Title :
Comparison of direct-sequence spread-spectrum multiple-access systems with QPSK data modulation
Author :
Macdonald, Thomas G. ; Pursley, Michael B.
Author_Institution :
Dept. of Electr. & Comput. Eng., Clemson Univ., SC, USA
fDate :
6/21/1905 12:00:00 AM
Abstract :
Two forms of quaternary direct sequence spread-spectrum multiple access, also known as code-division multiple access (CDMA), are described and evaluated. One form uses complex quaternary sequences as the spreading sequences, and the corresponding receiver employs a complex correlator and complex processing. The other form uses a pair of binary Gold sequences as the spreading sequences and the receiver employs in-phase and quadrature processing. The probability of symbol error is evaluated for each system
Keywords :
binary sequences; code division multiple access; error statistics; quadrature phase shift keying; receivers; spread spectrum communication; CDMA; QPSK data modulation; binary Gold sequences; code-division multiple access; complex correlator; complex processing; complex quaternary sequences; direct-sequence spread-spectrum multiple-access systems; in-phase processing; quadrature processing; receiver; spreading sequences; symbol error probability; Binary sequences; Gold; Modulation coding; Multiaccess communication; Multiple access interference; Phase measurement; Quadrature phase shift keying; Signal generators; Spread spectrum communication; Time measurement;
Conference_Titel :
Military Communications Conference Proceedings, 1999. MILCOM 1999. IEEE
Conference_Location :
Atlantic City, NJ
Print_ISBN :
0-7803-5538-5
DOI :
10.1109/MILCOM.1999.822745
