real time according to the change of channel conditions. In a system using AMC technology, such as a High Speed ​​Downlink Packet Access (HSDPA) system, a mobile phone user in a favorable position, such as a mobile phone user close to a base station, can use high-order modulation for its corresponding downlink and high code rate (such as 16QAM, larger data block size, higher error correction code rate), and mobile phone users in unfavorable positions, such as mobile phone users far away from the base station, the corresponding downlink modulation order and The code rate is smaller (for example, QP...

Claims

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