OFDM/OQAM Pilot Signal Segmentation for Channel Estimation
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Solution Overview
Problem
Conventional multicarrier modulation schemes face complexity in processing and increased transmission power due to the need for calculating and canceling interference in pilot signals, especially when dealing with OFDM/OQAM, which complicates the estimation of transmission channel characteristics.
Innovation Solution
A multicarrier modulation scheme that incorporates phase reference pilot signals with zero amplitude and amplitude reference pilot signals, allowing for simplified estimation of transmission channel characteristics at the reception end without calculating interference at the transmission end, thereby reducing transmission power.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional pilot signals are used in OFDM/OQAM multicarrier modulation, then transmission channel characteristics can be estimated, but calculation complexity increases and transmission power is consumed
Solution Approach 1:
The invention extracts only the necessary phase reference information from pilot signals by setting specific pilot symbols to carry only phase reference (with zero amplitude reference), separating phase estimation function from amplitude estimation function. This reduces the calculation complexity at the receiver while maintaining accurate channel characteristic estimation.
Solution Approach 2:
The pilot signal is segmented into different types: phase reference pilots (with zero amplitude) and amplitude reference pilots (with known amplitude). This segmentation allows the receiver to process phase and amplitude information separately, reducing overall processing complexity while maintaining estimation accuracy.
2Measurement precision
If conventional pilot signals are used in OFDM/OQAM multicarrier modulation, then transmission channel characteristics can be estimated, but transmission power is consumed
Solution Approach 1:
The invention extracts only the necessary phase reference information from pilot signals by setting specific pilot symbols to carry only phase reference (with zero amplitude reference), separating phase estimation function from amplitude estimation function. This reduces the calculation complexity at the receiver while maintaining accurate channel characteristic estimation.
Solution Approach 2:
The pilot signal is segmented into different types: phase reference pilots (with zero amplitude) and amplitude reference pilots (with known amplitude). This segmentation allows the receiver to process phase and amplitude information separately, reducing overall processing complexity while maintaining estimation accuracy.
Data Source
AI summary
In order is to generate a pilot signal for estimating a transmission characteristic of a transmission channel suitable for OFDM/OQAM multicarrier modulation, a phase reference pilot symbol of which a modulation amplitude is suppressed to zero, and an amplitude reference pilot signal obtained through modulation performed by using an amplitude known to a reception end are transmitted from a transmission end. Further, the transmission characteristic of the transmission channel is estimated and compensated using the phase reference pilot signal and the amplitude reference pilot signal at the reception end. Accordingly, it is possible to simplify a frame generation process performed at the transmission end, and reduce transmission power for the phase reference pilot signal.