logo

For the Inventor, By the Inventor

The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.

The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.

Patent No.:

US 5627879 B1

PDFFull Text
Date of Patent:
May. 06, 1997

Filed:

Mar. 02, 1994

Cellular communications system with centralized base stations and

Applicant:
Inventors:

David S Russell, Minneapolis, MN (US);

Larry G Fischer, Waseca, MN (US);

Philip M Wala, Waseca, MN (US);

Charles R Ratliff, Crystal Lake, IL (US);

Jeffrey Brennan, Waseca, MN (US);

Assignee:

ADC Telecommunications, Inc., Bloomington, MN (US);

Attorney:

Schwegman, Lundberg, Woessner & Kluth, P.A.

Primary Examiner:

Curtis Kuntz

Assistant Examiner:

G J Oehling

Int. Cl.
CPC ...
H04Q / ;
U.S. Cl.
CPC ...
379 59 ; 455 331 ; 455 332 ; 455 333 ; 455 334 ; 379 60 ; 370328 ;
Abstract

A microcellular communications network includes a plurality of base station units and corresponding antenna units. The base station units are housed in a common location. Each includes either conventional transmitters and receivers or all digital transmitter and receiver equipment, and interface circuitry to a mobile telecommunications switching office. The microcell traffic output is applied to a frame generator/multiplexer. The output of the frame generator/multiplexer is applied to a digitally modulated laser. The laser output is conveyed by fiber to a remote antenna unit, which demultiplexes the microcell traffic signal and applies it to a digital-to-analog converter. The output of the digital-to-analog converter is applied to a power amplifier, which in turn is connected to a main antenna. RF signals from the mobile units are received at both a main and a diversity antenna. The received signals are filtered, digitized, multiplexed together and transmitted over the optical fiber back to the base station. The strongest signal is selected for use.

Published as:
WO9428690A1; AU7045494A; CN1127056A; JPH08510878A; US5621786A; US5627879A; BR9406730A; US5642405A; US5644622A; US5657374A; US5852651A; CN1065402C; KR100300449B1; JP3553942B2; USRE40564E; USRE43964E; USRE45321E;

Find Patent Forward Citations

Russell, David. (1997). Cellular communications system with centralized base stations and (U.S. Patent No. 5627879). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/5627879

Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile

Loading…