OOK Signal Generation Using OFDM Waveform Alignment
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Solution Overview
Problem
IoT devices face challenges in generating and transmitting OOK signals compatible with 5G NR wireless communication environments, limiting their synchronization and data transmission capabilities.
Innovation Solution
A method involving a reader apparatus generating an OOK signal with an OFDM waveform, where the start of OOK signal transmission is aligned with the boundary of a symbol of the OFDM waveform, and transmitting this signal to an IoT device for synchronization and data transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If IoT devices use traditional OOK for synchronization, then simplicity of implementation is maintained, but compatibility with 5G NR signals is lost
Solution Approach 1:
The patent combines traditional OOK modulation with 5G NR OFDM waveform structure. The OOK signal is generated by modulating the presence or absence of OFDM symbols, merging the simplicity of OOK with the compatibility requirements of 5G NR networks. This allows IoT devices to maintain simple OOK-based synchronization while achieving compatibility with 5G NR signal structures.
2Measurement precision
If OOK signal transmission is not aligned with OFDM symbol boundaries, then transmission flexibility is improved, but signal synchronization accuracy deteriorates
Solution Approach 1:
The patent establishes predetermined alignment rules where OOK signal transmission is synchronized to OFDM symbol boundaries before transmission begins. This preliminary alignment ensures that IoT devices and reader apparatus can accurately identify signal boundaries and achieve precise synchronization without requiring complex real-time adjustment mechanisms, thus maintaining both accuracy and efficiency.
Data Source
AI summary
Various solutions for on-off keying (OOK) signal generation with respect to reader apparatus and an Internet of Things (IoT) device are described. A reader apparatus may generate an OOK signal with an orthogonal frequency-division multiplexing (OFDM) waveform, wherein a start of an OOK signal transmission is aligned with a boundary of a symbol of the OFDM waveform. The reader apparatus may transmit the OOK signal to an IoT device.