OFDM Symbol Sub-Symbol Segmentation for Spectrum Utilization
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Solution Overview
Problem
High-frequency millimeter-wave systems face inefficiencies due to the unnecessary waste of long cyclic prefix resources in the time domain, leading to low spectrum utilization when using high-order sub-carrier spaces, as the cyclic prefix is longer than other symbols and occupies valuable time-domain resources.
Innovation Solution
The method involves dividing the first OFDM symbol into multiple sub-symbols, allowing the cyclic prefix time to be utilized for information transmission, thereby reducing waste and enhancing spectrum utilization by using the time-domain resource for transmitting target information on these sub-symbols.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If high-order sub-carrier spaces are used in millimeter-wave systems, then peak data rate is improved, but spectrum utilization deteriorates due to waste of long cyclic prefix resources
Solution Approach 1:
The first OFDM symbol is segmented into multiple sub-symbols (at least two), allowing the cyclic prefix time to be divided and utilized for information transmission on these sub-symbols, thereby converting previously wasted time-domain resources into useful data transmission capacity and improving spectrum utilization while maintaining high peak data rates
Data Source
AI summary
An information transmission method includes: sending target information on at least one sub symbol of a first OFDM symbol. The first OFDM symbol includes at least two sub symbols.