OFDM Symbol Phase Deviation for Simultaneous Load and Data Transmission
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Solution Overview
Problem
In wireless networks based on orthogonal frequency division multiplexing (OFDM), the existing method of transmitting load information using OFDM symbols limits the simultaneous transmission of other information, resulting in low information transmission efficiency and resource utilization.
Innovation Solution
The method involves determining an initial OFDM symbol and calculating a phase deviation difference between adjacent OFDM symbols to perform phase deviation on these symbols, allowing additional information to be transmitted simultaneously with load information, thereby improving efficiency and resource utilization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If load information is transmitted by using OFDM symbols, then load information can be transmitted reliably, but other information cannot be transmitted at the same time, resulting in low information transmission efficiency and resource utilization
Solution Approach 1:
The patent introduces a new dimension for information transmission by utilizing phase deviation in the time domain. While traditional OFDM symbols transmit load information through amplitude and frequency modulation, this invention adds phase deviation as an additional dimension, allowing first information to be transmitted simultaneously with load information without interfering with the existing transmission mechanism.
Solution Approach 2:
The patent changes the parameter of phase deviation in OFDM symbols to encode first information. By controlling the phase deviation between adjacent OFDM symbols, the system can transmit additional information while maintaining the original load information transmission. The phase deviation values are specifically designed to be distinguishable from normal channel variations, enabling reliable detection of the transmitted first information.
2Productivity
If OFDM symbols are used for load information transmission, then transmission reliability is maintained, but transmission resource utilization is low due to inability to transmit multiple types of information simultaneously
Solution Approach 1:
The patent employs feedback mechanisms where the receiving end detects phase deviations in received OFDM symbols and uses this information to decode the first information. The system continuously monitors and adjusts for phase variations, distinguishing between phase deviations caused by channel conditions and those intentionally introduced to encode first information, thereby enabling reliable simultaneous transmission without excessive complexity.
Data Source
AI summary
A method, an apparatus, and a device are provided for information transmission. In the method, the apparatus determines an initial OFDM symbol in OFDM symbols used to transmit load information. The apparatus determines, starting from the initial OFDM symbol, a phase deviation difference between two adjacent OFDM symbols according to first information to be transmitted. The apparatus performs phase deviation on at least one of the OFDM symbols according to the phase deviation difference. The apparatus then sends the OFDM symbols obtained after the phase deviation to a receiving end.