Performance of multi-level QAM with maximal ratio combining space diversity for land mobile radio communications

Author

Sampei, Seiichi ; Sunaga, Terumi

fYear

1990

fDate

6-9 May 1990

Firstpage

459

Lastpage

464

Abstract

A novel type of space diversity with maximal ratio combining for multilevel quadrature amplitude modulation (QAM) in land mobile communications to improve transmission performance is proposed. In order to realize maximal ratio combining space diversity for QAM, a novel type of diversity combining method using a pilot symbol insertion type fading estimator is applied. The proposed diversity combining is carried out at the baseband using digital signal processing, simplifying the diversity receiver hardware. Computer simulation and laboratory experiments confirm that the multilevel QAM using the proposed method is effective for improving the transmission performance of land mobile communications

Keywords

amplitude modulation; diversity reception; mobile radio systems; baseband; computer simulation; digital signal processing; diversity receiver; land mobile radio communications; maximal ratio combining space diversity; multilevel QAM; multilevel quadrature amplitude modulation; pilot symbol insertion type fading estimator; transmission performance; Baseband; Computer simulation; Digital signal processing; Diversity methods; Diversity reception; Fading; Hardware; Laboratories; Mobile communication; Quadrature amplitude modulation;

fLanguage

English

Publisher

ieee

Conference_Titel

Vehicular Technology Conference, 1990 IEEE 40th

Conference_Location

Orlando, FL

ISSN

1090-3038

Type

conf

DOI

10.1109/VETEC.1990.110365

Filename

110365