Multi-Node RF Demodulator Using Parallel I/Q Signal Separation
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Solution Overview
Problem
In RF systems, when multiple nodes send signals simultaneously, existing node signal receiving devices face challenges in distinguishing and decoding signals due to varying signal levels and phases between I and Q channels, leading to repeated protocol attempts until only one node responds.
Innovation Solution
A demodulator comprising a clock generator for producing CW signals, mixers for multiplying received signals, integrators for integrating mixed signals, and a data operating unit that calculates variation results at specific symbol durations to determine output data, allowing simultaneous multi-node receiving and increased data modulation speed.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the RF system uses traditional sequential receiving method to handle multiple nodes, then signal decoding accuracy is improved, but signal receiving time and system productivity deteriorate
Solution Approach 1:
The patent divides the received signal into multiple components corresponding to different nodes, and processes each node's signal separately through dedicated demodulating modules. This segmentation allows simultaneous processing of multiple nodes while maintaining accurate decoding for each individual node.
Solution Approach 2:
The patent introduces a new dimension of parallel processing by using multiple demodulating modules that operate simultaneously on different node signals. This transforms the traditional sequential single-dimension processing into multi-dimensional parallel processing, enabling multiple nodes to be received and decoded at the same time.
2Device complexity
If the RF system uses traditional sequential receiving method, then signal processing complexity is reduced, but data modulation speed and system efficiency deteriorate
Solution Approach 1:
The patent segments the signal processing function into multiple independent demodulating modules, each handling a specific node. This segmentation distributes the processing complexity across multiple parallel units, reducing the processing burden on each individual module while increasing overall data modulation speed through concurrent operation.
Solution Approach 2:
The patent performs preliminary signal separation and routing to different demodulating modules before full demodulation occurs. This preliminary action organizes the incoming multi-node signal into distinct processing streams, simplifying the subsequent demodulation process for each node and enabling faster overall processing.
3Reliability
If the RF system receives signals from multiple nodes simultaneously using traditional method, then protocol reliability is improved by avoiding collisions, but system productivity and signal receiving efficiency deteriorate
Solution Approach 1:
The patent introduces demodulating modules as intermediary components that receive and process signals from multiple nodes simultaneously. These intermediaries separate and demodulate each node's signal independently, allowing the system to handle multiple simultaneous transmissions without protocol collisions while maintaining high receiving efficiency.
Solution Approach 2:
The patent transitions from single-dimension sequential protocol handling to multi-dimensional parallel protocol processing. By using multiple demodulating modules operating in parallel, the system can simultaneously manage multiple node communications, improving both protocol reliability and signal receiving efficiency.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This solution reduces signal receiving time for all nodes and enables simultaneous demodulation of data from multiple nodes, enhancing data modulation speed by distinguishing node signals even when multiple nodes respond simultaneously.
Implementation Method 1
a mixer for multiplying received signals and one of the CW signals
Data Source
AI summary
The present invention relates to a demodulator for simultaneous multi-node receiving and a method therof; and, more particularly, a demodulator in a wireless communication system for receiving signals from multi nodes simultaneously and a method thereof.In accordance with the aspect of the present invention, there is provided a demodulator for simultaneous multi-node receiving which comprises: a clock generator for generating a pair of CW signals and a pair of demodulating modules, wherein the demodulating modules comprise a mixer for multiplying received signals and one of the CW signals, an integrator for integrating multiplied signal and data operating unit for calculating variation result of integrated signal at every certain symbol duration and deciding output data in accordance with the variation result.