1. IEEE 802.15 TG13 Ad-hoc Berlin Fraunhofer OOK implementation
May 2015
doc.: IEEE /0496r1
July 2017
IEEE TG13 Ad-hoc Berlin Fraunhofer OOK implementation
Date:
Author:
Jonas Hilt (Fraunhofer HHI)
Edward Au (Marvell Semiconductor)

2. May 2015
doc.: IEEE /0496r1
July 2017
Abstract
This presentation informs TG13 about the current OOK implementation at HHI, as a basis for discussion.
Jonas Hilt (Fraunhofer HHI)
Edward Au (Marvell Semiconductor)

3. Content Motivation Features System Overview
May 2015
doc.: IEEE /0496r1
July 2017
Content
Motivation
Features
System Overview
Transmitter and Receiver Architecture
Long Paket Structure for Streaming
Short Paket Structure for Control
Summary
Jonas Hilt (Fraunhofer HHI)
Edward Au (Marvell Semiconductor)

4. May 2015
doc.: IEEE /0496r1
July 2017
Motivation
Fraunhofer HHI has a proprietary implementation of OOK for that has been used for specific customer projects. It does not need any DAC or ADC and is implementable on low-cost SoC platforms.
Robust data transfer e.g. in industrial environments
Simple adaption to different use cases (control, streaming…)
Modulation : OOK (optional: 4-PAM, 4-QAM with two colors)
Up to 50 Mbaud
Jonas Hilt (Fraunhofer HHI)
Edward Au (Marvell Semiconductor)

5. Features Multiple packet types (payload / control data)
May 2015
doc.: IEEE /0496r1
July 2017
Features
Multiple packet types (payload / control data)
8b10b Linecode (in front of FEC)
Reed-Solomon FEC
long packet type: block length 550/524 (x 10 bit)
short packet type: block length 24/36 (x 10 bit)
optional: arbitrary coding rate support
FEC r redundant symbols also 8b10b encoded
get 100% DC free output
CRC16 check-sum in HW (option: calculate in software)
Jonas Hilt (Fraunhofer HHI)
Edward Au (Marvell Semiconductor)

6. System Overview July 2017 May 2015 doc.: IEEE 802.11-15/0496r1 CC IDC
SoC
Preamp
High BW
LED Driver
Amplifier
LED
IAC
LED coupling
LVTTL
OOK
SoC
High BW Detector
OOK reconstruction PD
LVTTL
OOK
Limiting Amp
Jonas Hilt (Fraunhofer HHI)
Edward Au (Marvell Semiconductor)

7. Transmitter Architecture
May 2015
doc.: IEEE /0496r1
July 2017
Transmitter Architecture
Cortex A9
DMA PS
AXI
Linux
frame + CRC16
FEC (RS)
8b10b
IRQ
concat k r
3V3 OOK PL
DMA kernel driver
User Space
user_app_tx.c
serializer
32bit
8bit
10bit
2x10bit
1bit
Jonas Hilt (Fraunhofer HHI)
Edward Au (Marvell Semiconductor)

8. Receiver Architecture
May 2015
doc.: IEEE /0496r1
July 2017
Receiver Architecture 32
Cortex A9
DMA
AXI
Linux
deframe CRC16
FEC (RS)
IRQ
sync
3V3 OOK
k / r split
10b8b k r PL
DMA kernel driver
User Space
user_app_rx.c PS
CLK Recv
32bit
8bit
10bit
1bit
20bit
2x10bit
Jonas Hilt (Fraunhofer HHI)
Edward Au (Marvell Semiconductor)

9. Long Packet Structure for Streaming
May 2015
doc.: IEEE /0496r1
July 2017
Long Packet Structure for Streaming
Sync
CRC16
TYPE
Payload (128 DWORDs)
Sync (DWORD)
Synchronization word, static: 0x2345A6C9 (8b10b: 0x98EA5599A9)
Addr (DWORD)
Payload Address
Needed by some applications to sort rcvd payload into a larger data array.
Payload, arbitrary
CRC16 (WORD, MSB part of last DWORD)
CRC16 checksum over the total package except last DWORD.
TYPE (WORD, LSB part of last DWORD)
reserved for flags. (Not CRC16 protected!)
Coding rate is 550 / 524 (x 10 bit)
Addr
… x 32 bit
Jonas Hilt (Fraunhofer HHI)
Edward Au (Marvell Semiconductor)

10. Short Packet Structure for Control
May 2015
doc.: IEEE /0496r1
July 2017
Short Packet Structure for Control
Sync
CRC16
TYPE
Payload
Sync (DWORD)
Synchronization word, static 0x2345A6C9 (8b10b: 0x98EA5599A9)
Sequence (DWORD)
Sequence number, allows detection and repeating lost packages
Payload (128 DWORDs)
Payload, arbitrary
CRC16 (WORD, MSB part of last DWORD)
CRC16 checksum over the total package except last DWORD.
TYPE (WORD, LSB part of last DWORD)
reserved for flags. (Not CRC16 protected!)
Coding rate is 36 / 24 (x 10 bit)
x 32 bit
Seq
Jonas Hilt (Fraunhofer HHI)
Edward Au (Marvell Semiconductor)

11. May 2015
doc.: IEEE /0496r1
July 2017
Abstract
The presented OOK implementation has been developed, implemented and tested as part of several customer projects at Fraunhofer HHI.
Our intention is to make it compatible with the future specification of OOK/PAM in
Jonas Hilt (Fraunhofer HHI)
Edward Au (Marvell Semiconductor)