Next-generation MOST PHY with 1Gbit/s keeping today's optoelectronics and fiber: Page 5 of 6

May 31, 2012 //By Norbert Weber, Conrad Zerna, Fraunhofer IIS
Next-generation MOST PHY with 1Gbit/s keeping today's optoelectronics and fiber
The optical version of the MOST physical layer has several well-known advantages. It has virtually no EMI problems. The SI-POF has low weight and the fiber and optoelectronics are low-cost. As the need for higher data rates grows, the feasability of the next generation of MOST on the currently attractive link components becomes an urgent topic. The article describes the Physical Layer for future Gigabit MOST.
and communications at the Fraunhofer Institute for Integrated Circuits, Germany. He has developed several equalizers of different architectures for data transmission over POF for speeds up to 3.4Gbit/s.

References:

[1] POF-Plus website ( https://www.ict-pof-plus.eu/)

[2] Bernd Offenbeck et al, “Results of Gigabit/s Transmission using RC-LEDs and New Driving Techniques”, ICPOF'09 PS104, September 2009

[3] Jan Sundermeyer et al, “Integrated Analogue Adaptive Equalizer for Gigabit Transmission over Standard Step Index Plastic Optical Fiber (SI-POF)”, Proceedings LEOS '09. IEEE TuI2, October 2009

[4] C. Zerna, N. Weber, “Integrated PAM2 Decision Feedback Equalizer for Gigabit Ethernet over Standard SI-POF Using Red LED”, ECOC 2010, October 2010

[5] Standard IEC 60793-2-40 category A4.a2

[6] ISMB website ( https://www.ismb.it/en)

[7] R. Gaudino et al, “First demonstration of real-time LED-based Gigabit Ethernet transmission on 50m of A4a.2 SI-POF with significant system margin“, in Proceedings of ECOC2010, post-deadline paper , October 2010

[8] “MOST – The Automotive Multimedia Network”, 2nd edition, Franzis 2011, Chapter 6.5

Table 1 – MOST next generation power budget calculation 

 

 

 

MOST150

comment

MOST next generation

comment

 

Transmitter

Min TX power, average / dBm

 

 

-8.5

 

 

 

 

Min ER /dB

 

 

10

 

 

 

Min TX OMA / uW

 

 

231.1

 

200

Fiber-coupled power at 85°C

 

Losses in the channel

 

Per piece or m / dB

Piece/length used

Total loss / dB

Piece/length used

Total loss / dB

 

Inline connector

2

2

4

2

4

 

Fiber

0.4

11.2

4.48

10

4

Fiber length had to be reduced by 1.2m

Coupling endpoints

2.5

2

5

1

5.2

No TX loss, RX loss higher

Accumulated Loss

 

 

13.48

 

13.2

 

 

Receiver

Min RX power average / dBm

 

 

-21.98

 

 

 

Min RX OMA / uW

 

 

10.37

 

9.57

 

RX sensitivity / dBm

 

 

-22

For BER=10^9

 

 

Design category: 

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