Infrastructure Equipment Cepstrum-Based SINR Estimation
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Solution Overview
Problem
Future wireless communications networks face challenges in efficiently supporting a wide range of devices with different data traffic profiles, requiring adaptive waveform generation to optimize resource allocation and modulation schemes based on varying channel conditions.
Innovation Solution
The implementation of infrastructure equipment and communications devices that use transceiver and controller circuitry to estimate signal-to-interference-and-noise ratios (SINR) across resource units, perform specific transforms to generate a cepstrum, and encode it for transmission, allowing for dynamic resource allocation and modulation adjustments based on channel conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a single waveform generation approach is used for all devices, then device complexity is reduced, but adaptability to different channel conditions and traffic profiles deteriorates
Solution Approach 1:
The patent segments the communications channel into multiple resource units (RUs) with different time-frequency resources. Each RU can be independently configured with different waveform parameters (cyclic prefix length, FFT size, subcarrier spacing) to match specific channel conditions and device requirements, allowing adaptive optimization without requiring each device to generate all possible waveform types
Solution Approach 2:
The patent introduces dynamic waveform generation where the transmitter adapts waveform parameters based on real-time channel conditions and device capabilities. The system dynamically selects appropriate cyclic prefix lengths, FFT sizes, and subcarrier spacings for each RU, enabling the same device to serve multiple device types with different traffic profiles without increasing inherent device complexity
2Productivity
If resource allocation is optimized for each device individually, then throughput is improved, but processing time and system complexity increase
Solution Approach 1:
The patent performs preliminary channel estimation using reference signals transmitted before data transmission. The receiver estimates channel conditions for each RU in advance, allowing the transmitter to pre-configure optimal waveform parameters and resource allocations before actual data transmission, thereby maximizing throughput without adding processing delays during the critical data transmission phase
Solution Approach 2:
The patent changes key waveform parameters (cyclic prefix length, FFT size, subcarrier spacing) based on estimated channel conditions for each RU. By adjusting these parameters dynamically, the system optimizes throughput for different channel quality and device types without requiring complex real-time processing during data transmission, as the parameter selection is based on pre-estimated channel characteristics
3Measurement precision
If detailed channel estimation is performed for each resource unit, then modulation accuracy is improved, but computational complexity increases
Solution Approach 1:
The patent divides the channel into multiple resource units (RUs) and performs separate SINR estimation for each RU based on reference signals. This segmentation allows focused, accurate estimation for each time-frequency resource without requiring exhaustive analysis of the entire channel, balancing precision with computational feasibility by concentrating resources on localized estimates where they are most needed
Data Source
AI summary
Infrastructure equipment forming part of a wireless communications network configured to receive data from a communications device via a communications channel between the infrastructure equipment and the communications device. The infrastructure equipment comprises circuitry configured to receive, from the communications device, a request for a resource allocation, to receive one or more reference symbols from the communications device, to estimate based on the received reference symbols, for each of a plurality of resource units, RUs, of the communications channel, a signal to interference and noise ratio, SINR, sequence of the communications channel, and to perform a first transform followed by a second transform on the SINR sequence to produce a cepstrum of the SINR sequence, the second transform being an inverse of the first transform, and to encode and to transmit the cepstrum to the communications device.