Title :
A CORDIC-based multicarrier QAM modulator
Author :
Vankka, Jouko ; Kosunen, Marko ; Hubach, Jan ; Halonen, Kari
Author_Institution :
Electron. Circuit Design Lab., Helsinki Univ. of Technol., Espoo, Finland
Abstract :
A multicarrier QAM modulator has been developed and implemented with programmable logic devices (PLDs). The multicarrier QAM modulator contains four CORDIC based QAM modulators. A conventional QAM modulator needs two multipliers, one adder and sine/cosine ROMs. The designed CORDIC based QAM modulator has about the same logic complexity as the two multipliers and the adder with the same word sizes. The multicarrier QAM modulator was designed to fulfil the spectrum and the error vector magnitude (EVM) specification of the wideband code division multiple access (WCDMA) system
Keywords :
FIR filters; code division multiple access; digital arithmetic; linear phase filters; modulators; programmable logic devices; quadrature amplitude modulation; signal processing; CORDIC-based multicarrier QAM modulator; FIR filter; WCDMA system; adder; error vector magnitude specification; linear phase filter; logic complexity; multipliers; programmable logic devices; sine/cosine ROM; wideband code division multiple access; word sizes; Adders; Amplitude modulation; Electronic circuits; Frequency; Multiaccess communication; Power amplifiers; Power harmonic filters; Pulse modulation; Quadrature amplitude modulation; Wideband;
Conference_Titel :
Global Telecommunications Conference, 1999. GLOBECOM '99
Conference_Location :
Rio de Janeireo
Print_ISBN :
0-7803-5796-5
DOI :
10.1109/GLOCOM.1999.831630
