A Method of Constructing Phase Spreading Sequences for CPM‐CDMA Systems | Zendy

MORIOKA KAZUYUKI | Zendy; ASANO DAVID | Zendy

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A Method of Constructing Phase Spreading Sequences for CPM‐CDMA Systems

Author(s) -

MORIOKA KAZUYUKI,

ASANO DAVID

Publication year - 2015

Publication title -

electronics and communications in japan

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.131

H-Index - 13

eISSN - 1942-9541

pISSN - 1942-9533

DOI - 10.1002/ecj.11755

Subject(s) - code division multiple access , phase shift keying , spread spectrum , computer science , electronic engineering , modulation (music) , minimum shift keying , computer network , engineering , bit error rate , channel (broadcasting) , physics , acoustics

SUMMARY In this paper, a construction method for phase spreading sequences that is suitable for CPM‐CDMA systems is proposed. Using these sequences, the performance of asynchronous CPM‐CDMA systems with traditional BPSK/OQPSK‐CDMA systems and the trade‐off between the spreading factor and modulation parameters are considered. Numerical results show that the optimal modulation index for CPFSK‐CDMA systems is h = 0.5 and the performance is better for lower values ofB b T cin GMSK‐CDMA systems. Also, we found that the user capacities of MSK‐CDMA systems are 2.3 times larger than those of BPSK/OQPSK‐CDMA systems.

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