Title :
Combined GMSK and 8PSK modulator for GSM and EDGE
Author :
Bode, Peter ; Lampe, Alexander ; Helfenstein, Markus
Author_Institution :
Philips Semicond., Nuremberg, Germany
Abstract :
An efficient digital GMSK/8PSK I/Q signal modulator for GSM/EDGE is presented. The solution is based on Laurent´s approximation of the non-linear GMSK modulator by a bank of linear, pre-encoded modulators, thus enabling burst shaping in the I/Q domain and therefore solving the problem of power ramping. The solution is compatible to all major transmitter architectures offering an I/Q interface.
Keywords :
3G mobile communication; cellular radio; digital radio; minimum shift keying; modulators; phase shift keying; radio transmitters; EDGE; GSM; Laurent´s approximation; burst shaping; combined GMSK/8PSK modulator; digital I/Q signal modulator; nonlinear GMSK modulator; power ramping; transmitter architectures; Binary phase shift keying; Bit rate; Communication standards; Data communication; Digital modulation; Frequency; GSM; Mobile communication; Phase modulation; Transmitters;
Conference_Titel :
Circuits and Systems, 2003. ISCAS '03. Proceedings of the 2003 International Symposium on
Print_ISBN :
0-7803-7761-3
DOI :
10.1109/ISCAS.2003.1205094
