Golay Reference Signaling for Interference-Robust Synchronization

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Solution Overview

Problem

Existing wireless communication systems face challenges in identifying reference signaling efficiently, especially under heavy load conditions, due to interference and the need for good interference characteristics.

Innovation Solution

A radio node processes reference signaling based on a Golay sequence, which provides reliable identification through its autocorrelation characteristics, and differential encoding, allowing for robust synchronization and frequency alignment.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If conventional reference signaling is used, then the system can operate under normal conditions, but under heavy load conditions the reference signaling becomes difficult to identify due to interference

Engineering Contradiction:

Improvereference signaling identification reliabilityVSAvoidinterference

Core Design Contradiction:

ReliabilityVSObject-affected harmful factors

Solution Approach 1:

The patent applies parameter changes by transforming the reference signaling into the frequency domain and applying specific frequency shifts to different sequences. This transforms the time-domain interference problem into a frequency-domain separation problem, where different reference signals are shifted to different frequency locations, reducing mutual interference and improving identifiability under heavy load conditions

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The patent introduces a frequency dimension for sequence differentiation. Instead of only varying sequences in the time domain, the invention applies frequency shifts to place different reference signal sequences at different frequency positions, adding a dimensional separation that reduces interference and improves reliability in identifying reference signaling under heavy load

Inventive Principle:

Principle #17Another dimension (Dimensionality change)

2Adaptability or versatility

If reference signaling covers a large frequency range, then it can serve more functions, but it becomes more difficult to identify and maintain good interference characteristics

Engineering Contradiction:

Improvereference signaling coverageVSAvoidreference signaling identification accuracy

Core Design Contradiction:

Adaptability or versatilityVSMeasurement precision

Solution Approach 1:

The patent segments the large frequency range into multiple smaller frequency intervals, with each interval assigned to a specific reference signal sequence. This segmentation allows the system to maintain good interference characteristics within each segment while collectively covering a large frequency range, improving both versatility and identification accuracy

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent applies local quality by ensuring that within each frequency interval, the reference signaling has optimized local properties for identification. Different frequency intervals can have different local characteristics tailored to their specific functions, allowing the overall system to cover a large bandwidth while maintaining high identification accuracy in each local segment

Inventive Principle:

Principle #3Local quality

Data Source

PatentUS11252002B2Reference signal construction

Publication Date: 2022.02.15 TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)

AI summary

There is disclosed a radio node for a wireless communication network, the radio node being adapted for processing reference signaling based on a coding, the coding being based on a Golay sequence. The disclosure also pertains to related devices and methods.