Design of a QPSK/16 QAM LMDS downstream receiver ASIC chip

Author

Park, Ki H. ; Shin, Dae K. ; Lee, Jun S. ; Sunwoo, Myung H.

Author_Institution

Dept. of Electron. Eng., Ajou Univ., Suwon, South Korea

fYear

2000

fDate

2000

Firstpage

210

Lastpage

217

Abstract

This paper presents a QPSK/16 QAM LMDS (local multipoint distribution services) downstream receiver ASIC chip. The proposed LMDS chip consists of a blind equalizer, a timing recovery block and a carrier recovery block. The blind equalizer uses a DFE (decision feedback equalizer) structure using CMA (constant modulus algorithm). The symbol timing recovery uses the modified parabolic interpolator and the decision-directed carrier recovery is used to remove the carrier frequency offset, phase offset and phase jitter. The implemented LMDS receiver can support four data rates, 10, 20, 30 and 40 Mbps and can accommodate the symbol rate up to 10 Mbaud. This symbol rate is faster than existing QAM receivers

Keywords

application specific integrated circuits; blind equalisers; broadband networks; decision feedback equalisers; digital radio; integrated circuit design; interpolation; jitter; quadrature amplitude modulation; quadrature phase shift keying; radio access networks; radio receivers; synchronisation; 10 Mbit/s; 20 Mbit/s; 30 Mbit/s; 40 Mbit/s; CMA; DFE structure; LMDS receiver; QAM receivers; QPSK/16 QAM LMDS; blind equalizer; broadband wireless system; carrier frequency offset; carrier recovery block; constant modulus algorithm; data rates; decision feedback equalizer; decision-directed carrier recovery; downstream receiver ASIC chip; local multipoint distribution services; millimeter-wave broadband access service; modified parabolic interpolator; phase jitter; phase offset; point-to-multipoint communication system; symbol rate; symbol timing recovery; timing recovery block; Application specific integrated circuits; Blind equalizers; Decision feedback equalizers; Frequency; Jitter; Mobile communication; Multimedia communication; Quadrature amplitude modulation; Quadrature phase shift keying; Timing;

fLanguage

English

Publisher

ieee

Conference_Titel

Signal Processing Systems, 2000. SiPS 2000. 2000 IEEE Workshop on

Conference_Location

Lafayette, LA

ISSN

1520-6130

Print_ISBN

0-7803-6488-0

Type

conf

DOI

10.1109/SIPS.2000.886718

Filename

886718