High-Frequency Radio Pulse Shaping for EVM and ACLR Compliance
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Solution Overview
Problem
High-frequency wireless communication systems face challenges with limitations such as Error Vector Magnitude (EVM), Adjacent Carrier to Leakage Ratio (ACLR), and spectral mask, which are not adequately addressed by optimizing only the Peak to Average Power Ratio (PAPR).
Innovation Solution
Implementing pulse-shaping techniques based on a first pulse-shaping parameter beta to optimize transmission parameters like EVM, ACLR, and spectral mask, while maximizing output power, using methods like Nyquist filtering and periodic expansion in the frequency domain.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If pulse-shaping with beta parameter is optimized to maximize output power, then power back-off is minimized, but EVM and ACLR requirements may not be met
Solution Approach 1:
The patent applies parameter changes by optimizing the pulse-shaping beta parameter to specific values (0.25, 0.3, 0.35, 0.4, 0.45, or 0.5) depending on the subcarrier spacing configuration. This allows the system to maximize output power while meeting EVM and ACLR requirements by selecting the appropriate beta value for each numerical configuration.
Solution Approach 2:
The patent implements dynamics by making the beta parameter adaptive rather than fixed. The radio node determines the subcarrier spacing and selects the beta parameter dynamically based on the numerical configuration, allowing the pulse-shaping to adapt to different operating conditions and maintain optimal performance across various scenarios.
2Productivity
If higher frequencies are used to increase bandwidth, then communication capacity improves, but time domain behavior deteriorates
Solution Approach 1:
The patent addresses time domain behavior at high frequencies by changing the pulse-shaping beta parameter based on subcarrier spacing. This parameter adjustment compensates for the degraded time domain characteristics inherent in millimeter wave frequencies, allowing the system to maintain acceptable timing performance while utilizing large bandwidths for high capacity communication.
Data Source
AI summary
A method of operating a radio node in a wireless communication network includes communicating utilising signaling. The communication of the utilising signaling is based on performing pulse-shaping pertaining to the signaling. The pulse-shaping is based on a first pulse-shaping parameter beta. Other related devices and methods are disclosed.