Wireless Data Transmission Frequency Switching Synchronization
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Solution Overview
Problem
Existing wireless data transmission methods between base stations and passive transponders face challenges in increasing transmission range and security due to interference and reduced data throughput caused by frequency hopping, which often requires resynchronization or results in faulty frames.
Innovation Solution
A method and circuit configuration that allows for time-saving switching of the carrier signal frequency within synchronization markers, ensuring only one frequency is used at a time, eliminating additional synchronization markers and maintaining frame integrity, thereby increasing data throughput without necessitating resynchronization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If frequency hopping is used to reduce interference, then transmission security is improved, but data throughput decreases due to resynchronization requirements and faulty frames
Solution Approach 1:
The patent applies preliminary action by pre-planning frequency changes to occur only during synchronization markers. The base station prepares and signals frequency change information in advance within the synchronization marker structure, allowing the transponder to anticipate and adapt to frequency changes without interrupting data transmission or requiring resynchronization, thus maintaining both security and throughput
2Reliability
If carrier signal is completely suppressed during modulation to generate synchronization markers, then transmission security is improved, but transmission range is reduced due to energy input suppression
Solution Approach 1:
The patent applies partial action by suppressing the carrier signal only during the brief duration of synchronization markers rather than continuously. The carrier signal is restored between synchronization markers, maintaining energy input and transmission range while still providing sufficient synchronization markers for secure transmission. This partial suppression balances security requirements with range maintenance
3Productivity
If modulation time is reduced to increase data throughput, then productivity is improved, but bandwidth requirement increases
Solution Approach 1:
The patent applies periodic action by introducing synchronization markers at regular intervals within the data transmission stream. These periodic markers serve dual purposes: they maintain transmission security through carrier suppression while the data transmission occurs continuously between markers, achieving high throughput without requiring excessively long modulation times. The periodic structure allows efficient use of bandwidth while maintaining high productivity
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 approach enhances data throughput by allowing rapid frequency switching without disrupting frames, reducing interference, and maintaining robust data transmission with high noise immunity, even in passive systems.
Implementation Method 1
the base station emits electromagnetic carrier waves, which are modulated and reflected by the transmitting and receiving device of the transponder
Implementation Method 2
Passive transponders derive the energy necessary for their supply from the electromagnetic field emitted by the base station
Implementation Method 3
Backscatter coupling is typically employed for data transmission from a transponder to a base station with UHF or microwaves in the far field
Data Source
AI summary
A method and apparatus for wireless data transmission between a base station and one or more, in particular, passive and/or backscatter-based transponders, in which the base station modulates a carrier signal with a modulation signal, to generate synchronization markers, and transmits the modulated carrier signal. Whereby, a frequency of the modulated carrier signal can be switched between different frequency values.