Precoded and vector OFDM robust to channel spectral nulls and with reduced cyclic prefix length in single transmit antenna systems.

The performance of orthogonal frequency-division multiplexing (OFDM) systems may be degraded when intersymbol interference (ISI) channels have spectral nulls. Also, when ISI channels have many taps, the data rate overhead due to the insertion of the cyclic prefix is high. We first propose a precoded...

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Detalles Bibliográficos
Publicado en:	IEEE Transactions on communications 49, 8 (2001).
Autor principal:	Xiang-Gen Xia
Formato:	Artículo
Lenguaje:	English
Materias:	ISI channels. VOFDM systems. Channel spectral nulls robustness. Coherent demodulation. Coherent modulation. Data rate overhead. Differential demodulation. Differential modulation. Information symbols. Intersymbol interference. Noncoherent demodulation. Noncoherent modulation. Orthogonal frequency-division multiplexing. Performance. Performance analysis. Precoded OFDM system. Reduced cyclic prefix length. Simulation results. Single transmit antenna systems. Unitary matrix modulation. Vector OFDM.