OFDM Reference Signal Block for Single Carrier Channel Estimation
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Solution Overview
Problem
Current wireless communication systems face challenges in efficiently performing channel estimation and beam pairing using single carrier waveforms due to inter-symbol interference and the need for power-consuming operations, which affects throughput and power efficiency, especially in higher frequency ranges.
Innovation Solution
The implementation of a frequency-domain OFDM reference signal block allows for efficient channel estimation and beam pairing by encoding signaling data, reducing the need for complex operations like FFT calculations and enabling a simplified receiver design, thereby improving efficiency and throughput.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If single carrier waveform is used for data transmission, then power efficiency is improved, but channel estimation complexity increases due to inter-symbol interference
Solution Approach 1:
The patent segments the reference signal into multiple blocks, each block corresponding to a specific time-frequency resource. This segmentation allows the receiver to perform channel estimation on individual blocks independently, reducing the overall complexity compared to processing the entire single carrier waveform at once. The segmented approach maintains power efficiency while making channel estimation more manageable.
Solution Approach 2:
The patent introduces reference signal blocks as intermediary elements between the single carrier waveform transmission and the channel estimation process. These reference signal blocks serve as mediators that carry known signaling data, enabling the receiver to estimate channel conditions without directly processing the complex single carrier waveform. This intermediary approach reduces estimation complexity while preserving the power efficiency benefits of single carrier transmission.
2Measurement precision
If FFT calculations are performed for channel estimation, then measurement precision is improved, but power consumption increases
Solution Approach 1:
The patent extracts the essential channel information from the reference signal blocks without requiring full FFT calculations. By taking out only the necessary signaling data from the reference signal blocks and using simplified processing methods, the system achieves adequate channel estimation precision while avoiding the high power consumption associated with complete FFT operations on the entire waveform.
Solution Approach 2:
The patent changes the processing parameters by using reference signal blocks with specific structures that are optimized for low-complexity estimation. Instead of applying FFT to the entire single carrier waveform, the system uses the structured reference signal blocks which allow for parameter-efficient estimation methods, thereby reducing power consumption while maintaining sufficient measurement precision for practical applications.
3Loss of substance
If reference signal block is used, then overhead is reduced, but device complexity increases due to frequency-domain processing
Solution Approach 1:
The patent applies preliminary action by pre-structuring the reference signal blocks with known signaling data before transmission. This preliminary organization of reference signals allows the receiver to perform simpler estimation operations without requiring complex frequency-domain processing of the entire waveform. The overhead is reduced because the reference signal blocks are efficiently designed, and the receiver complexity is managed through this advance preparation.
Data Source
AI summary
Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may receive, from a transmitter, a reference signal block provided based at least in part on an orthogonal frequency division multiplexing (OFDM) waveform. The UE may perform an estimation operation based at least in part on the reference signal block. The UE may receive a data transmission via a single carrier waveform based at least in part on the estimation operation. Numerous other aspects are provided.