Method and apparatus for compensating for residual frequency...

Pulse or digital communications – Systems using alternating or pulsating current – Plural channels for transmission of a single pulse train

Reexamination Certificate

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

C375S344000, C375S362000

Reexamination Certificate

active

10838123

ABSTRACT:
Disclosed is a method for compensating for a residual frequency offset in an orthogonal frequency division multiplexing system comprising the steps of: a) performing a fast fourier transform for an input signal to convert the input signal into a serial signal; b) detecting signal power of the serial signal to control the passthrough a signal greater than a predetermined critical value; c) selecting each section of a quadrant for each passed signal; d) estimating a phase error in each section of the quadrant for one orthogonal frequency division multiplexing symbol with respect to the selected section of the quadrant; and e) frequency-oscillating a signal based on the estimated phase error, generating the input signal by multiplying an oscillated signal by a band-passed signal, and then returning to step a).

REFERENCES:
patent: 5694389 (1997-12-01), Seki et al.
patent: 6151369 (2000-11-01), Ohkubo et al.
patent: 6373861 (2002-04-01), Lee
Kim, “A novel residual carrier synchronization technique for M-QAM-OFDM in the presence of intercarrier interference”, 2003 IEEE International Conference on Consumer Electronics, 2003. ICCE, Jun. 17-19, 2003 pp. 232-233.

LandOfFree

Say what you really think

Search LandOfFree.com for the USA inventors and patents. Rate them and share your experience with other people.

Rating

Method and apparatus for compensating for residual frequency... does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Method and apparatus for compensating for residual frequency..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and apparatus for compensating for residual frequency... will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFUS-PAI-O-3906440

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.