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Method and system for distributing multiband wireless communications signals
| Details |
Inventors: Schwartz, Adam L.; Hart, David; Eisenberg, John; Forth, Peter;
Assignee: LGC Wireless, Inc. (San Jose, CA)
Primary Examiner: Appiah; Charles
Assistant Examiner: Mehrpour; Naghmeh
Attorney, Agent or Firm: Lumen Intellectual Property Services, Inc.
This invention provides a method and system for distributing multiband wireless communications signals. Downlink RF signals in a plurality of downlink frequency bands are received and then combined into a combined downlink RF signal at the main unit. The combined downlink RF signal is subsequently split into multiple downlink RF-parts, which are converted to multiple downlink optical signals and optically transmitted to the remote units. At each remote unit, a delivered downlink optical signal is first converted back to a downlink RF-part which is subsequently separated into a plurality of downlink RF-groups by frequency band. Each downlink RF-group is individually conditioned (e.g., filtered and amplified). The individual-conditioned downlink RF-groups are then combined and transmitted to a dedicated downlink antenna. |
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DETAILED DESCRIPTION Although the following detailed description contains many specific details for the purposes of illustration, anyone of ordinary skill in the art will appreciate that many variations and alterations to the following details are within the scope of the invention.
Accordingly, the exemplary embodiment of the invention described below is set forth without any loss of generality to, and without imposing limitations upon, the claimed invention.
FIG.
1 depicts an exemplary embodiment of a multiband distributed wireless communications system according to the present invention.
By way of example to illustrate the principal concept and the topological structure of a hybrid star/cascaded architecture of the present invention, the exemplary multiband distributed wireless communications system 100 comprises a main unit 101; multiple remote units including a first cascaded chain of remote units 102, an individual remote unit 103, and a second cascaded chain of remote units 104; and first and second expansion units 105, 106.
A plurality of wireless communications networks 120, including (but not limited to) iDEN, cellular, PCS, paging, and WLAN base-stations (BTS), is connected to main unit 101 by way of an RF-signal transfer means 121 (such as one or more coaxial RF-cables).
Main unit 101 is in turn connected to multiple remote units and expansion units by a plurality of primary-optical-fibers 107-1 through 107-N, including first cascaded chain of remote units 102 by primary-optical-fiber 107-1 and first expansion unit 105 by primary-optical-fiber 107-N.
(The remote units linked to main unit 101 by other members of primary-optical-fibers 107-1 through 107-N are not shown in FIG.
1).
First expansion unit 105 is further connected to individual remote unit 103 by first secondary-optical-fiber 108, to second cascaded chain of remote units 104 by second secondary-optical-fiber 109, and to second expansion unit 106 by third secondary-optical-fiber 110.
(Second expansion unit 106 may likewise be connected to additional remote units and expansion units that are not shown in FIG
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