Title :
On the performance of a higher order alphabet size in CDMA
Author :
Milstein, Laurence B. ; Lim, Myoung S.
Author_Institution :
Dept. of Electr. & Comput. Eng., California Univ., San Diego, La Jolla, CA, USA
Abstract :
Due to the desire for the next generation of wireless communications systems to be able to support higher data rate, multimedia, traffic, it is of interest to determine if the use of a higher order alphabet size, in conjunction with code division multiple access (CDMA) signaling, will allow enhanced performance. We compare the performance of an asynchronous CDMA system when a 16-QAM alphabet is used with that of a CDMA system employing QPSK as the modulation format.
Keywords :
code division multiple access; multimedia communication; quadrature amplitude modulation; quadrature phase shift keying; telecommunication signalling; telecommunication traffic; 16-QAM alphabet; CDMA signaling; QPSK; asynchronous CDMA system; code division multiple access; high data rate; higher order alphabet size; modulation format; multimedia traffic; system performance; wireless communications systems; AWGN; Constellation diagram; Delay effects; Modulation; Multiaccess communication; Multimedia systems; Probability; Quadrature phase shift keying; Rayleigh channels; Wireless communication;
Journal_Title :
Communications Letters, IEEE
DOI :
10.1109/4234.552141
