A wideband phase modulation technique adopting Fractional-N Direct Digital Frequency Synthesizer

Author

Bohai Zhang ; Fei You ; Renbin Tong ; Songbai He

Author_Institution

Sch. of Electron. Eng., Univ. of Electron. Sci. & Technol. of China, Chengdu, China

fYear

2014

fDate

19-23 Jan. 2014

Firstpage

214

Lastpage

216

Abstract

In this paper, an open-loop phase modulator, called Fractional-N Direct Digital Frequency Synthesizer (DDFS), for polar transmitter is proposed to resolve the limited bandwidth problem occurred in the traditional phase-locked loop (PLL)-based phase modulator. Besides, an effective noise shaping quantization method is taken into account to attenuate the fractional-spurs introduced by Fractional-N DDFS. The worst case RMS EVM per burst of the modulator is 0.32% when performing 10-Mbps 16PSK.

Keywords

direct digital synthesis; phase locked loops; phase shift keying; quantisation (signal); radio transmitters; 16PSK; DDFS; PLL; bit rate 10 Mbit/s; fractional-N direct digital frequency synthesizer; fractional-spurs; limited bandwidth problem; noise shaping quantization; open-loop phase modulator; phase locked loop; polar transmitter; wideband phase modulation; Bandwidth; Frequency modulation; Frequency synthesizers; Phase modulation; Quantization (signal); Transmitters; Fractional-N Direct Digital Frequency Synthesizer; polar transmitter; successive requantizer; wideband phase modulation;

fLanguage

English

Publisher

ieee

Conference_Titel

Radio and Wireless Symposium (RWS), 2014 IEEE

Conference_Location

Newport Beach, CA

Print_ISBN

978-1-4799-2298-7

Type

conf

DOI

10.1109/RWS.2014.6830083

Filename

6830083