RFTransferJet Physical Layer: Features and Operation
The physical layer of the TransferJet protocol is the foundation for direct wireless connections between devices. It dictates the speed and reliability of data transmission by handling frequency, modulation, and encoding methods.
In this article, we’ll explore the operation of the physical layer and what makes it vital for TransferJet’s ultra-fast and secure data transfers, using its transmitter block diagram as a guide. The physical layer operates according to the TransferJet frame structure, as defined by its standard specifications.
The TransferJet frame usually contains a preamble, sync, and payload. Here are the functions performed at the TransferJet physical (PHY) layer:
- Insertion of a preamble for synchronization.
- Insertion of a header (SYNC) to provide helpful data payload information, like length.
- Forward error correction.
- Spreading using the Direct Sequence Spread Spectrum (DSSS) technique.
- Scrambling operation.
- Modulation of the scrambled data.
| PHY parameter | TransferJet Support |
|---|---|
| Chip Rate (Rc) | 560 MCPS |
| Chip Duration(Tc = 1/Rc) | 1.786 nsec |
| Symbol rate (Rs) | 280 MSPS |
| RF carrier frequency | 4.48 GHz |
| Modulation techniques | π/2 BPSK , DSSS |
| FEC technique | 1/2 Convolutional Encoding , Reed Solomon Encoding |
Table-1: TransferJet PHY parameters
TransferJet physical layer (PHY) Transmitter image:
As illustrated in the figure, the TransferJet physical layer comprises various modules as previously mentioned.
Data from the upper layer (CNL layer) is divided into 224-byte blocks before being passed as input to the TransferJet PHY.
Conclusion
The TransferJet Physical Layer is essential for achieving the system’s high data transfer speeds and reliable communication. Its design ensures devices can communicate effectively, even within a small radius. Understanding its functionality sheds light on how TransferJet maintains its competitive advantage in the wireless communication arena.
