Title :
Performance of a digital base-band predistorting amplifier linearizer implemented in fixed point DSPs
Author :
De Mingo, Jeslis ; Valdovinos, Antonio ; Ruiz, José
Author_Institution :
Dept. de Ingenieria Electron. y Commun., Zaragoza Univ., Spain
Abstract :
The application of digital predistortion in base-band signal is an extended method of amplifier linearization to reduce the adjacent channel interference (ACI) in those systems in which a varying envelope modulation scheme is used. This paper proposes a particular predistorter configuration and presents some design considerations and simulation results in relation to the use of fixed point digital signal processors (DSPs). Less than -60 dB out-of-band emission can be obtained for a narrow bandwidth system
Keywords :
adjacent channel interference; digital signal processing chips; fixed point arithmetic; linearisation techniques; adjacent channel interference; digital base-band predistorting amplifier linearizer; fixed point DSPs; narrow bandwidth system; out-of-band emission; varying envelope modulation scheme; Amplitude modulation; Digital modulation; Digital signal processing; Digital signal processors; Interchannel interference; Phase modulation; Predistortion; Pulse modulation; Signal processing; Table lookup;
Conference_Titel :
Electrotechnical Conference, 1998. MELECON 98., 9th Mediterranean
Conference_Location :
Tel-Aviv
Print_ISBN :
0-7803-3879-0
DOI :
10.1109/MELCON.1998.692481
