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

作者：Morioka Kazuyuki^*; Asano David

来源：Electronics and Communications in Japan, 2015, 98(12): 7-16.

DOI：10.1002/ecj.11755

• continuous phase modulation
• continuous phase frequency shift keying
• minimum shift keying
• Gaussian minimum shift keying
• code division multiple access
• phase spreading sequence

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 of BbTc in 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.

• 出版日期2015-12