发明名称 |
SYSTEMS AND METHOD FOR ORTHOGONAL FREQUENCY DIVISIONAL MULTIPLEXING |
摘要 |
Systems and methods for orthogonal frequency division multiplexing are provided. In one embodiment, a method for ranging comprises: receiving at a host a plurality of upstream symbols transmitted from a plurality of remote units, the upstream symbols transmitted on a plurality of orthogonal carriers modulated using an inverse Fourier transform; comparing a phase of at least one ranging symbol received from at least one of the plurality of remote units with a phase of a symbol transmitted by the host; and transmitting an adjustment instruction instructing the at least one of the plurality of remote units to vary a phase of transmissions transmitted from the at least one of the plurality of remote units based on a difference in phase between the at least one ranging symbol and the symbol transmitted by the host unit.
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申请公布号 |
US2009067319(A1) |
申请公布日期 |
2009.03.12 |
申请号 |
US20070927379 |
申请日期 |
2007.10.29 |
申请人 |
ADC TELECOMMUNICATIONS, INC. |
发明人 |
DAPPER MARK J.;GEILE MICHAEL J.;HILL TERRANCE J.;ROBERTS HAROLD A.;ANDERSON BRIAN D.;BREDE JEFFREY;WADMAN MARK S.;KIRSCHT ROBERT J.;HERRMANN JAMES J.;FORT MICHAEL J.;BUSKA STEVEN P.;SOLUM JEFF;ENFIELD DEBRA LEA;BERG DARRELL;SMIGELSKI THOMAS;TUCKER THOMAS C.;HALL JOE;LOGAJAN JOHN M.;BOUALOUANG SOMVAY;LOU HENG;ELPERS MARK;DOWNS MATT;FERRIS TAMMY;OPOCZYNSKI ADAM;RUSSELL DAVID S.;NELSON CALVIN G.;SAMANT NIRANJAN R.;CHIAPPETTA JOSEPH F.;SARNIKOWSKI SCOTT |
分类号 |
G01R31/08;G06F17/14;H04B10/272;H04H20/69;H04H20/77;H04H20/78;H04H20/79;H04H20/80;H04H60/86;H04H60/96;H04H60/97;H04J3/14;H04J14/02;H04L1/00;H04L1/24;H04L5/02;H04L5/14;H04L12/10;H04L12/12;H04L12/24;H04L12/26;H04L12/28;H04L12/44;H04L25/03;H04L27/00;H04L27/26;H04L27/34;H04M7/00;H04M9/02;H04N7/173;H04N7/22;H04N7/24 |
主分类号 |
G01R31/08 |
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