Network Signalling Compression forBitLoading
Thierry Lestable · 2005
between theaccess point andthemobile terminal, leading toms associated signaling load, whoseamoant maydecrease thesystemTheconsidered transmission system isbased on adassical MC traunission effldency. Amechaisun forreducingthe amnount of schemeimplementing theChowalgorithm [8]. Figure 1illustrates signaiSng information hastobedesigned forincreasing the themostimportant steps ofthis adaptation process. overdi system capadty (moreusers, moreavaiable bandwidth). (l) w amWnAN A,.. (2) -Wpvtmiwd Thispaperaddresses Mult-Cwrier systems whoselink so0*_7-1 soF adaptation iscaried outbymeansofBitLoadhig algorithms. However, theassociated signaling loadincreases quicidy withthe f _; numberofsub-crniers, modulation schemes andusers. These bit 30i e loading vectors areconsidered a-priori knownatthereceiver, and i 20 almostno literature concerning trasnsission of such information isavailable. In realistic transsission systems, o 10 corrdeation exists intimeduetoDoppler effect, andinfrequency duetomulti-path delay spread. We intend toexploit this twofold