Title :
Digital signal processing engine design for polar transmitter in wireless communication systems
Author :
Ko, Hung-Yang ; Wang, Yi-Chiuan ; Wu, An-Yeu
Author_Institution :
Graduate Inst. of Electron. Eng., Nat. Taiwan Univ., Taipei, Taiwan
Abstract :
Polar modulation techniques offer the capability of multimode wireless systems and the potential for a high efficiency power amplifier (PA). This paper describes a new design of digital signal processing (DSP) engine for the polar transmitter. The digital part includes a rectangular-to-polar converter and digital phase modulator, and the engine is designed for the EDGE (2.5G) system. We employ the coordinate rotation digital computer (CORDIC) and direct digital frequency synthesizer (DDFS) techniques in our design. A prototype chip has been designed and fabricated in the UMC 0.18 μm CMOS process with 1P6M technology.
Keywords :
CMOS integrated circuits; digital signal processing chips; direct digital synthesis; mobile radio; phase modulation; radio transmitters; 0.18 micron; CMOS; CORDIC; DDFS; DSP; EDGE 2.5G system; coordinate axis converter; coordinate rotation digital computer; digital phase modulator; digital signal processing engine; direct digital frequency synthesizer; high efficiency power amplifiers; multimode wireless communication systems; polar modulation; polar transmitter; rectangular-to-polar converter; Digital signal processing; Digital signal processing chips; Engines; Frequency synthesizers; High power amplifiers; Phase modulation; Process design; Signal design; Transmitters; Wireless communication;
Conference_Titel :
Circuits and Systems, 2005. ISCAS 2005. IEEE International Symposium on
Print_ISBN :
0-7803-8834-8
DOI :
10.1109/ISCAS.2005.1466013
