A 1.9 GHz Si direct conversion receiver IC for QPSK modulation systems

Author

Takahashi, C. ; Fujimoto, R. ; Arai, S. ; Itakura, T. ; Ueno, T. ; Tsurumi, H. ; Tanimoto, H. ; Watanabe, S. ; Hirakawa, K.

Author_Institution

Res. & Dev. Center, Toshiba Corp., Kawasaki, Japan

fYear

1995

fDate

15-17 Feb. 1995

Firstpage

138

Lastpage

139

Abstract

This paper presents a possible BiCMOS solution for a direct conversion receiver (DCR) for QPSK communication systems such as personal handy-phone system (PHS). DCR chips reported are for constant-amplitude modulation systems such as FSK or GMSK. However, no DCR chip for QPSK systems has been reported yet,because a 2nd-order nonlinearity often strongly deteriorates a receiver sensitivity for QPSK systems. That is, amplitude modulation components in QPSK are converted down into spurious baseband signals, while FSK and/or GMSK systems do not suffer from 2nd-order nonlinearity. A DCR chip including an LNA is fabricated for a feasibility study of DCR for QPSK systems.

Keywords

radio receivers; 1.9 GHz; DCR chips; LNA; QPSK modulation systems; Si; amplitude modulation components; direct conversion receiver IC; personal handy-phone system; receiver sensitivity; second-order nonlinearity; spurious baseband signals; Attenuators; Band pass filters; Baseband; Bit error rate; Circuits; Distortion; Frequency shift keying; Impedance matching; Low-noise amplifiers; Quadrature phase shift keying;

fLanguage

English

Publisher

ieee

Conference_Titel

Solid-State Circuits Conference, 1995. Digest of Technical Papers. 41st ISSCC, 1995 IEEE International

Conference_Location

San Francisco, CA, USA

ISSN

0193-6530

Print_ISBN

0-7803-2495-1

Type

conf

DOI

10.1109/ISSCC.1995.535464

Filename

535464