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ATPL230A [DATASHEET]

Atmel-43053J-ATPL230A-Datasheet_22-Sep-16

PRIME PHY Layer

9.1

Overview

The physical layer consists of a hardware implementation of the enhanced PRIME Physical Layer Entity, which is an

Orthogonal Frequency Division Multiplexing (OFDM) system in the 42 kHz to 472 kHz frequency band. This PHY layer

transmits and receives MPDUs (MAC Protocol Data Unit) between neighbor nodes.

From the transmission point of view, the PHY layer receives its inputs from the MAC (Medium Access Control) layer.

At the end of transmission branch, data is output to the physical channel.

On the reception side, the PHY layer receives its inputs from the physical channel, and at the end of reception branch,

the data flows to the MAC layer.

A PHY layer block diagram is shown below:

Figure 9-1.

PHY Layer Block Diagram

The diagram can be divided in five sub-blocks: TxRx buffers, Transmission branch, Reception branch, Analog Front

End control and Carrier Detection.

CRC

Interleaver

FFT

Scrambler

Interleaver

IFFT

PRIME PHY Layer

AGC(5:0)

TXRX0

TXRX1

Convolutional

Encoder

Sub-carrier

Modulator

Cyclic

Prefix

Converter / PAD

Analog

Front - End

Control

Gain

Control

TxRx

Control

Pre - FFT

Syncro

Demodulator

Convolutional

Decoder

MAC

layer

from

MAC

layer

Converter

BUF_TXi

BUF_RXi

Sub-carrier

Scrambler

Carrier Detection

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