Optimal precoding for transmissions over linear time-varying channels

Sergio Barbarossa, Anna Scaglione

Research output: Chapter in Book/Report/Conference proceedingConference contribution

7 Scopus citations


In this work we derive an approximate analytic model for the eigenfunctions of underspread LTV channels which plays a fundamental role in the analysis/synthesis of the optimal precoding that maximizes the information rate in transmissions over linear time-varying (LTV) channels. We assume that channel status information is available to both receiver and transmitter and that the channel impulse response can be predicted exactly, within a finite duration interval, from its past evolution. More specifically, we use our analytic model to prove that the optimal precoding is equivalent to apply the water-filling principle in the time-frequency domain and to simplify the computation of the optimal precoder. We include numerical results to support the validity of our model.

Original languageEnglish (US)
Title of host publicationConference Record / IEEE Global Telecommunications Conference
Number of pages5
StatePublished - 1999
Externally publishedYes
Event1999 IEEE Global Telecommunication Conference - GLOBECOM'99 - Rio de Janeiro, Braz
Duration: Dec 5 1999Dec 9 1999


Other1999 IEEE Global Telecommunication Conference - GLOBECOM'99
CityRio de Janeiro, Braz

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Global and Planetary Change


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