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Reducing the crest factor of CDMA downlink signal by adding unused channelization codes

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4 Author(s)
Vaananen, O. ; Electron. Circuit Design Lab., Helsinki Univ. of Technol., Espoo, Finland ; Vankka, J. ; Viero, T. ; Halonen, K.

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 paper 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 ideal case, no error is introduced at the receiver.

Published in:

Spread Spectrum Techniques and Applications, 2002 IEEE Seventh International Symposium on  (Volume:2 )

Date of Conference:

2-5 Sept. 2002