Multi-Channel Signal Transmission via High-Order Modulation
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Solution Overview
Problem
Current 802.11ad wireless standards for high-definition audio and video transmission in the 60 GHz frequency band only utilize one channel at a time, limiting diversity gain and transmission efficiency due to the inability to flexibly implement diversity transmission across multiple channels.
Innovation Solution
A method and apparatus that combine low-order modulated signals into high-order modulated signals and transmit them on multiple subcarriers across multiple channels, utilizing a channel matrix to determine the high-order signals and distribute them across subcarriers and subbands, thereby enhancing diversity gain.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If only one channel is used to transmit a signal in 802.11ad, then the system complexity is reduced, but the diversity gain effect is not remarkable and transmission efficiency is limited
Solution Approach 1:
The patent combines multiple channels (first channel and second channel) to transmit multiple high-order modulated signals simultaneously. By merging the resources of multiple channels, the system achieves both diversity gain through multi-channel transmission and improved transmission efficiency through parallel signal transmission, resolving the contradiction between reliability and productivity.
Solution Approach 2:
The patent transitions from single-channel transmission to multi-channel transmission by adding the dimension of channel diversity. This dimensional expansion allows the system to achieve diversity gain while simultaneously improving transmission efficiency through parallel transmission across multiple channels, effectively resolving the trade-off between reliability and productivity.
2Reliability
If multiple channels are used for signal transmission, then diversity gain is improved, but the device complexity increases
Solution Approach 1:
The patent employs a universal channel matrix Q that can be applied across multiple channels to transform low-order modulated signals into high-order modulated signals. This multi-functional approach allows the same processing methodology to be used across different channels, achieving diversity gain while managing system complexity through standardized processing procedures.
Solution Approach 2:
The patent changes the modulation order parameter by transforming low-order modulated signals into high-order modulated signals through the channel matrix Q. This parameter transformation enables efficient use of multiple channels for diversity transmission, improving reliability while keeping the complexity manageable through mathematical signal transformation rather than complex hardware modifications.
3Productivity
If low-order modulated signals are combined into high-order modulated signals, then transmission efficiency is improved, but the signal robustness may be reduced
Solution Approach 1:
The patent merges multiple low-order modulated signals through the channel matrix Q to create high-order modulated signals that are transmitted across multiple channels. This combining approach achieves both improved transmission efficiency through higher-order modulation and maintained signal robustness through multi-channel diversity transmission, where the combined effect of multiple channels compensates for the reduced robustness of individual high-order modulated signals.
Data Source
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AI summary
This application discloses a signal transmission method and apparatus. The method includes: combining a plurality of low-order modulated signals into N high-order modulated signals; and transmitting the N high-order modulated signals on N subcarriers, where the N subcarriers are subcarriers on frequency domain resources of M channels, an nth high-order modulated signal in the N high-order modulated signals is transmitted on an nth subcarrier in the N subcarriers, N is an integer greater than or equal to 2, M is an integer greater than or equal to 2, and n = 1, 2, ..., N. The signal transmission method and apparatus in embodiments of this application can improve efficiency of a diversity gain.