2007

Poznańskie Warsztaty Telekomunikacyjne Poznań 6 - 7 grudnia 2007

P O Z NPOZNAN A N U N IUNIVERSITY V E R S I T Y OOF F TTECHNOLOGY E C H N O L O G YACADEMIC A C A D E MJOURNALS IC JOURNALS No Electrical Engineering

Andrzej WOLCZKO* Łukasz ŚLIWCZŃSKI* Marcin LIPIŃSKI* Przemysław KREHLIK*

AN IMPLEMENTATION OF THE LINE CODE MB810 MB810 (minimum bandwidth 8B/10B) ) is another version of the popular 8B/10B code. It has been designed to obtain two properties: concentration of the power density in the low frequency range and elimination of the DC component. The description of the code, implementation in FPGA Spartan3 circuit and the results of the tests are briefly described in the text.

Keywords: 8B/10B codes, FPGA implementation, VHDL

1. INTRODUCTION Patented in 2002 year [1] the MB810 code is not a composition of the subcodes as well known since eighties 8B/10B [2] (composition of 5B/6B and 3B/4B) but according to described in the patent procedure each possible 8-bit block is directly converted into 10-bit block.

2. BASE OF MB810 CODE Inventors of the code assumed that goals to be achieved are: • elimination of the DC component in serial data stream formed from 10bit code blocks • getting the power density spectrum mostly concentrated below the half Nyquist frequency f