Title :
Spectrally efficient modulation and spreading scheme for CDMA systems
fDate :
11/12/1998 12:00:00 AM
Abstract :
A novel modulation and spreading scheme is proposed based on the orthogonal complex rotator that outperforms the traditional PN (pseudo noise) complex QPSK method in terms of adjacent channel power. This scheme is important for hand-held terminals because it increases battery life and capacity due to reduced interference. A mathematical analysis and adjacent channel power simulation results are provided and discussed
Keywords :
adjacent channel interference; code division multiple access; quadrature phase shift keying; spread spectrum communication; CDMA system; adjacent channel power simulation; battery capacity; battery life; hand-held terminal; interference; orthogonal complex QPSK modulation; spectral efficiency; spreading;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:19981570
