5G-NR Multi-Beam Synchronization Using Combiner Array
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Solution Overview
Problem
Establishing reliable initial synchronization in 5G-NR systems using millimeter wave frequencies is challenging due to high path loss and rapidly changing channel conditions, requiring effective beam steering and tracking techniques to maintain link connectivity between base stations and user equipment.
Innovation Solution
An apparatus and method involving a correlator, buffer, combiner array, and selector to process synchronization signal blocks, estimating noise, beamforming gain, and phase, and applying a combining function to determine the timing index of a primary spreading sequence (PSS) for reliable synchronization, even under varying channel conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple synchronization signal blocks are combined to improve synchronization reliability, then the reliability of synchronization timing estimation is improved, but the device complexity increases due to the need for correlators, buffers, combiner arrays, and selectors
Solution Approach 1:
The synchronization signal is divided into multiple synchronization signal blocks (SSBs) that can be processed independently through the correlator and combiner array, allowing parallel processing and improving reliability without requiring a single complex processing system
Solution Approach 2:
Multiple synchronization signal blocks are combined through the combiner array and selector to produce a unified synchronization timing estimation, improving reliability by aggregating information from multiple blocks while using a modular architecture to manage complexity
2Reliability
If beam steering and tracking techniques are implemented to maintain link connectivity in mmWave environments, then the reliability of link establishment is improved, but the device complexity increases due to the need for analog beam sweeping and beam tracking techniques
Solution Approach 1:
The system performs beam sweeping and initial synchronization in advance before actual data transmission begins, establishing reliable beam alignment and synchronization timing beforehand to ensure subsequent link stability without requiring complex real-time adjustments
Solution Approach 2:
The combiner array processes feedback information about beamforming gain and phase from multiple synchronization signal blocks to optimize beam selection and maintain link reliability, using measured performance data to adjust beam parameters
Data Source
AI summary
An apparatus, a method, a method of manufacturing and apparatus, and a method of constructing an integrated circuit are provided. The apparatus includes a correlator; a buffer connected to the correlator, including a plurality of buffer components; a combiner array, including a plurality of combiners, wherein each of the plurality of combiners includes a plurality of buses, wherein each bus is connected to one buffer component corresponding to a synchronization signal block for each synchronization signal block; and a selector connected to each of the plurality of combiners, where the selector is configured to apply a pre-determined function to the plurality of combiners corresponding to the synchronization signal blocks, determine a maximum of applying the pre-determined function, and determine that a primary spreading sequence (PSS) is detected at a time corresponding to a time associated with the maximum of applying the pre-determined function.