A Methodology for Calculating the Impact of MSS Space-to-Earth Interference on FS Radio-Relay Ground Stations
	Microwave Coordination and Relocation: Minimizing the Risks
	Supporting Analysis for a Proposed Methodology to Quantify MSS/FS Interference
	The PCS Deployment and Microwave Coordination and Relocation: An Approach That Works

Microwave Coordination and Relocation: Minimizing the Risks
Dr. Robert Boyle
NSMA Newsletter
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Addressing the microwave/coordination issue is much like opening Pandora's box. No other issue in the PCS industry has as much potential to delay system deployment and overrun deployment budgets. Perhaps the greatest risk stems from the fact that the PCS industry is the first to confront such an issue. As a consequence, many operators have experienced difficulties anticipating and developing work-arounds to obstacles and pitfalls associated with the coordination/relocation issue.

The PCS Deployment and Microwave Coordination and Relocation: An Approach That Works
Dr. Robert Boyle
PCIA "Daily", PCIA'96 , also NSMA Newsletter
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Operators can minimize relocation difficulties by using proactive management and innovative engineering techniques. One key to identifying and avoiding hazards associated with microwave coordination and relocation is the aggressive and effective execution of the PCS deployment process, particularly as it pertains to microwave coordination/relocation. This paper describes a deployment process that allows PCS operators to cover a particular market, while avoiding potential interference cases and minimizing the number of incumbent microwave licensees that require relocation. We demonstrate the close interrelationship between PCS system design, PCS-Microwave interference analysis and coordination, and microwave relocation. We also show that the ability to analyze interference, in a precise and frequency selective manner is essential to any coordination/relocation process. This paper presents the framework for such an analysis and show how operators can employ such an interference analysis to work around interference cases in their respective systems.

The Impact of Dust and Foliage on Signal Attenuation in the Millimeter Wave Regime
Gary Comparetto
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This paper discusses the phenomena associated with signal attenuation through dust and foliage and quantifies the impact of these environments on signal propagation. Models used to characterize dust and foliage attenuation are described and available experimental data are presented to support the discussion.

Global Mobile Satellite Communications: A Review of Three Contenders
Gary M. Comparetto, Radio Dynamics Corporation and Neal D. Hulkower, Ph.D., The MITRE Corporation
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Three of the more mature proposed "Big" LEO/MEO satellite systems, Globalstar, IRIDIUM, and Odyssey, are discussed in this paper. The system architectures of each system are presented along with a description of the satellite and user handset designs, the multi-access techniques employed, and an analysis of their respective cost structures.

Mobile Satellite Service (MSS) System Characterization
Gary Comparetto
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This paper provides a summary of key operational characteristics of Mobile Satellite Services (MSS) systems that have been recently proposed for operation in the 2 GHz band.

Supporting Analysis for a Proposed Methodology to Quantify MSS/FS Interference
Jim Marshall and Gary Comparetto
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This paper provides the supporting analysis for a methodology developed by RDC to quantify the impact of MSS space-to-Earth interference on FS radio-relay ground stations. The derivation of key probability equations for the cases of link fade only and link fade plus MSS interference is provided. Also included is a methodology developed to transform PDF data relating to the received noise power level into PDF data relating to the level by which the received noise power level exceeds the receiver noise floor.

A Methodology for Calculating the Impact of MSS Space-to-Earth Interference on FS Radio-Relay Ground Stations
Jim Marshall and Gary Comparetto
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This briefing summarizes the methodology developed by RDC to quantify the impact of MSS space-to-Earth interference on FS radio-relay ground stations.

Satellite Communications - Current Features and Future Trends
Gary Comparetto
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This paper addresses satellite systems whose primary mission is communications. The focus is on how the design of communications satellite systems has been evolving over the past two decades. The driving features of recently proposed satellite communications system architectures are presented along with a discussion of the significant trends that might be expected in the near future. Key system characteristics are identified and discussed.

A Statistical Analysis of the OpenLink Fixed Service (FS) Microwave Database in the 2165 to 2200 MHz Frequency Range
Gary Comparetto
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This paper presents statistics for the Fixed Service (FS) microwave community in the 2165-2200 MHz frequency range, and should be viewed as a snapshot for the January 1998 timeframe. The statistics were derived using the Radio Dynamics Corporation (RDC) OpenLink database and are useful in performing interference analyses between FS and mobile satellite service (MSS) systems. The statistics presented in this paper address modulation type, transmit antenna size, path length, path inclination and azimuth. The percentage of digital and analog links was calculated regarding modulation type. For the other parameters listed above, probability density function (PDF) data and cumulative distribution function (CDF) data was generated.

A Snapshot of Current Domestic Use for the 17.7-19.7 GHz Frequency Range
Gary Comparetto
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This briefing presents selected data describing current Fixed Service (FS) microwave services in the 17.7-19.7 GHz frequency range, and should be viewed as a snapshot for the February 1998 timeframe. The data were derived using the Radio Dynamics Corporation (RDC) OpenLink database and are useful in understanding how the 17.7-19.7 GHz band is currently allocated. The data presented in this briefing address the number of paths/frequencies and the path length statistics for the services investigated. Additionally, CONUS plots are provided for the wideband and narrowband FS services.