Phase error canceller for QPSK signals using unique word detecto

Details Phase error canceller for QPSK signals using unique word detecto Phase error canceller for QPSK signals using unique word detecto

1994-01-14

1996-03-19

Tse, Young T.

Pulse or digital communications

Receivers

Angle modulation

375349, 329304, H04L 2722

Patent

active

055008763

ABSTRACT:
In a circuit arrangement for correcting phase errors of P-channel and Q-channel baseband signals of a QPSK signal, input registers are provided corresponding respectively to possible bit patterns which the unique words of the P-channel and Q-channel baseband signals may assume. Each input register stores 2N bits of incoming unique words of the P- and Q-channel signals. Reference registers corresponding to the possible bit patterns are provided for individually storing 2N bits of a corresponding one of the possible bit patterns. Mismatches between the bits stored in each input register and the corresponding reference register are detected and compared with thresholds to produce a phase error correcting signal. In response, the connecting paths of the P- and Q-channel baseband signals to output terminals are controlled and bit reversals are effected on the P- and Q-channel baseband signals.

REFERENCES:
patent: 3736507 (1973-05-01), Wolejsza, Jr. et al.
patent: 4847869 (1989-07-01), Labedz et al.
patent: 4993047 (1991-02-01), Moffatt et al.
patent: 5025455 (1991-06-01), Nguyen
patent: 5095536 (1992-03-01), Loper
patent: 5136612 (1992-08-01), Bi

Affiliated with

Also associated with

Rating

Phase error canceller for QPSK signals using unique word detecto does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Phase error canceller for QPSK signals using unique word detecto, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Phase error canceller for QPSK signals using unique word detecto will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1963565