Fast adaptive equalizers for narrow-band TDMA mobile radio

Author

D´aria, Giovanna ; Piermarini, Roberto ; Zingarelli, Valerio

Author_Institution

Centro Studi e Lab. Telecommun., Torino, Italy

Volume

40

Issue

2

fYear

1991

fDate

5/1/1991 12:00:00 AM

Firstpage

392

Lastpage

404

Abstract

It is pointed out that the future European cellular digital mobile radio system in the 900 MHz band adopts a narrowband time division multiple access (TDMA) scheme with Gaussian minimum-shift keying (GMSK) modulation and burst type transmission. Consequently, very fast adaptation methods are necessary to cope with the time- and frequency-selective distortions produced by Rayleigh and multipath fading. The authors examine a few theoretical aspects of the application of recursive least squares (RLS) adaptation algorithms to the narrowband TDMA mobile radio system and give the relevant performance results for the fast Kalman algorithm, which turns out to be suitable for the considered application. In particular, signature curves, bit error rate, speed of convergence, steady-state behavior, numerical stability, required accuracy, and hardware complexity are discussed. Linear transversal and nonlinear decision-feedback equalizers are considered

Keywords

cellular radio; digital radio systems; equalisers; minimum shift keying; radiotelephony; time division multiple access; 900 MHz; European cellular digital mobile radio; GMSK modulation; Gaussian minimum-shift keying; RLS adaptation algorithms; Rayleigh fading; UHF; adaptive equalizers; bit error rate; burst type transmission; cellular radio; convergence speed; fast Kalman algorithm; fast adaptation; frequency-selective distortions; hardware complexity; linear transversal equalisers; multipath fading; narrowband TDMA; narrowband time division multiple access; nonlinear decision-feedback equalizers; numerical stability; radiotelephony; signature curves; steady-state behavior; time-selective distortion; Adaptive equalizers; Digital modulation; Frequency; Land mobile radio; Least squares methods; Narrowband; Nonlinear distortion; Rayleigh channels; Resonance light scattering; Time division multiple access;

fLanguage

English

Journal_Title

Vehicular Technology, IEEE Transactions on

Publisher

ieee

ISSN

0018-9545

Type

jour

DOI

10.1109/25.289420

Filename

289420