Title :
A modified IJF-OQPSK modulation technique
Author :
Lin, Fuhua ; Song, Tiecheng ; Jiang, Shaojie
Author_Institution :
Dept. of Radio Engng., Southeast Univ., Nanjing, China
Abstract :
The IJF-OQPSK modulation technique achieves good spectral efficiency in digital communication systems. In this paper, an improved modulation technique called Modified Intersymbol-Interference and Jitter Free OQPSK (MIJF-OQPSK) is presented. Comparing with IJF-OQPSK, the MIJF-OQPSK obtains more superior property: the power spectral roll-off out-of-band is lower than 15 dB; the envelope fluctuation of the modulated signal amplitude drops down to 1.3 dB; and the spectral spreading is smaller in hard-limited channels
Keywords :
digital radio; digital signals; fluctuations; military communication; quadrature phase shift keying; radio spectrum management; telecommunication channels; digital communication systems; envelope fluctuation; hard-limited channels; intersymbol interference free OQPSK; jitter free OQPSK; modulation technique; power spectral roll-off; spectral efficiency; spectral spreading; Amplitude modulation; Digital communication; Digital modulation; Fluctuations; High power amplifiers; Jitter; Phase modulation; Pulse amplifiers; Quadrature phase shift keying; Random sequences;
Conference_Titel :
Military Communications Conference, 1993. MILCOM '93. Conference record. Communications on the Move., IEEE
Conference_Location :
Boston, MA
Print_ISBN :
0-7803-0953-7
DOI :
10.1109/MILCOM.1993.408682
