多载波PSWFs-CPM联合调制信号设计与分析

doi:10.12305/j.issn.1001-506X.2021.10.36

Abstract

Abstract:

Continuous phase modulation (CPM) signal has the advantages of constant envelope characteristics, higher power efficiency, etc., and the multi-carries modulation and demodulation system based on the prolate spheroidal wave functions (PSWFs) signal has high spectral efficiency. Combining CPM technology and multi-carriers modulation method based on PSWFs signal, a signal model of multi-carriers modulation based on PSWFs with CPM (MCM-PSWFs-CPM) model is proposed. The power spectral density (PSD) characteristics, peak to average power ratio (PAPR), and bit error ratio (BER) performance of the signal are analyzed. The simulation results show that compared with the existing PSWFs-based multi-carriers modulation and demodulation system, the out-of-band attenuation of the signal power spectrum obtained by this model relatively faster, when the number of carriers is 64 and the complementary cumulative distribution function (CCDF) is 10^-3, the PAPR can be effectively reduced by about 2.70 dB, using multi-symbol detection (MSD) method can obtain better demodulation gain, and as the number of symbols increases, the detection performance is better, but the detection complexity will increase accordingly.

Key words: prolate spheroidal wave functions, continuous phase modulation, joint modulation, peak to average power ratio (PAPR)

CLC Number:

TN914.3

Dawei YANG, Hongxing WANG, Lei ZHANG, Chuanhui LIU, Jiafang KANG. Design and analysis of multi-carriers PSWFs-CPM joint modulation signal[J]. Systems Engineering and Electronics, 2021, 43(10): 3000-3007.

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References 32

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名称	数值
进制数M	2
PSWFs时间带宽积c/(Hz·s)	70、36
载波数	64、32
时间周期T/s	0.02
过采样点倍数	128
多符号检测周期D	3、5、7
PSWF产生方式	DPSS^[26]
调制方式	基带

调制方式(载波数为64)	PAPR
调制方式(载波数为64)	MCM-PSWFs-PAM	MCM-PSWFs-BPSK	MCM-PSWFs-CPM (h=0.5)
CCDF=10^-3	12.70	12.60	10.00
PAPR降低值	-	-	2.70

调制方式(载波数为64)	PAPR
调制方式(载波数为64)	MCM-PSWFs-CPM (h=0.75)	MCM-PSWFs-CPM (h=2/3)	MCM-PSWFs-CPM (h=4/7)	MCM-PSWFs-CPM (h=0.25)
CCDF=10^-3	11.60	11.40	10.70	11.60
PAPR降低值	1.10	1.30	2.00	1.10

调制方式	MCM-PSWFs-PAM (载波数为64)	MCM-PSWFs-CPM (载波数为64, h=0.5)	MCM-PSWFs-PAM (载波数为32)	MCM-PSWFs-CPM (载波数为32, h=0.5)
CCDF=10^-3	12.70	10.00	12.20	9.80
PAPR降低值	-	2.70	-	2.40

调制方式	算法复杂度
MCM-PSWFs-PAM	O_PSWFs+O(2nN+n)
MCM-PSWFs-BPSK	O_PSWFs+O(2n(N+1))
MCM-PSWFs-CPM(差分)	O_PSWFs+O(2nN+8n+3)
MCM-PSWFs-CPM(相关)	O_PSWFs+O(2nN+7n+1)
MCM-PSWFs-CPM(MSD)	O_PSWFs+O(2nN+10n+D2^D/2)

Design and analysis of multi-carriers PSWFs-CPM joint modulation signal

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