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Soft orthogonal phase shift keying (SOPK) modulation with OVSF-MAC for UMTS

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2 Author(s)
da Silva Pereira, J. ; Departamento de Engenharia Informatica, Escola Superior de Tecnologia e Gestao, Leiria, Portugal ; Almeida da Silva, H.J.

Various digital modulation techniques have been extensively studied and have found numerous applications in wireless communication systems. One example of this success is the QPSK modulation used in the third generation Universal Mobile Telecommunication System (UMTS). This paper presents a new modulation method that produces less adjacent channel interference (ACI) and lower bit error rate (BER) than the QPSK modulation with linear amplification. We call this new modulation technique Soft Orthogonal Phase shift Keying (SOPK). This modulation is perfect for a new coding method OVSF-MAC that can at least duplicate the binary throughput in the UMTS down link channel.

Published in:

Personal, Indoor and Mobile Radio Communications, 2002. The 13th IEEE International Symposium on  (Volume:4 )

Date of Conference:

15-18 Sept. 2002