Title :
High Rank Modulation Investigation for PO-CI/MC-CDMA Systems
Author :
Zhang, Yanyan ; Zhao, Yang ; Ge, Liang ; Tao, Xiaofeng
Author_Institution :
Wireless Technol. Innovation Inst., Beijing Univ. of Posts & Telecommun., Beijing
Abstract :
Although pseudo-orthogonal carrier interferometry (PO-CI) multi-carrier code division multiple access (MC-CDMA) could transmit doubled data streams, it highly depends on the modulation type. Through theoretical inter-code interference analysis, this paper puts forward that PO-CI/MC-CDMA systems could be de-spread ideally only with BPSK modulation. When complex modulation types are considered, PO-CI/MC-CDMA fails in de-spreading while simulation results of QPSK and QAM demonstrate this limitation. However, pulse amplitude modulations (PAMs) are found to be more suitable for the systems. The acceptable bit error rate (BER) performance of high rank PAMs is revealed by simulation too. Therefore, if the spectrum efficiency requisition is high, PAM is proposed to be the optimal modulation type for PO-CI/MC-CDMA systems.
Keywords :
code division multiple access; error statistics; interference (signal); phase shift keying; pulse amplitude modulation; BPSK modulation; PO-CI/MC-CDMA systems; bit error rate; doubled data streams; high rank modulation investigation; inter-code interference analysis; multicarrier code division multiple access; pseudo-orthogonal carrier interferometry; pulse amplitude modulations; Amplitude modulation; Binary phase shift keying; Bit error rate; Interference; Interferometry; Modulation coding; Multicarrier code division multiple access; Pulse modulation; Quadrature amplitude modulation; Quadrature phase shift keying;
Conference_Titel :
Vehicular Technology Conference, 2008. VTC 2008-Fall. IEEE 68th
Conference_Location :
Calgary, BC
Print_ISBN :
978-1-4244-1721-6
Electronic_ISBN :
1090-3038
DOI :
10.1109/VETECF.2008.213
