Method and apparatus for restoring multi level/phase modulation data
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Mar 14, 1995
Grant Date -
N/A
app pub date -
Apr 15, 1994
filing date -
Apr 15, 1993
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A method and apparatus for receiving multi level/phase modulation data and restoring the received data to its original data state. The received data is demodulated and deinterleaved. The deinterleaved data is decoded in a Trellis decoder. Here, when the data to be deinterleaved is not synchronized, the deinterleaving sync is shifted, the deinterleaving operation is again repeated, thereby correcting .+-.180.degree. phase error. The multi level/phase decoder includes an axis exchanger for exchanging the I-axis data and the Q-axis with each other. Accordingly, when the sync is not matched even though the sync is shifted by one cycle in the deinterleaver, the axis exchange is performed in the axis exchanger. Then, the axis-exchanges data is deinterleaved and Trellis-decoded, to thereby correct .+-.90.degree. phase error.
First Claim
Family
International Classification(s)
Cited Art Landscape
Patent Citation Ranking
Advertisement
Advertisement
Advertisement
Recipient Email Address
Recipient Email Address
Comment
Recipient Email Address
Add to Portfolio(s)
To add this patent to one, or more, of your portfolios, simply click the add button.
This Patent is in these Portfolios:
Add to additional portfolios:
Last Refreshed On:
Changes done successfully