Title :
Analysis of compensation methods for OFDM implementation effects
Author :
Haas, Erik ; Schnell, Michael
Author_Institution :
Inst. of Commun. & Navigation, German Aerosp. Center - DLR, Wessling, Germany
Abstract :
The impact of implementation effects on the received signal quality in an orthogonal frequency division multiplexing (OFDM) system is investigated. This is done by taking into account the influence of hardware components, such as digital-to-analog (D/A) converters, amplifiers, filters and in-phase/quadrature (I/Q) modulator/demodulator. We focus on possible sources of errors in the signal generation and filtering process. Theoretical considerations are verified and demonstrated on a digital signal processing (DSP) system. Countermeasures to overcome the distortions resulting from the implementation effects are proposed and improvements of the received signal quality and the resulting bit error rate (BER) performance are shown.
Keywords :
OFDM modulation; digital-analogue conversion; error statistics; fast Fourier transforms; signal processing; BER; D/A converters; I/Q demodulator; I/Q modulator; OFDM implementation effects; amplifiers; bit error rate; compensation methods; digital signal processing; digital-to-analog converters; fast Fourier transform; filters; orthogonal frequency division multiplexing; received signal quality; signal generation; Bit error rate; Demodulation; Digital filters; Digital modulation; Digital signal processing; Filtering; Hardware; OFDM modulation; Signal generators; Signal processing;
Conference_Titel :
Wireless Personal Multimedia Communications, 2002. The 5th International Symposium on
Print_ISBN :
0-7803-7442-8
DOI :
10.1109/WPMC.2002.1088328