Title :
An investigation of coded OFDM and OFDM-CDMA waveforms utilizing different modulation schemes on HF multipath/fading channels
Author_Institution :
Harris RF Commun., Rochester, NY, USA
fDate :
28 Aug.-2 Sept. 2005
Abstract :
Orthogonal frequency division multiplexing-code division multiple access (OFDM-CDMA) is a technique that has been used to improve the robustness of OFDM. For uncoded waveforms, OFDM-CDMA has been shown to offer some significant performance advantages over OFDM on multipath/fading channels (Nieto, 2004). A recent paper (Nieto, 2005) reported that this performance advantage was greatly reduced for coded and interleaved waveforms. However, the results presented were only for 2-ary phase shift keying (2-PSK) modulation. This paper extends this research by investigating the performance of coded OFDM and coded OFDM-CDMA waveforms utilizing higher-order modulation schemes on various HF multipath/fading channels.
Keywords :
OFDM modulation; code division multiple access; fading channels; interleaved codes; multipath channels; phase shift keying; 2-ary phase shift keying modulation; HF fading channels; HF multipath channels; code division multiple access; coded waveforms; interleaved waveform; modulation schemes; orthogonal frequency division multiplexing; Degradation; Fading; Frequency domain analysis; Hafnium; Modulation coding; Multiaccess communication; Multiuser detection; OFDM modulation; Reflection; Robustness;
Conference_Titel :
Circuit Theory and Design, 2005. Proceedings of the 2005 European Conference on
Print_ISBN :
0-7803-9066-0
DOI :
10.1109/ECCTD.2005.1523061
