Phase Synchronization in Asynchronous TDD Systems
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Solution Overview
Problem
In asynchronous TDD systems, existing methods require a large number of random signals for phase synchronization, leading to high overheads and reduced transmission efficiency.
Innovation Solution
A phase synchronization method and apparatus using N timing phase adjusters, a level calculator, and a selector to perform phase adjustments and determine the signal with minimum level fluctuation, reducing the need for excessive random signals and improving synchronization speed.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a large quantity of random signals are inserted for phase synchronization, then phase synchronization can be achieved, but overheads increase and transmission efficiency decreases
Solution Approach 1:
The patent extracts only the necessary phase synchronization information from the received signal and processes it through multiple timing phase adjusters with different phase values. By selecting the optimal phase-adjusted signal based on level fluctuation criteria, the system achieves phase synchronization without requiring large quantities of random signals, thereby reducing overhead while maintaining synchronization reliability
Solution Approach 2:
The patent changes the phase parameter of the received signal by passing it through N timing phase adjusters with different phase adjustment values. This parameter transformation allows the system to find the optimal phase alignment by comparing level fluctuations of differently phase-adjusted signals, achieving synchronization with fewer random signals
2Reliability
If a large quantity of random signals are inserted for phase synchronization, then phase synchronization can be achieved, but access time increases
Solution Approach 1:
The patent performs preliminary phase adjustment by preparing N phase-adjusted signals in parallel through timing phase adjusters before final selection. The level calculator computes level fluctuations for all phase-adjusted signals in advance, and the selector quickly identifies the optimal signal based on minimum level fluctuation, significantly reducing the time required for phase synchronization compared to sequential processing or methods requiring extensive random signals
3Speed
If multiple timing phase adjusters with different phase values are used, then phase synchronization speed increases, but device complexity increases
Solution Approach 1:
The patent segments the phase adjustment function into N independent timing phase adjusters, each handling a specific phase value. This segmentation allows parallel processing of multiple phase-adjusted signals simultaneously, achieving fast synchronization. The level calculator and selector are also segmented into separate functional blocks, making the overall system modular and manageable despite the increased number of components
Data Source
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AI summary
Embodiments of the present invention provide a phase synchronization method and apparatus for an asynchronous TDD system. The apparatus includes: N timing phase adjusters, a level calculator, and a first selector, where each of the N timing phase adjusters is connected to the level calculator and the first selector, and the level calculator is connected to the first selector, where N is an integer greater than or equal to 2; the timing phase adjuster is configured to perform phase adjustment on a first signal according to a phase adjustment value, to obtain an adjusted first signal, where the first signal is a baseband signal, and the N timing phase adjusters respectively correspond to different phase adjustment values; the level calculator is configured to acquire level fluctuation values, within a preset time, of N adjusted first signals, determine an identifier of an adjusted first signal corresponding to a minimum level fluctuation value, and send the identifier to the first selector; and the first selector is configured to output the adjusted first signal corresponding to the identifier. Therefore, fast phase synchronization is implemented, overheads are reduced, and transmission efficiency is improved.