System and method for reuse of communications spectrum for...

Telecommunications – Radiotelephone system – Zoned or cellular telephone system

Reexamination Certificate

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Details

C455S447000, C455S450000, C455S452100, C455S452200

Reexamination Certificate

active

07146176

ABSTRACT:
A communications system network that enables secondary use of spectrum on a non-interference basis is disclosed. Each secondary transceiver measures the background spectrum. The system uses a modulation method to measure the background signals that eliminates self-generated interference and also identifies the secondary signal to all primary users via on/off amplitude modulation, allowing easy resolution of interference claims. The system uses high-processing gain probe waveforms that enable propagation measurements to be made with minimal interference to the primary users. The system measures background signals and identifies the types of nearby receivers and modifies the local frequency assignments to minimize interference caused by a secondary system due to non-linear mixing interference and interference caused by out-of-band transmitted signals (phase noise, harmonics, and spurs). The system infers a secondary node's elevation and mobility (thus, its probability to cause interference) by analysis of the amplitude of background signals. Elevated or mobile nodes are given more conservative frequency assignments that stationary nodes.

REFERENCES:
patent: 4672657 (1987-06-01), Dershowitz
patent: 4736453 (1988-04-01), Schloemer
patent: 4783780 (1988-11-01), Alexis
patent: 4878238 (1989-10-01), Rash et al.
patent: 4881271 (1989-11-01), Yamauchi
patent: 4977612 (1990-12-01), Wilson
patent: 5040238 (1991-08-01), Comroe et al.
patent: 5093924 (1992-03-01), Toshiyuki et al.
patent: 5093927 (1992-03-01), Shanley
patent: 5142691 (1992-08-01), Freeburg et al.
patent: 5177604 (1993-01-01), Martinez
patent: 5179722 (1993-01-01), Gunmar et al.
patent: 5203012 (1993-04-01), Patsiokas et al.
patent: 5239676 (1993-08-01), Strawczynski et al.
patent: 5247701 (1993-09-01), Comroe et al.
patent: 5276908 (1994-01-01), Koohgoli et al.
patent: 5375123 (1994-12-01), Andersson et al.
patent: 5402523 (1995-03-01), Berg
patent: 5410737 (1995-04-01), Jones
patent: 5412658 (1995-05-01), Arnold et al.
patent: 5422930 (1995-06-01), McDonald et al.
patent: 5428819 (1995-06-01), Wang et al.
patent: 5497505 (1996-03-01), Koohgoli et al.
patent: 5511233 (1996-04-01), Otten
patent: 5548809 (1996-08-01), Lemson
patent: 5608727 (1997-03-01), Perreault et al.
patent: 5655217 (1997-08-01), Lemson
patent: 5752164 (1998-05-01), Jones
patent: 5794151 (1998-08-01), McDonald et al.
patent: 5822686 (1998-10-01), Lundberg et al.
patent: 5828948 (1998-10-01), Almgren et al.
patent: 5850605 (1998-12-01), Souissi et al.
patent: 5862487 (1999-01-01), Fujii et al.
patent: 5943622 (1999-08-01), Yamashita
patent: 6044090 (2000-03-01), Grau et al.
patent: 6049717 (2000-04-01), Dufour et al.
patent: 6615040 (2003-09-01), Benveniste

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