发明名称 |
SYSTEM AND METHOD FOR RANGING IN A MULTIPOINT-TO-POINT ORTHOGONAL FREQUENCY DIVISION MULTIPLEXING SYSTEM |
摘要 |
Systems and methods for ranging in a multipoint-to-point orthogonal frequency division multiplexing (OFDM) system 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 reference generated by the host; 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 reference generated by the host.
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申请公布号 |
US2008037415(A1) |
申请公布日期 |
2008.02.14 |
申请号 |
US20070925587 |
申请日期 |
2007.10.26 |
申请人 |
ADC TELECOMMUNICATIONS, INC. |
发明人 |
GEILE MICHAEL J.;BREDE JEFFREY |
分类号 |
H04J11/00;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 |
H04J11/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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