Title :
D2SA: a DPSK-based distributed sample acquisition for coherently demodulated MPSK/DS-CDMA systems
Author :
Kim, Byoung-Hoon ; Lee, Byeong Gi
Author_Institution :
GCT Semicond. Inc., Seoul, South Korea
fDate :
7/1/2001 12:00:00 AM
Abstract :
We present DPSK-based distributed sample acquisition (D2SA) as a novel variant of the distributed sample acquisition family for application to the M-ary phase-shift keying signaling direct-sequence code-division multiple-access systems. The D 2SA employs differentially coherent phase-shift keying (DPSK) to convey the shift register generator state samples and the prerotation of the data constellation to realize the coherent demodulation of the data stream. The use of DPSK instead of orthogonal modulation as the means of the state sample conveyance improves the system performance in terms of both system complexity and acquisition time
Keywords :
binary sequences; code division multiple access; demodulation; differential phase shift keying; land mobile radio; multiuser channels; phase shift keying; DPSK-based distributed sample acquisition; M-ary phase-shift keying signaling; acquisition time; coherent demodulation; coherently demodulated MPSK/DS-CDMA systems; data constellation prerotation; data stream; differentially coherent phase-shift keying; direct-sequence code-division multiple-access; distributed sample acquisition; mobile station; shift register generator state samples; state sample conveyance; system complexity; system performance; Correlators; Costs; Demodulation; Differential quadrature phase shift keying; Hardware; Logic; Multiaccess communication; Phase shift keying; Shift registers; System performance;
Journal_Title :
Communications, IEEE Transactions on
