Method and system for improving uplink performance

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.

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 ...

AI Technical Summary

Benefits of technology

The proposed solutions enhance uplink performance by minimizing noise accumulation and restoring SNR levels, enabling greater antenna spacing and coverage area without compromising signal quality, leading to cost savings and improved wireless communication efficiency.

Problems solved by technology

In another way, the level of the signal remains constant or is increased, but the noise level increases even more.

As a result, aggregating multiple uplink paths increases the noise level and therefore reduces the SNR of the uplink signal.

In some cases, the environment may exhibit a higher level of noise in the specific frequency range in which the signal of interest operates.

However, there is a cost penalty associated with doing this.

An amplifier however, introduces a minimal noise level which is typically higher than the Thermal noise level and increases commensurate with the gain of the amplifier, and thereby will always decrease the SNR of the signal.

The signal level does not change, while the noise level increases, and therefore the SNR is impaired.

Since there is no way to limit the strongest signal, the only available way is to ensure the weakest signal is not too weak As explained above, this can be accomplished by decreasing the distance between the antennas, with the associated negative financial impact.

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