Packet Detection Using Multiple Antennas and Correlation
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Solution Overview
Problem
Conventional packet detection techniques limit the range of user equipment (UE) due to the undetectability of repeating symbols in packet transmission, especially when enhanced hardware and software mechanisms are not beneficial, leading to difficulties in identifying packets at distances where the symbols become undetectable.
Innovation Solution
The method involves combining signals received from multiple receive antennas to determine combined signal parameters, using a delay and correlate algorithm to identify correlations between these parameters, thereby enhancing packet detection sensitivity and range.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional packet detection techniques are used, then the UE can detect packets within a limited range, but the detection fails at greater distances where repeating symbols become undetectable
Solution Approach 1:
The patent combines signals from multiple receive antennas (first antenna and second antenna) to create a composite signal for packet detection. By merging the signals and their respective channel responses, the system enhances the detectability of repeating symbols at greater distances, resolving the contradiction between detection reliability and detection range.
2Length of stationary object
If hardware and software mechanisms are implemented to increase transmission range, then the packet can reach farther distances, but the repeating symbols become undetectable at these extended ranges
Solution Approach 1:
The patent merges channel responses from multiple antennas to enhance symbol detectability at extended transmission ranges. By combining the channel responses and applying correlation processing to the composite signal, the system maintains the ability to detect repeating symbols even when they have propagated over longer distances where individual antenna signals would be too weak.
Solution Approach 2:
The patent employs correlation processing that compares the composite channel response against expected repeating symbol patterns. This feedback mechanism allows the system to identify and detect repeating symbols by matching the received signal characteristics against known patterns, enabling reliable detection at extended ranges where the symbols would otherwise be indistinguishable from noise.
3Measurement precision
If the UE monitors a frequency band for packet detection, then it can identify incoming packets, but it cannot distinguish between noise and channel responses at greater distances
Solution Approach 1:
The patent combines channel responses from multiple receive antennas to create a composite signal with enhanced signal-to-noise ratio. By merging the individual channel responses and their corresponding signals, the system improves measurement precision in distinguishing actual channel responses from noise at greater detection distances.
Solution Approach 2:
The patent uses correlation processing that provides feedback by comparing the composite channel response against expected repeating symbol patterns. This feedback mechanism enables the system to differentiate between noise and actual channel responses by identifying characteristic patterns that match known repeating symbol structures, even at extended detection distances.
Data Source
AI summary
A device and method for a user equipment (UE) to perform packet detection using multiple receive antennas. The UE receives a first signal at two or more of the plurality of receive antennas. The UE determines a first combined signal parameter based on the first signal received at the two or more receive antennas. The UE receives a second signal at the two or more receive antennas. The UE determines a second combined signal parameter based on the second signal received at the two or more receive antennas. The UE detects a packet based on at least identifying a correlation between the first combined signal parameter and the second combined signal parameter.