Frequency Domain Detection Filter for High-Frequency RACH Signals
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing wireless access systems face challenges in efficiently detecting uplink synchronization signals, particularly in high frequency bands, due to increased complexity and interference, which affects the accuracy and simplicity of signal detection.
Innovation Solution
A method involving the use of a frequency domain detection filter, specifically defined by the equation Gm=FHdiag(Fs(0))F, and a target UE detection filter configured based on cyclic shift values, to efficiently detect RACH signals and identify transmitting UEs with reduced complexity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If time domain detection filter is used for RACH signal detection, then detection capability is maintained, but detection complexity increases significantly
Solution Approach 1:
The patent replaces the time domain detection filter with a frequency domain detection filter. The frequency domain filter processes signals using frequency-based operations (FFT and frequency-selective combining) instead of time-domain convolution, significantly reducing computational complexity while maintaining detection accuracy for RACH signals in high frequency bands.
Solution Approach 2:
The patent changes the detection parameter domain from time domain to frequency domain. By transforming the detection filter operation from time-based correlation to frequency-based spectral analysis, the system achieves lower complexity while preserving the ability to detect synchronized signals accurately.
2Device complexity
If frequency domain detection filter is used, then detection complexity is reduced, but filter design must account for high frequency band channel characteristics
Solution Approach 1:
The patent adapts the detection filter to high frequency band characteristics by changing the frequency domain parameters. The filter incorporates frequency-selective combining based on the specific subcarrier spacing and channel properties of high frequency bands, making the filter design tailored to these conditions rather than a generic approach.
Solution Approach 2:
The frequency domain detection filter dynamically adjusts to different high frequency band conditions by incorporating frequency-selective elements that can adapt to varying channel characteristics. This allows the filter to maintain effectiveness across different deployment scenarios in high frequency bands.
Data Source
AI summary
The present invention provides a method for detecting an uplink synchronization signal in a wireless access system supporting a high-frequency band, a method for designing a detection filter for the same and an apparatus for supporting the same. According to one embodiment of the present invention, a method for detecting a random access channel signal by a base station in a wireless access system supporting the high-frequency band comprises: allocating a cyclic shift value used in the base station; configuring a received signal vector for a signal transmitted via a random access channel; detecting at least one RACH signal from the received signal vector, using a frequency domain detecting filter; and identifying at least one terminal having transmitted at least one RACH signal, using a target terminal detecting filter, wherein the filter for detecting a target terminal may be set on the basis of the cyclic shift value.