Correction of amplitude and phase imbalance in psk receivers

Details Correction of amplitude and phase imbalance in psk receivers Correction of amplitude and phase imbalance in psk receivers

H - Electricity

04

L

H04L 27/22 (2006.01) H04L 27/00 (2006.01)

Patent

CA 2351761

The present invention balances the amplitude and phase of a received QPSK signal that may have been corrupted during transmission. The system determines the amplitude of the I and Q symbols of a received signal, compares them, and applies a correction to one or both channels to correct for amplitude imbalance. For phase imbalance, the system calculates the cross-correlation of the I and Q symbols which should average to zero. A correction factor is derived from the cross- correlation and applied to both channels, returning the phase cross-correlation to zero. The output from the system is a signal corrected in both amplitude and phase.

Cette invention permet d'équilibrer l'amplitude et la phase d'un signal QPSK ayant pu être altéré pendant la transmission. Le système utilisé à cet effet détermine l'amplitude des symboles I et Q d'un signal reçu, compare ces amplitudes et applique une correction à l'un et/ou l'autre des canaux, en vue de corriger le déséquilibre d'amplitude. Pour le déséquilibre de phase, le système calcule la corrélation croisée des symboles I et Q dont la moyenne devrait être égale à zéro. Un facteur de correction est dérivé de cette corrélation croisée et appliqué aux deux canaux, ramenant à zéro la corrélation croisée de la phase. Le signal de sortie produit par le système est un signal corrigé à la fois en amplitude et en phase.

Affiliated with

Also associated with

Rating

Correction of amplitude and phase imbalance in psk receivers does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Correction of amplitude and phase imbalance in psk receivers, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Correction of amplitude and phase imbalance in psk receivers will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFCA-PAI-O-1727768