TY - GEN
T1 - Truncating and oversampling OFDM signals in white Gaussian noise channels
AU - Ozan, Waseem
AU - Jamieson, Kyle
AU - Darwazeh, Izzat
N1 - Funding Information:
The research leading to these results has received funding from the European Research Council under the European Unions Seventh Framework Programme (FP/2007-2013) / ERC Grant Agreement no. 279976. We are grateful to UCL for funding Waseem Ozans PhD studies. The authors would like to thank Mr. Tongyang Xu of University College London for his assistance in the Sphere Decoder design and his helpful comments on this work
Publisher Copyright:
© 2016 IEEE.
PY - 2016/9/21
Y1 - 2016/9/21
N2 - This work introduces a modified version of the orthogonal frequency division multiplexing (OFDM) signal by truncating OFDM symbols in the time domain. Sub-carriers are no longer orthogonally packed in the frequency domain as time samples are only partially transmitted, leading to improved spectral efficiency. In this work, mathematical expressions are derived for the newly proposed Truncated OFDM (TOFDM) signal, followed by interference analysis and performance comparisons. We also consider optimal and practical decoder architectures. Results from a Sphere Decoder-based decoder indicate that truncation length can significantly affect the error performance. With short truncation length, using a purpose designed detector, signals can be recovered even with truncated symbol transmission.
AB - This work introduces a modified version of the orthogonal frequency division multiplexing (OFDM) signal by truncating OFDM symbols in the time domain. Sub-carriers are no longer orthogonally packed in the frequency domain as time samples are only partially transmitted, leading to improved spectral efficiency. In this work, mathematical expressions are derived for the newly proposed Truncated OFDM (TOFDM) signal, followed by interference analysis and performance comparisons. We also consider optimal and practical decoder architectures. Results from a Sphere Decoder-based decoder indicate that truncation length can significantly affect the error performance. With short truncation length, using a purpose designed detector, signals can be recovered even with truncated symbol transmission.
KW - Multicarrier modulation
KW - SEFDM
KW - Truncated OFDM
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U2 - 10.1109/CSNDSP.2016.7573986
DO - 10.1109/CSNDSP.2016.7573986
M3 - Conference contribution
AN - SCOPUS:84991711120
T3 - 2016 10th International Symposium on Communication Systems, Networks and Digital Signal Processing, CSNDSP 2016
BT - 2016 10th International Symposium on Communication Systems, Networks and Digital Signal Processing, CSNDSP 2016
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 10th International Symposium on Communication Systems, Networks and Digital Signal Processing, CSNDSP 2016
Y2 - 20 July 2016 through 23 July 2016
ER -