Résumé: In a CDMA system the downlink signal typically has a high peak-to-average ratio (Crest Factor). This sets strict requirements for the linearity of the power amplifier, which leads to poor efficiency and high costs. This letter discusses a method for reducing the Crest Factor based on the addition of a signal which is orthogonal to all the active channel codes. Therefore, in an ideal case, no error is introduced at the receiver.

Langue: Anglais