Pulse or digital communications – Repeaters – Testing
Patent
1993-11-01
1995-05-09
Swann, Tod R.
Pulse or digital communications
Repeaters
Testing
380 34, 375205, H04K 100
Patent
active
054147280
ABSTRACT:
An improved system and method for communicating information over in-phase (I) and quadrature phase (Q) communication channels in a spread spectrum communication system is disclosed herein. In an exemplary implementation, first and second information signals are respectively transmitted over the I and Q communication channels using direct sequence spread spectrum communication signals. In-phase pseudorandom noise (PN.sub.I) and quadrature phase pseudorandom noise (PN.sub.Q) signals of predetermined PN codes are used for spreading the first and second information signals, respectively. In particular, the PN.sub.I and PN.sub.Q signals are respectively combined with the first and second information signals and an orthogonal function signal to provide I-channel and Q-channel modulation signals. The I-channel and Q-channel modulation signals are used for modulating in-phase (I) and quadrature phase (Q) carrier signals for transmission to a receiver via the I and Q communication channels, respectively. In a preferred implementation the receiver is operative to produce an estimate of at least the first information signal on the basis of the I-channel and Q-channel modulated carrier signals received over the I and Q communication channels. The received I-channel and Q-channel modulated carrier signals are demodulated and despread, with the resultant sequences being correlated into in-phase (I) and quadrature phase (Q) projection signals. A phase rotator operates to provide an estimate of at least the first information signal based on the I and Q projection signals and a received pilot signal.
REFERENCES:
patent: 5103459 (1992-04-01), Gilhousen et al.
patent: 5216692 (1993-06-01), Ling
patent: 5235614 (1993-08-01), Bruckert et al.
patent: 5297161 (1994-03-01), Ling
Miller Russell B.
Qualcomm Incorporated
Swann Tod R.
LandOfFree
Method and apparatus for bifurcating signal transmission over in 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 bifurcating signal transmission over in, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and apparatus for bifurcating signal transmission over in will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1711571