UWB Receiver Delay-Pulse Circuit for Stable Desired-Wave Demodulation
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Solution Overview
Problem
Conventional wireless communication systems face challenges in accurately controlling narrow pulses for high-speed communication and distance measurement using ultra-wide band (UWB) signals, leading to interference and difficulties in demodulating signals from distant devices due to power level adjustments.
Innovation Solution
A transmitter and receiver system that employs plural pulse signals with different pulse sequence generating times, utilizing a reception front-end, delay circuit, and delay-pulse composition circuit to cancel out interference waves and demodulate only desirable waves, eliminating the need for filters and allowing for mass production.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional receivers adjust power levels to receive signals from distant devices, then signal reception is enabled, but signal processing becomes inefficient and complex
Solution Approach 1:
The patent extracts and eliminates the need for power level adjustment mechanisms by using delay circuits and composition circuits to directly process and separate signals based on their temporal characteristics, thereby reducing processing complexity while maintaining reception capability
Solution Approach 2:
The patent introduces delay circuits and composition circuits as intermediary components that mediate between the received signal and the final demodulated signal, enabling efficient signal processing without requiring complex power adjustment mechanisms
2Adaptability or versatility
If conventional receivers use multiple filters to handle different frequency bands, then frequency selectivity is improved, but device complexity and cost increase
Solution Approach 1:
The patent makes the delay circuit and composition circuit universal by enabling them to handle multiple frequency bands through temporal differentiation, eliminating the need for separate filters for each frequency band and reducing overall device complexity
Solution Approach 2:
The patent changes the approach from frequency-domain filtering to time-domain processing by using delay circuits with specific delay times, allowing the system to adapt to different frequency bands through parameter changes in the delay circuit rather than physical filter components
3Speed
If UWB communication uses narrow pulses for high-speed communication, then communication speed is improved, but pulse control becomes difficult and interference increases
Solution Approach 1:
The patent applies preliminary action by using delay circuits with predetermined delay times that are set before signal reception, allowing the system to prepare and organize signal processing in advance, thereby simplifying pulse control while maintaining high communication speed
Data Source
AI summary
A transmitter using a plurality of pulse signals having different pulse sequence times, a receiver for steadily demodulating pulse signals of only desirable wave, and a wireless system are disclosed. In the transmitter, a control signal generating circuit outputs a control signal for generating a plurality of pulse signals having different pulse sequence generating times, a pulse generating circuit generates a plurality of pulse signals by using the control signal. In the receiver, reception front end receives the plurality of pulse signals having different pulse sequence generating times, delay circuit delays at least one of reception front-end output signals supplied from the reception front-end by a given time, delay pulse composition circuit combines delay signal with reception front-end output signal so that the receiver steadily demodulates the pulse signals of only the desirable wave.