Method and system for improving uplink performance

a technology of uplink communication and performance, applied in the field of uplink communication improvement, can solve the problems of reducing the snr of the uplink signal, increasing the noise level, etc., and achieves the effects of increasing the antenna spacing, reducing the dynamic range, and reducing the impact of financial resources

US20130329825A1Inactive Publication Date: 2013-12-12CORNING OPTICAL COMM WIRELESS
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Patent Information

Authority / Receiving Office
US · United States
Patent Type
Applications(United States)
Current Assignee / Owner
Publication Date
2013-12-12
Estimated Expiration
Not applicable · inactive patent

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Abstract

Distributed antenna systems and more particularly to methods and systems for improving uplink communications are disclosed. In one embodiment, Aggregation Point Noise Blocking provides for blocking or filtering of the noise contributed by one or more of the branches coupled to an aggregation point that are not carrying the signal from a particular terminal. Signal activity from a given terminal on a particular branch can be identified and that information can be used to selectively block or filter the signal noise contributed by the other branches to an aggregation point. The selective blocking or filtering can also include an attenuation function to attenuate the signal and provide dynamic range smoothing.
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Description

CROSS-REFERENCE TO RELATED APPLICATIONS

[0001] This is a continuation of U.S. patent application Ser. No. 12 / 033,226, filed Feb. 19, 2008, which claims the benefit of priority under 35 U.S.C. §119 of U.S. Provisional Application No. 60 / 890,587, filed Feb. 19, 2007, both of which applications are hereby incorporated by reference in their entireties.

[0002] This application is related to U.S. application Ser. No. 12 / 033,252, filed on Feb. 19, 2008, entitled “METHOD AND SYSTEM FOR IMPROVING UPLINK PERFORMANCE”, which is hereby incorporated by reference in its entirety.STATEMENT REGARDING FEDERALLY SPONSORED RESEARCH

[0003] Not ApplicableREFERENCE TO MICROFICHE APPENDIX

[0004] Not ApplicableBACKGROUND

[0005] 1. Technical Field of the Invention

[0006] The present invention is directed to improvements for distributed antenna systems and more particularly to methods and systems for improving uplink communications.

[0007] 2. Description of the Prior Art

[0008] Distributed Antenna Systems (DAS) are used to ...

Examples

Embodiment Construction

[0041]In accordance with the invention, two methods and systems for improving the Uplink Performance of a DAS are disclosed. Both methods allow for dynamic range “smoothing”, and thus further contribute to improving the uplink performance.

[0042]The Aggregation Point Noise Blocking (APNB) method and system minimizes noise accumulation in aggregation points of the DAS.

[0043]The Signal Regeneration method and system, includes regeneration of the signal along the uplink path of the DAS is order to improve the signal SNR to the values typical to a signal from a nearby transmitter.

Aggregation Point Noise Blocking

[0044]As explained above, at the aggregation points in the DAS, the noise from the various branches being aggregated is combined, thereby increasing the noise level, while the signal from a specific terminal, which typically would be present only on a single branch, does not increase accordingly. The result is a decrease in SNR which is proportional to the number of branches being...