Title :
Application of amplitude gain estimation techniques for multilevel modulation in OFDM systems
Author :
Prasetyo, B.Y. ; Aghvami, A.H.
Author_Institution :
Centre for Telecommun. Res., King´´s Coll., London, UK
Abstract :
In this paper the performance of feed-forward amplitude gain estimator techniques for orthogonal frequency division multiplexing (OFDM) utilising multilevel modulation is considered. Based on the split-symbol algorithm and the nonlinearity algorithm, the techniques operate on a number of frequency domain symbols in one OFDM symbol to estimate short term amplitude gain. Application of these techniques results in a efficient bandwidth transmission, reduced complexity system and, due to its feed-forward feature, a fast estimation period. The performance evaluation has been carried out by computer simulation over a frequency selective channel with AWGN, and compared for several estimation symbol lengths
Keywords :
AWGN channels; OFDM modulation; amplitude estimation; computational complexity; feedforward; land mobile radio; multipath channels; quadrature amplitude modulation; AWGN channels; OFDM symbol; OFDM systems; amplitude gain estimation techniques; efficient bandwidth transmission; estimation period; estimation symbol lengths; feed-forward; frequency domain symbols; frequency selective channel; multilevel modulation; nonlinearity algorithm; orthogonal frequency division multiplexing; performance; reduced complexity system; split-symbol algorithm; AWGN; Amplitude estimation; Amplitude modulation; Application software; Bandwidth; Feedforward systems; Frequency domain analysis; Frequency estimation; OFDM modulation; Performance gain;
Conference_Titel :
Personal, Indoor and Mobile Radio Communications, 1998. The Ninth IEEE International Symposium on
Conference_Location :
Boston, MA
Print_ISBN :
0-7803-4872-9
DOI :
10.1109/PIMRC.1998.734677
