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Optimal intra-symbol transmit windowing for multicarrier modulation

Publiceringsår: 2006
Språk: Engelska
Publikation/Tidskrift/Serie: Proc. Intl. Symp. on Communications, Control and Signal Processing ISCCSP 2006
Dokumenttyp: Konferensbidrag


Windowing of the transmitted blocks in a multicarrier

system yields an improved spectral containment of the

resulting basis functions, which allows larger transmit power compared to no windowing while fulfilling the power spectral density (PSD) requirements. Most transmit window designs proposed so far aim at maximising the mainlobe energy and thus the spectral containment of the transmit basis functions.

In this paper, we compute the transmit window that is

optimal in the sense of maximising the information rate for a time-dispersive Gaussian channel known to the transmitter and compare it to the maximum mainlobe-energy window.

It is shown that the maximum-rate window outperforms the

maximum mainlobe-energy window in terms of information

rate, particularly for low SNRs and for short cyclic extensions.

The out-of-band PSD characteristics of the maximum mainlobeenergy window is superior for short cyclic extensions but gradually deteriorates with the length of the cyclic extension.


  • Electrical Engineering, Electronic Engineering, Information Engineering


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