Interleaved Resource Block Mapping With De-ICI Filter Compensation
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Solution Overview
Problem
Existing wireless communication systems face challenges in effectively compensating for inter-carrier interference (ICI) in high-frequency bands above 52.6 GHz, particularly for interleaved mapping from virtual to physical resource blocks, due to phase noise and channel impairments.
Innovation Solution
Implementing a de-inter-carrier-interference (de-ICI) filter estimation and compensation method for received signals, which includes configuring phase tracking reference signals (PTRS) at specific subcarriers within resource blocks to enable accurate de-mapping and demodulation of physical resource blocks to virtual resource blocks.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If interleaved mapping from virtual to physical resource blocks is used, then frequency diversity and resource utilization are improved, but inter-carrier interference compensation becomes difficult due to phase noise and channel impairments
Solution Approach 1:
The patent applies preliminary action by performing ICI compensation before the de-interleaved de-mapping process. The de-ICI filter is estimated and applied to the received signal while the signal is still in its interleaved state, allowing the filter to effectively compensate for phase noise and channel impairments before the complex de-mapping operation occurs. This timing of the compensation action is crucial for maintaining accuracy.
Solution Approach 2:
The patent introduces a de-inter-carrier-interference (de-ICI) filter as an intermediary element between the received signal and the de-mapping process. This filter acts as a mediator that processes the received signal to remove ICI effects caused by phase noise and channel impairments, enabling accurate recovery of the transmitted data even under challenging high-frequency conditions.
2Reliability
If de-ICI filter estimation is performed on received signals, then ICI mitigation capability is improved, but processing complexity increases
Solution Approach 1:
The patent applies partial action by performing de-ICI filter estimation selectively on specific received signals that require ICI compensation, rather than processing all signals uniformly. The filter estimation is applied to the extent necessary to achieve reliable data transmission, balancing the processing complexity with the actual need for ICI mitigation in high-frequency bands.
Data Source
AI summary
A method, system and apparatus are disclosed for enabling inter carrier interference compensation for interleaved mapping from virtual to physical resource blocks. In one embodiment, a network node is configured to determine to configure the first signal to be located at a subcarrier except at an edge sub-carrier of a resource block, RB; transmit the configuration of the first signal to the WD; and receive a physical uplink shared channel, PUSCH, signaling and the first signal from the WD based at least in part on the determined configuration. In one embodiment, a WD is configured to perform a de-inter-carrier-interference (de-ICI) filter estimation on a first received signal and a second received signal; apply a de-ICI filter to a third received signal, the de-ICI filter being based on the de-ICI filter estimation; and after the application of the de-ICI filter, de-interleaved map and demodulate the third received signal.