Title :
Linear amplification technique for digital mobile communications
Author :
Nagata, Yoshinori
Author_Institution :
NEC Corp., Kawasaki-City, Japan
Abstract :
The author proposes a novel predistortion linearizer which can meet the power-amplification requirements of digital mobile radio systems with high power efficiency and low out-of-band emission. This method can be used for narrowband mobile radio systems. It has been shown that the linearizer can achieve low-out-of-band emission under frequent changes of the amplifier nonlinearity. It is indicated that the hardware volume and the power consumption can be reduced sufficiently to make this predistortion linearizer applicable to mobile station transmitters. Nearly -60dB out-of-band emission and 33% power efficiency were obtained, which is comparable to corresponding results for a class C amplifier
Keywords :
digital radio systems; mobile radio systems; power amplifiers; 33 percent; digital mobile communications; digital mobile radio; high power efficiency; linear amplification technique; low out-of-band emission; mobile station transmitters; narrowband mobile radio; predistortion linearizer; Broadband amplifiers; Digital modulation; High power amplifiers; Interference; Mobile communication; Narrowband; Nonlinear distortion; Power amplifiers; Predistortion; Radio transmitters;
Conference_Titel :
Vehicular Technology Conference, 1989, IEEE 39th
Conference_Location :
San Francisco, CA
DOI :
10.1109/VETEC.1989.40066
