Title :
Analyze and Comment on Spectral Efficiency of VMSK Modulation
Author :
Shi, Zhiyong ; Huang, Jianming ; Zhang, Zhenyu ; Sang, Yalou
Author_Institution :
Chongqing Commun. Inst., Sichuan
Abstract :
In the recent decade, H. R. Walker and others presented a high spectral efficient modulation - VMSK. According to their analyses, VMSK modulation can reach 30 bit/s/Hz and even more simply without loss of SNR. In this paper, the waveform of VMSK is decomposed based on the time domain. The performance of VMSK is analyzed at signal power spectrum point. An example is given to show that the spectral efficiency of VMSK is not high as Walker and others described. Actually, VMSK does not realize the signal transmission with ultra-narrowband
Keywords :
minimum shift keying; time-domain analysis; VMSK modulation; high spectral efficient modulation; signal power spectrum point; signal transmission; spectral efficiency; time domain decomposition; very minimum shift keying; Amplitude modulation; Baseband; Constellation diagram; Digital modulation; Frequency; Modulation coding; Performance analysis; Phase modulation; Quadrature amplitude modulation; Signal analysis;
Conference_Titel :
Wireless Communications, Networking and Mobile Computing, 2006. WiCOM 2006.International Conference on
Conference_Location :
Wuhan
Print_ISBN :
1-4244-0517-3
DOI :
10.1109/WiCOM.2006.158
