A wireless communication signal transmission system and method based on adaptive modulation

By extracting the likelihood ratio at the receiver and monitoring the queue depth, and dynamically adjusting the sliding integral register and modulation order, the feedback lag problem of the adaptive modulation and coding architecture in industrial scenarios is solved, thereby improving the throughput and stability of the wireless communication system.

CN122179284BActive Publication Date: 2026-07-24HUNAN PROVINCE KANGPU COMM EQUIP CO LTD
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Patent Information

Application Number
CN202610644553.3
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2026-05-12
Publication Date
2026-07-24
Estimated Expiration
2046-05-12

AI Technical Summary

Technical Problem

In industrial scenarios, existing adaptive modulation and coding architectures suffer from high overhead in feedback mechanisms and channel physical characteristic offsets, leading to lag and failure of modulation strategies. This makes them unable to effectively cope with sudden interference and dynamic service flows, resulting in buffer overflows and packet loss.

Method used

Signal characteristics are obtained by the likelihood ratio extraction module at the receiver. Combined with the queue depth of the medium access control layer, the accumulation period and modulation order of the sliding integral register are dynamically adjusted. The constellation mapping module is used to optimize signal transmission, replace the explicit feedback mechanism, and realize cross-layer correlation and nonlinear modulation switching.

Benefits of technology

It reduces the protocol overhead of digital baseband processing, improves the throughput and message delivery stability of the communication system, avoids buffer overflow and packet loss caused by blind modulation downgrading, and enhances the reliability of the system under complex interference conditions.

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Abstract

The application relates to the technical field of wireless communication, and discloses a wireless communication signal transmission system and method based on adaptive modulation, which comprises a likelihood ratio extraction module, a queue monitoring module, a parameter adaptive control module and a constellation mapping module; the likelihood ratio extraction module acquires a log-likelihood ratio sequence; the queue monitoring module determines a buffer queue depth; the parameter adaptive control module adjusts a sliding integral register accumulation period according to the buffer queue depth, and uses the sliding integral register to implement time domain integral processing on the log-likelihood ratio sequence to generate a channel quality representation parameter, and then determines a target modulation order; the application cross-layer correlates the data backlog level with the baseband statistical time scale, reduces the dependence on explicit channel state information feedback, reduces control signaling overhead, smoothes transient impulse noise interference through a dynamic accumulation mechanism, prevents buffer overflow, and improves the transmission net throughput rate of digital information in a high concurrency environment.
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