Anti-Multipath Performance Improvement of an M-ary Position Phase Shift Keying Modulation System
Anti-Multipath Performance Improvement of an M-ary Position Phase Shift Keying Modulation System
复制标题
多位相移键控调制系统的抗多径性能改进
DOI:
10.3390/s19081938
复制
发表时间:
2019-04
期刊:
影响因子:
3.9
通讯作者:
Tian Hongxian
中科院分区:
文献类型:
--
作者:
Wang Haiyuan;Tian Hongxian
Low-Power Wide-Area Network (LPWAN) is the technology that the Internet-of-Things (IoT) uses in long-distance, wide-coverage scenarios. As one of the ultra-narrowband (UNB) modulation techniques, M-ary position phase shift keying (MPPSK) modulation can provide high coverage and high reliability for LPWAN. This paper proposes a multipath separation method based on MPPSK modulation, which aims to eliminate the influence of multipath on the main path without increasing the spectrum overhead and system complexity. Specifically, the modulation parameter of the system is adjusted according to the delay value, so that the phase jump of the multipath signal falls outside the phase jump of the main path symbol to achieve separation of the multipath from the main path. Moreover, a normalized symbol joint decision method is proposed in order to reduce the introduced noise while using multipath information for decisions. The simulation results indicate that the multipath separation conditions given in this paper can meet the requirements of multipath separation of MPPSK signals. Compared with the existing mainstream decision scheme, the normalized symbol joint decision improves the demodulation performance of the system.
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DOI:
10.1017/cbo9780511841224
发表时间:
2005-08
期刊:
--
影响因子:
--
作者:
A. Goldsmith
通讯作者:
A. Goldsmith
DOI:
10.1109/csndsp.2014.6923892
发表时间:
2014-07
期刊:
2014 9th International Symposium on Communication Systems, Networks & Digital Sign (CSNDSP)
影响因子:
--
作者:
Cong Lu;Lenan Wu;Peng Chen
通讯作者:
Cong Lu;Lenan Wu;Peng Chen
影响因子:
2.9
作者:
Feng, Man;Wu, Lenan;Gao, Peng
通讯作者:
Gao, Peng
DOI:
10.1109/glocom.2005.1577037
发表时间:
2005
期刊:
GLOBECOM '05. IEEE Global Telecommunications Conference, 2005.
影响因子:
--
作者:
A. Jamalipour;N. Ansari;M. Howlader;Chengshan Xiao
通讯作者:
A. Jamalipour;N. Ansari;M. Howlader;Chengshan Xiao
影响因子:
2.9
作者:
Feng, Man;Wu, Lenan
通讯作者:
Wu, Lenan