Matrix computations (3rd ed.)
OFDM for Wireless Multimedia Communications
OFDM for Wireless Multimedia Communications
Frequency domain equalization for single-carrier broadband wireless systems
IEEE Communications Magazine
Residual ISI cancellation for OFDM with applications to HDTV broadcasting
IEEE Journal on Selected Areas in Communications
Multiuser OFDM with adaptive subcarrier, bit, and power allocation
IEEE Journal on Selected Areas in Communications
Filtered multitone modulation for very high-speed digital subscriber lines
IEEE Journal on Selected Areas in Communications
Ov-OFDM: a reduced PAPR and cyclic prefix free multicarrier transmission system
ISWCS'09 Proceedings of the 6th international conference on Symposium on Wireless Communication Systems
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Block transmission systems using OFDM (orthogonal frequency domain multiplexing) are known for their computational efficiency in dealing with time dispersive, wireless channels. The efficiency relies primarily on data blocking by cyclic prefixing and on the exploitation of the eigenvalue decomposition of circulant channel matrices. Based on other blocking techniques and on other efficient matrix decompositions, further computationally efficient block transmission systems can be established. However, all these block transmission systems, including OFDM based systems, require the insertion of guard periods at the transmitter side, which unfavorably affects the spectral efficiency and the transmission power. We present overlapping methods that can efficiently avoid the insertion of guard periods in those systems. The measured bit error rates of the block transmission systems without guard periods are over a wide range of E"B/N"0 values similar to the respective systems with guard periods. Additionally, the systems with guard period require more transmission energy to reach a similar E"B/N"0 value at the receiver. The block processing is very similar for transmissions with and without guard periods, which can be reasonably exploited in a transceiver, capable to transmit and receive data blocks with and without guard periods.