[1]应鹏魁,吴乐南.一种新的MPPSK调制解调器实现结构[J].东南大学学报(自然科学版),2012,42(2):204-208.[doi:10.3969/j.issn.1001-0505.2012.02.002]
 Ying Pengkui,Wu Lenan.New scheme of MPPSK modem[J].Journal of Southeast University (Natural Science Edition),2012,42(2):204-208.[doi:10.3969/j.issn.1001-0505.2012.02.002]
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一种新的MPPSK调制解调器实现结构()
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《东南大学学报(自然科学版)》[ISSN:1001-0505/CN:32-1178/N]

卷:
42
期数:
2012年第2期
页码:
204-208
栏目:
信息与通信工程
出版日期:
2012-03-20

文章信息/Info

Title:
New scheme of MPPSK modem
作者:
应鹏魁 吴乐南
东南大学信息科学与工程学院,南京 210096
Author(s):
Ying Pengkui Wu Lenan
School of Information Science and Engineering, Southeast University, Nanjing 210096, China
关键词:
MPPSK调制 多路判决 同步 抽样 锁相环 功率谱
Keywords:
M-ary phase position shift keying(MPPSK)modulation multi-path discrimination synchronization sample phase locked loop power spectrum
分类号:
TN919.6
DOI:
10.3969/j.issn.1001-0505.2012.02.002
摘要:
为了简化多元位置相移键控(MPPSK)接收机的结构并提升其解调性能,给出了一种MPPSK调制器的实现结构,并提出了一种全新的基于冲击滤波多路判决的MPPSK解调器实现结构.该解调器结构先对冲击滤波器的输出信号取绝对值并进行低通滤波处理,再将得到的冲击包络通过由不同位同步信息控制的抽样判决器,将判决结果叠加,即可得到最终的符号序列.仿真结果表明,与基于锁相环的解调器结构相比,该解调器的结构更简单,解调性能更好.随着进制数的增大,MPPSK调制信号功率谱的边带线谱逐渐降低甚至消失,从而紧缩了信号功率谱,降低了邻道干扰,提高了频谱利用率.因此,在加性高斯白噪声信道条件下,该实现结构具有较强的应用优势.
Abstract:
In order to simplify the structure of the M-ary phase position shift keying(MPPSK)receiver and enhance the demodulation performance, an implementation scheme of the MPPSK modulator is proposed, and a novel scheme of the MPPSK demodulator which uses the multi-path discrimination based on the output of impacting filter is put forward. Firstly, for the output of the impacting filter, the absolute value is taken and the low-pass filtering is done. Secondly, the output envelope of the low-pass filter is put into sample discriminators controlled by different bit synchronization. Finally, the discriminator results are added and the final symbol sequence is obtained. The simulation results indicate that this scheme is simpler and the demodulation performance is better than that based on phase locked loop. With the increase of the hexadecimal number, the line spectrum components in the power spectrum of the MPPSK modulated signal become lower and even disappear, which tightens the power spectrum of the MPPSK modulated signal, reduces the adjacent-channel interference and improves the frequency spectrum utilization. Therefore, this implementation structure has a strong application advantage in the additive white Gaussian noise channel.

参考文献/References:

[1] 吴乐南.超窄带高速通信进展[J].自然科学进展,2007,17(11):1467-1473.
  Wu Lenan.UNB high-efficient communication progress[J].Progress in Natural Science,2007,17(11),1467-1473.(in Chinese)
[2] Wu Lenan,Feng Man,Qi Chenhao,et al.Recent patents on ultra narrow band modulations[J].Recent Patents on Signal Processing,2011,1(1):1-12.
[3] Qi Chenhao,Wu Lenan.PLL demodulation technique for M-ray position phase shift keying [J].Journal of Electronics:China,2009,26(3):289-295.
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备注/Memo

备注/Memo:
作者简介: 应鹏魁(1987—),男,硕士生; 吴乐南(联系人),男,博士,教授,博士生导师,wuln@seu.edu.cn.
基金项目: 国家高技术研究发展计划(863计划)资助项目(2008AA01Z227)、国家自然科学基金资助项目(60872075).
引文格式: 应鹏魁,吴乐南.一种新的MPPSK调制解调器实现结构[J].东南大学学报:自然科学版,2012,42(2):204-208. [doi:10.3969/j.issn.1001-0505.2012.02.002]
更新日期/Last Update: 2012-03-20