UE Frequency Translation Repeater Signal Decoding
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Solution Overview
Problem
Current 5G New Radio (NR) technology faces limitations in efficiently transmitting data across different frequency bands, particularly in distributed MIMO receivers, where existing methods struggle to optimize data transmission and reception using multiple antennas and subcarriers, leading to suboptimal performance and complexity in decoding layers of data.
Innovation Solution
The proposed solution involves a method where user equipment (UE) receives second time domain signals with L layers of data through multiple receiving antennas on a second frequency band, processing sets of modulation symbols on different subcarriers, and determining data layers by mapping these symbols across intervals, while the base station transmits data on a first frequency band using N1 subcarriers, enabling efficient decoding and transmission across multiple antennas.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If data is transmitted across different frequency bands using distributed MIMO receivers, then spectral efficiency and coverage are improved, but decoding complexity and processing overhead increase
Solution Approach 1:
The patent segments the received signal processing into distinct stages: receiving signals on first frequency band, frequency translation to second frequency band, and separate decoding of modulation symbols. This segmentation allows the UE to handle different frequency bands and symbol sets independently, reducing overall decoding complexity while maintaining transmission efficiency across distributed MIMO receivers
Solution Approach 2:
The patent introduces frequency translation as an intermediary process between the first and second frequency bands. The base station translates modulation symbols from the first frequency band to a second frequency band before transmission, creating an intermediate representation that simplifies the receiving and decoding process at the UE, thereby reducing processing overhead while maintaining spectral efficiency
2Reliability
If multiple receiving antennas are used on different frequency bands, then spatial diversity and reliability are improved, but processing overhead and resource requirements increase
Solution Approach 1:
The patent applies local quality by assigning specific receiving antennas to specific frequency bands (first and second frequency bands). Each antenna is optimized for receiving signals on its designated band, and the UE processes symbols from each antenna independently before combining results. This localized processing approach improves reception reliability through spatial diversity while minimizing processing overhead by avoiding full-signal processing across all antennas and bands simultaneously
3Productivity
If data layers are transmitted using different subcarrier spacings, then spectral efficiency is improved, but mapping complexity and synchronization requirements increase
Solution Approach 1:
The patent utilizes parameter changes by transmitting different data layers on different subcarrier spacings (first subcarrier spacing and second subcarrier spacing). The base station configures the UE with specific mapping rules that account for these different spacing parameters, allowing efficient spectral utilization across multiple layers while managing mapping complexity through predefined relationships between the spacing parameters
4Productivity
If modulation symbols are mapped across multiple time intervals, then data throughput is improved, but decoding complexity and resource coordination increase
Solution Approach 1:
The patent applies preliminary action by establishing mapping rules in advance that define how modulation symbols from multiple time intervals should be combined and decoded. The base station provides the UE with predetermined mapping configurations before data transmission begins, allowing the UE to efficiently process symbols across multiple intervals without real-time coordination overhead, thereby improving throughput while managing decoding complexity
Data Source
AI summary
A UE receives second time domain signals, each carrying L layers of data, in S second intervals corresponding to a second subcarrier spacing. Each of the second intervals contains one or more OFDM symbols. The L layers of data are transmitted by a base station through sets of N1 modulation symbols carried on N1 subcarriers of a first subcarrier spacing. The UE obtains sets of N2 modulation symbols carried on N2 reception subcarriers of the second subcarrier spacing from each second time domain signal received through each receiving antenna in each second interval. Each set of the sets of N2 modulation symbols corresponds to one of the OFDM symbols in the S second intervals. The UE obtains a mapping rule that maps the sets of N2 modulation symbols received in two or more of the S second intervals to a resource set for decoding together.