OFDM-CDMA with peak power reduction based on the spreading sequences

We discuss the construction method of orthogonal sequences for downlink OFDM-CDMA, in terms of the peak to average power ratio (PAPR) of the transmitted signals. The PAPR property is studied based on two orthogonal sets of sequences: Walsh-Hadamard and complementary sequences. It is shown that for r...

Full description

Saved in:
Bibliographic Details
Published in1998 IEEE International Conference on Communications Vol. 3; pp. 1299 - 1303 vol.3
Main Authors Ochiai, H., Imai, H.
Format Conference Proceeding
LanguageEnglish
Published IEEE 1998
Subjects
Construction industry
Downlink
Fading
Frequency domain analysis
Intersymbol interference
Mobile communication
Multicarrier code division multiple access
OFDM modulation
Peak to average power ratio
Transmitters
Online AccessGet full text

Cover

More Information
Summary:We discuss the construction method of orthogonal sequences for downlink OFDM-CDMA, in terms of the peak to average power ratio (PAPR) of the transmitted signals. The PAPR property is studied based on two orthogonal sets of sequences: Walsh-Hadamard and complementary sequences. It is shown that for relatively few active users, Walsh-Hadamard sequences tend to have very large PAPR, while the PAPR of complementary sequences remains stable near its theoretical value. A simple but effective peak reduction scheme is also proposed for OFDM-CDMA.
ISBN:0780347889
9780780347885
DOI:10.1109/ICC.1998.683035