System and method for using circular constellations with uncoded

Details System and method for using circular constellations with uncoded System and method for using circular constellations with uncoded

1997-08-21

2000-02-15

Chin, Stephen

Pulse or digital communications

Systems using alternating or pulsating current

Plural channels for transmission of a single pulse train

375219, H04L 512

Patent

active

06026120&

ABSTRACT:
A system and method for communicating information using circular multidimensional signal space constellations using uncoded modulation allows increased data rate and bandwidth by eliminating trellis encoding, thus reducing the number of computational cycles required for coding. Furthermore, the use of circular signal space constellations lowers the transmit peak factor, thus consuming less power. Using uncoded modulation with circular constellations allows an approximate 10-20% performance improvement for a given central processor unit. Additionally, circular constellations allow the easy and reliable transmission of special marker symbols such as "End of File", "Start of Message", "End of Transmission" or "Increase or Decrease Data Rate".

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