Analysis of bandpass Sigma-Delta conversion in OFDM systems

Author

Moschitta, Antonio ; Petri, Dario

Author_Institution

Dipt. di Ingegneria Elettronica e dell´´Informazione, Universita degli Studi di Perugia, Italy

Volume

3

fYear

2001

fDate

6/23/1905 12:00:00 AM

Firstpage

1387

Abstract

This paper analyzes the effect of analog-to-digital bandpass Sigma-Delta conversion on the performance of an Orthogonal Frequency Division Multiplexing (OFDM) receiver. OFDM systems and a related simulation model are briefly described. Sigma-Delta characteristics are optimized with respect to overall BER performance. The nonlinear effects of overload are investigated, and a comparison is made with PCM converters. It is shown that minimizing quantization noise power can lead to suboptimal results. A linear model has been developed to estimate the influence of quantization noise on BER performance and it has been validated by means of simulations. Finally a set of minimum performance requirements for Sigma-Delta converters is established

Keywords

OFDM modulation; circuit noise; circuit optimisation; error statistics; sigma-delta modulation; BER performance; OFDM systems; PCM converters; bandpass sigma-delta conversion analysis; direct digital modulation; linear model; minimum performance requirements; noise spectral shaping; nonlinear overload effects; orthogonal frequency division multiplexing receiver; quantization noise power; quantizer overload; simulation model; suboptimal results; AWGN; Delta-sigma modulation; Digital modulation; Distributed control; Distributed decision making; OFDM modulation; Performance analysis; Power system modeling; Quadrature amplitude modulation; Quantization;

fLanguage

English

Publisher

ieee

Conference_Titel

Electronics, Circuits and Systems, 2001. ICECS 2001. The 8th IEEE International Conference on

Print_ISBN

0-7803-7057-0

Type

conf

DOI

10.1109/ICECS.2001.957473

Filename

957473