Title :
Digital baseband Cartesian loop transmitter
Author :
Mann, S.I. ; Beach, M.A. ; Morris, K.A.
Author_Institution :
Centre for Commun. Res., Bristol Univ., UK
fDate :
10/25/2001 12:00:00 AM
Abstract :
A novel approach to the Cartesian loop transmitter where the baseband circuitry is replaced with digital signal processing is discussed. The technique eliminates the need for an analogue phase shifter, and simplifies the hardware architecture. Performance results show a 20 dB reduction of the power amplifier intermodulation distortion for a π/4-DQPSK, 18 Kbaud signal
Keywords :
feedback; intermodulation distortion; linearisation techniques; phase shift keying; radio transmitters; signal processing; π/4-DQPSK signal; Cartesian loop transmitter; DSP; amplifier intermodulation distortion; digital baseband transmitter; digital signal processing; power amplifier IMD; power amplifier linearisation; stability;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:20010903
