A new PLL synthesizer for fast FH spread spectrum communications

Author

Kajihara, Akihiro ; Nakagawa, Masao

Author_Institution

Dept. of Electr. Eng., Keio Univ., Yokohama, Japan

fYear

1989

fDate

27-30 Nov 1989

Firstpage

1602

Abstract

A phase-locked loop synthesizer for fast frequency-hopped spread-spectrum (SS-FH) communications is proposed. This synthesizer is composed of digital signal processing components except for the voltage-controlled oscillator (VCO). The phase-error signal between a reference signal and a feedback signal (VCO output) is derived by the subtraction of those phase components. The low-pass filter employed in conventional PLL synthesizers is not needed because harmonics and nonlinear distortions do not appear at the phase detector. Therefore, this synthesizer is able to have about about a 10³~10⁴ time faster hopping speed and produce more stable frequencies than conventional PLL synthesizers

Keywords

frequency agility; frequency synthesizers; phase-locked loops; spread spectrum communication; PLL synthesizers; VCO; digital signal processing; fast FH spread spectrum communications; feedback signal; low-pass filter; phase-error signal; phase-locked loop synthesizer; reference signal; voltage-controlled oscillator; Digital signal processing; Frequency synthesizers; Low pass filters; Nonlinear distortion; Output feedback; Phase detection; Phase locked loops; Power harmonic filters; Spread spectrum communication; Voltage-controlled oscillators;

fLanguage

English

Publisher

ieee

Conference_Titel

Global Telecommunications Conference and Exhibition 'Communications Technology for the 1990s and Beyond' (GLOBECOM), 1989. IEEE

Conference_Location

Dallas, TX

Type

conf

DOI

10.1109/GLOCOM.1989.64216

Filename

64216