π/4-shift QPSK digital modulator LSIC for personal communication terminals

Author

Sakata, Tetsu ; Seki, Kazuhiko ; Kubota, Shuji ; Kato, Shuzo

Author_Institution

NTT Radio Commun. Syst. Labs., Kanagawa, Japan

fYear

1994

fDate

18-23 Sep 1994

Firstpage

472

Abstract

A π/4-shift QPSK digital modulator LSIC consisting of a digital pulse shaping filter and a baseband quadrature modulator is newly developed. By employing a novel digital filter configuration, the required filter memory is reduced to just 1/2048th that of the conventional modulator. Moreover, since the proposed baseband modulation scheme does not employ a complex multiplier or a quadrature modulator with multipliers, a compact and low power consumption modulator is realized

Keywords

CMOS digital integrated circuits; digital filters; large scale integration; modulators; personal communication networks; pulse shaping circuits; quadrature phase shift keying; telecommunication terminals; π/4-shift QPSK digital modulator; CMOS; LSI; baseband quadrature modulator; digital pulse shaping filter; filter memory; low power consumption; personal communication terminals; Baseband; Digital filters; Digital modulation; Energy consumption; Phase modulation; Pulse modulation; Pulse shaping methods; Quadrature phase shift keying; Shape control; Shift registers;

fLanguage

English

Publisher

ieee

Conference_Titel

Personal, Indoor and Mobile Radio Communications, 1994. Wireless Networks - Catching the Mobile Future., 5th IEEE International Symposium on

Conference_Location

The Hague

Print_ISBN

90-5199-193-2

Type

conf

DOI

10.1109/WNCMF.1994.529134

Filename

529134