Title :
A Single Sideband RF-Modulator for Digital-IF Transmitter
Author :
Seo, Hae-Moon ; Park, Yong-Kuk ; Kim, Dong-Sun ; Lee, Youn-sung ; Park, Woo-Chool ; Lee, Myung-Soo ; Choi, Pyung
Author_Institution :
Ubiquitous Comput. Center, Korea Electron. Technol. Inst. (KETI), Sungnam
Abstract :
The limitation of the single-sideband rejection ratio (SSRR) performance of transmitters based on I/Q mismatching due to high frequency signals has been investigated. The proposed single-sideband radio frequency-modulator (SSM) is capable of generating a single sideband frequency without implementing a quadrature local oscillator which displaces a phase of a local oscillating signal by 90deg at a high frequency. This technique is promising for radio transmission with a SSRR of more than 60 dBc. Also, the architecture of digital-intermediate frequency transmitter using the proposed SSM can be applied for a future software-defined radio solution supporting multiband and multimode wireless communications.
Keywords :
modulators; radio transmitters; I/Q mismatching; digital-IF transmitter; digital-intermediate frequency transmitter; high frequency signals; multimode wireless communications; single sideband RF-modulator; single-sideband radio frequency-modulator; single-sideband rejection ratio; Amplitude modulation; Filters; Helium; Local oscillators; RF signals; Radio frequency; Radio transmitters; Signal generators; Ubiquitous computing; Wireless communication; Digital intermediate frequency (IF); sideband rejection ratio; single sideband modulation (SSM); transmitter;
Journal_Title :
Microwave and Wireless Components Letters, IEEE
DOI :
10.1109/LMWC.2008.2007713
