Single-Device Channel State Information Measurement via Self-Loopback

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Solution Overview

Problem

Current methods for obtaining channel state information (CSI) in wireless communications require two devices, making it inconvenient for users and are affected by environmental changes, which complicates sensing detection.

Innovation Solution

A single electronic device with a wireless communication chip and two antennas is used to broadcast and receive packets, allowing the processing circuit to determine CSI, and the energy of the LOS propagation path is lowered to enhance CSI variation detection by eliminating high-power signals from direct paths.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Measurement precision

If two devices are used to obtain CSI, then CSI measurement is possible, but user convenience deteriorates

Engineering Contradiction:

ImproveCSI measurement capabilityVSAvoidUser convenience

Core Design Contradiction:

Measurement precisionVSEase of operation

Solution Approach 1:

The patent merges the functions of two separate devices into a single electronic device by integrating both transmitting and receiving circuits within the same device, enabling the device to perform CSI measurement autonomously without requiring a separate paired device

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The electronic device is designed with multi-functionality, serving both as transmitter and receiver for CSI measurement, thereby eliminating the need for dedicated separate devices and improving user convenience while maintaining measurement capability

Inventive Principle:

Principle #6Universality (Multi-functionality)

2Measurement precision

If traditional two-device CSI measurement is used, then CSI can be obtained, but sensitivity to environmental changes deteriorates

Engineering Contradiction:

ImproveCSI measurement capabilityVSAvoidSensing detection sensitivity

Core Design Contradiction:

Measurement precisionVSDifficulty of detecting and measuring

Solution Approach 1:

The patent extracts and removes the high-power LOS propagation path signal from the received signal, isolating the weaker reflected and scattered signals that carry environmental change information, thereby enhancing sensing detection sensitivity

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

The patent converts the harmful effect of high-power LOS signals that mask environmental variations into a benefit by deliberately removing them, allowing the weaker but information-rich reflected and scattered signals to be detected for enhanced environmental sensing

Inventive Principle:

Principle #22Blessing in disguise (Convert harm into benefit)

Data Source

PatentUS12003299B2Channel state information measurement method and associated wireless communication chip and electronic device

Publication Date: 2024.06.04 MEDIATEK INC

AI summary

The present invention provides an electronic device including a first antenna, a second antenna and a wireless communication chip. The wireless communication chip is configured to control the first antenna to broadcast a packet, control the second antenna to receive the packet broadcasted from the first antenna, and determine channel state information according to the packet received by the second antenna.