IR-UWB Encoding Method Frequency Amplitude Modulation
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Solution Overview
Problem
Current IR-UWB systems have low data transfer rates due to limited time utilization, with OOK modulation allowing only one binary data transmission per unit time period, leading to increased circuit complexity and power consumption when attempting to improve data rates.
Innovation Solution
An IR-UWB data transmission encoding/decoding method that generates and transmits UWB impulse radio signals with specific frequencies and amplitudes within each unit time period to encode and decode multiple bits of data, allowing for enhanced time utilization without increasing circuit complexity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If OOK modulation is used to transmit one binary data per unit time period, then the circuit complexity and power consumption are low, but the data rate is low
Solution Approach 1:
The patent transitions from one-dimensional time-based OOK modulation to two-dimensional frequency-amplitude modulation. By introducing frequency selection (N bits) and amplitude modulation (M-N bits) as additional dimensions, the system transmits M bits per time period instead of just 1 bit, achieving higher data rates without increasing temporal complexity
Solution Approach 2:
The patent changes the modulation parameters from simple presence/absence (OOK) to combined frequency and amplitude variations. By varying both frequency (N bits) and amplitude (M-N bits) within each time period, the system encodes M bits of information, effectively increasing data rate while maintaining circuit architecture simplicity
2Productivity
If OOK modulation is used to transmit one binary data per unit time period, then the power consumption is low, but the data rate is low
Solution Approach 1:
The patent introduces frequency and amplitude modulation dimensions alongside temporal modulation. This allows multiple bits to be transmitted within the same time period using different frequency-amplitude combinations, increasing data rate without requiring additional time resources that would increase power consumption
Solution Approach 2:
The system changes the energy utilization pattern by encoding information in frequency and amplitude variations rather than relying solely on temporal presence. This parameter-based encoding achieves higher data rates while maintaining similar power consumption characteristics since the same time period T is used for transmission
3Productivity
If the unit time period T is reduced to increase data rate, then the data rate increases, but the time utilization efficiency decreases
Solution Approach 1:
The patent changes the information encoding parameters from single-bit OOK to multi-bit frequency-amplitude modulation. By encoding M bits per time period through frequency (N bits) and amplitude (M-N bits) variations, the system achieves higher data rates without reducing the time period T, thereby maintaining or improving time utilization 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 method quadruples the conventional data rate by transmitting more than two bits per unit time period, significantly improving data transmission efficiency without increasing circuit complexity or power consumption.
Implementation Method 1
the extremely short duration impulse radio transferred by the communication system in the time domain, which is a signal of very small duty ratio in a cycle transmitted by the communication system, generates a wide bandwidth signal in the frequency domain through the Fourier transform
Data Source
AI summary
The present invention provides an IR-UWB data transmission encoding/decoding method and module. The encoding method comprises: in each unit time period lasting T seconds, receiving an N-bit of binary data of an M-bit binary data stream and generating UWB impulse radio signal having a specific frequency fi, determining and generating an amplitude value Ax of the UWB impulse radio signal having the specific frequency fi according to the remaining M-N bits binary data, and finally transmitting the UWB impulse radio signal having the specific frequency fi and the amplitude value. The decoding method corresponds to the encoding method. According to the present invention, the data transmission rate can be increased by four times compared with the conventional data transmission rate without increasing the circuit complexity, which is useful and attractive to the IR-UWB system.