Title :
A signal design without co-channel interference for approximately synchronized CDMA systems
Author_Institution :
Inst. of Appl. Phys., Tsukuba Univ., Ibaraki, Japan
fDate :
6/1/1994 12:00:00 AM
Abstract :
A signal design is proposed for a CDMA system that is approximately synchronized. The signals are called pseudoperiodic sequences. The set of pseudoperiodic polyphase sequences are introduced from a set of periodic polyphase sequences with ideal autocorrelation for small shifts and zero cross correlation for all shifts. The system works without cochannel interference, even when the signals are modulated by data
Keywords :
cellular radio; code division multiple access; correlation theory; radiofrequency interference; signal processing; synchronisation; approximately synchronized systems; autocorrelation; cochannel interference; cross correlation; periodic polyphase sequences; pseudoperiodic polyphase sequences; pseudoperiodic sequences; signal design; Autocorrelation; Base stations; Broadcasting; Interchannel interference; Linearity; Matched filters; Multiaccess communication; Physics; Signal design; Signal processing;
Journal_Title :
Selected Areas in Communications, IEEE Journal on
