Phase Noise Removal in RF Repeater Networks
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Solution Overview
Problem
Conventional wireless communication systems face challenges in extending coverage and handling a large number of IoT devices due to limitations in Wi-Fi standards, and phase noise in RF signals degrades receiver performance and sensitivity.
Innovation Solution
A network of wireless RF repeaters with a multiprotocol feature that merges and aligns RF signals from different communication protocols into a mmWave signal, using a pilot tone to reduce phase noise and extend coverage, enabling concurrent handling of various protocols and increasing bandwidth.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of stationary object
If conventional Wi-Fi range extenders are used to extend wireless coverage, then coverage range is extended, but data transmission rate decreases and system complexity increases
Solution Approach 1:
The patent changes the frequency parameter by upconverting conventional Wi-Fi signals (2.4 GHz or 5 GHz) to mmWave frequencies (30-300 GHz). This parameter change enables both extended coverage through repeaters and high data transmission rates, as mmWave provides significantly larger bandwidth capacity while the repeater architecture extends the effective coverage range beyond what single-frequency systems can achieve.
2Area of stationary object
If multiple Wi-Fi access points are deployed to extend coverage, then coverage area increases, but device complexity and network management difficulty increase
Solution Approach 1:
The patent creates a universal communication system where a single mmWave repeater infrastructure can handle multiple communication protocols simultaneously. The system converts and transmits various protocols (Wi-Fi, Bluetooth, cellular, IoT) through a unified mmWave platform, eliminating the need for separate access points for each protocol and significantly reducing overall system complexity.
Solution Approach 2:
The patent merges multiple communication protocols and frequency bands into a single mmWave transmission system. By combining the functions of multiple specialized devices into one multi-protocol repeater, the system reduces the number of individual components needed while maintaining comprehensive coverage and support for diverse devices.
3Reliability
If phase noise is present in RF signals, then receiver sensitivity degrades, but signal transmission continues
Solution Approach 1:
The patent extracts and removes phase noise from the RF signals through dedicated phase noise cancellation circuits and signal processing techniques. By separating the harmful phase noise component from the useful signal and actively canceling it, the system maintains high receiver sensitivity even when transmitting through multiple repeaters, preventing the cumulative degradation that would otherwise occur.
Data Source
AI summary
A wireless communication system includes a first communication device and a second communication device. The first communication device comprises a first digital signal processor (DSP) that obtains a plurality of radio frequency (RF) signals corresponding to different communication protocols from a plurality of communication systems, upconverts a frequency of each of the plurality of RF signals to a different frequency, maps and aligns the plurality of RF signals corresponding to the different communication protocols in a mmWave RF signal based on a number of source antennas from which the plurality of RF signals are obtained, multiplexes the plurality of RF signals corresponding to the different communication protocols into the mmWave RF signal of a specified frequency, and transmits the mmWave RF signal of the specified frequency along with a defined pilot tone to the second communication device.