Wireless Amplitude Modulation for Low-Complexity Receivers
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Solution Overview
Problem
In the New Radio (NR) system, receivers with extremely low power and complexity face challenges in demodulating signals carrying information through signal amplitude due to insufficient modulation depth between high and low levels, which affects detection performance.
Innovation Solution
Optimizing the modulation mode and/or constellation point associated with subcarriers carrying high-level and low-level signals in the target signal to meet demodulation requirements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If a receiver with extremely low power and complexity is used to receive signals carrying information through signal amplitude, then power consumption and device complexity are reduced, but demodulation accuracy deteriorates due to insufficient modulation depth
Solution Approach 1:
The patent changes the modulation parameters by optimizing the modulation mode (e.g., using OOK, ASK, or other amplitude modulation schemes) and adjusting constellation points to ensure sufficient modulation depth between high and low levels. This allows the receiver to maintain low power consumption while achieving adequate demodulation accuracy through improved signal differentiation.
2Device complexity
If a receiver with extremely low power and complexity is used to receive signals carrying information through signal amplitude, then device complexity is reduced, but demodulation accuracy deteriorates due to insufficient modulation depth
Solution Approach 1:
The patent optimizes modulation parameters including the choice of modulation mode (OOK, ASK, etc.) and constellation point configuration to achieve sufficient modulation depth. This enables simple, low-complexity receivers to accurately demodulate signals by ensuring clear distinction between high and low signal levels without requiring complex receiver architectures.
3Device complexity
If conventional modulation modes are used without optimization, then device complexity is kept low, but detection performance deteriorates due to insufficient modulation depth
Solution Approach 1:
The patent optimizes modulation parameters such as selecting appropriate modulation modes (OOK, ASK, etc.) and configuring constellation points to ensure sufficient modulation depth between high and low signal levels. This improvement in detection performance and reliability is achieved through parameter optimization rather than increasing system complexity.
Data Source
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AI summary
Provided in the embodiments of the present application are a wireless communication method and device. The present application optimizes modulation schemes and/or constellation points associated with subcarriers that carry a high-level signal and a low-level signal in a target signal, so that a modulation depth between the high-level signal and the low-level signal in the target signal meets a demodulation requirement, thereby improving the detection performance of the target signal. The wireless communication method comprises: a first communication device receiving a target signal, wherein the target signal is a signal carrying information by means of a signal amplitude, the target signal comprises a first signal and a second signal, the first signal is at a first level, the second signal is at a second level, and the first level is higher than the second level; and wherein a subcarrier carrying the first signal is associated with a first modulation scheme and/or a first constellation point, and a subcarrier carrying the second signal is associated with a second modulation scheme and/or a second constellation point, or the subcarrier carrying the second signal is a null subcarrier.