Communication Systems

  • Report

    Report

    Conceptual Approaches in the Design of Optimal Radar and Sonar Systems: Canonical Methods, Models, and Operators

    Part of a study undertaken to develop formal methods for investigating the design of optimal radar (and sonar) systems as a totality and in terms of functional elements, in a way that treats the physical model, the system purpose, and the criteria ...

    Jan 1, 1968

  • Report

    Report

    Communication Policy Issues for the Coming Computer Utility.

    An expanded version of P-3466 (which appeared in [Public Interest], Summer 1967) revised for computer system personnel and users of time-shared computer systems. Remote time-sharing systems are very ill-served by telephone systems designed for voice...

    Jan 1, 1968

  • Report

    Report

    The Coming Computer Utility -- Laissez-Faire, Licensing, or Regulation?

    The growth of the computer industry, which presses upon existing regulatory processes, makes necessary a re-examination of the entire regulatory structure for data transmission.

    Apr 1, 1967

  • Report

    Report

    Satellite Separation and the Allocation and Specification of Shared Spectrum Usage for Intense Exploitation.

    A discussion of means of sharing the radio frequency spectrum above 3400 MHz among terrestrial microwave relay, satellite relay, and satellite earth stations for fixed or mobile communication services, including direct broadcast from satellites. Eac...

    Jan 1, 1967

  • Report

    Report

    Multiple-access techniques for communication satellites: digital modulation, time-division multiplexing, and related signal processing [by] C. R. Lindholm.

    An evaluation of digital transmission techniques for miltiple access to a communication satellite. Specific features of digital techniques are examined: time-division multiplexing, error correction codes, analog-to-digital conversion methods, and syn...

    Jan 1, 1966

  • Report

    Report

    Multiple-access techniques for communication satellites: analog modulation, frequency-division multiplexing, and related signal processing methods [by] E. E. Reinhart.

    A tutorial, theoretical description of analog modulation methods, frequency-division multiplexing, and the signal processing techniques sometimes used with them in radio communication systems. Amplitude and angle modulation methods (AM DSB, SSB, PM, ...

    Jan 1, 1966

  • Report

    Report

    A class of codes for multiple-access satellite communication systems

    A mathematical description of a specific method for allocating time and frequency in communication satellite systems that use time-frequency multiplexing for multiple random access. This method of constructing addresses from a time-frequency matrix c...

    Jan 1, 1966

  • Journal Article

    Journal Article

    On the Origin and Characteristics of Single-Sided Angle Modulation

    Comments and replies between the author and colleagues on single-sided angle modulation (SSB-FM).

    Jan 1, 1965

  • Report

    Report

    Communication Satellite Output Devices

    A review of the field of power amplification at communication satellite frequencies.

    Jan 1, 1965

  • Report

    Report

    Navigation by satellite using two-way range and doppler data

    Presentation of a method for obtaining a navigation capability as a bonus to a communication satellite system. The Memorandum is primarily concerned with the technology of determining a user vehicle's position from a single satellite by obtaining mu...

    Jan 1, 1965

  • Report

    Report

    Soviet Transport and Communications: Output Indexes, 1928-1962

    This publication is an attempt to assess the role of transportation and communication (the aggregate performance of which has not been measured before) in the Soviet Union's overall economic growth.

    Jan 1, 1964

  • Visualization of information tracking

    Report

    Cost Estimate

    The tenth in a series of 11 memoranda detailing the Distributed Adaptive Message Block Network, this volume provides a cost estimate for the proposed system, based on an arbitrary network configuration of 400 switching nodes, servicing 100,000 simultaneous users via 200 multiplexing stations. Assuming a usable life of ten years, all costs are estimated at about $60,000,000 per year.

    Jan 1, 1964

  • Circuit board technology concept

    Report

    History, Alternative Approaches, and Comparisons

    The fifth in a series of 11 memoranda detailing the Distributed Adaptive Message Block Network, this volume acknowledges the efforts of people in many fields working toward the development of large communications systems where system reliability and survivability are mandatory.

    Jan 1, 1964

  • Network illustration

    Report

    Introduction to Distributed Communications Networks

    The first in a series of 11 memoranda detailing the Distributed Adaptive Message Block Network, this volume introduces the system concept and outlines the requirements for and design considerations of the distributed digital data communications network. It considers especially the use of redundancy as a means of withstanding heavy enemy attacks.

    Jan 1, 1964

  • Abstract network data visualization

    Report

    Tentative Engineering Specifications and Preliminary Design for a High-Data-Rate Distributed Network Switching Node

    The seventh in a series of 11 memoranda detailing the Distributed Adaptive Message Block Network, this volume considers the specifications of the proposed system's switching node. Timing calculations, together with a projected implementation scheme, provide a strong foundation for the belief that the construction and use of the node is practical.

    Jan 1, 1964

  • Digital network communication concept

    Report

    The Multiplexing Station

    The eighth in a series of 11 memoranda detailing the Distributed Adaptive Message Block Network, this volume describes the multiplexing stations which connect subscribers to the switching nodes. The network will simultaneously process traffic from up to 1024 separate users sending a mixture of start-stop teletypewriter, digital voice, and other synchronous signals at various rates.

    Jan 1, 1964

  • An abstract digital world map focused on Europe with communication lines

    Report

    Priority, Precedence, and Overload

    The fourth in a series of 11 memoranda detailing the Distributed Adaptive Message Block Network, this volume discusses the creation of dynamic or flexible priority and precedence structures within a communication system handling a mixture of traffic with different data rate, urgency, and importance levels.

    Jan 1, 1964

  • Abstract waves

    Report

    Mini-Cost Microwave

    The sixth in a series of 11 memoranda detailing the Distributed Adaptive Message Block Network, this volume examines the technical feasibility of constructing an extremely low-cost, all-digital, X- or Ku-band microwave relay system, operating at a multi-megabit per second data rate.

    Jan 1, 1964

  • Abstract network illustration

    Report

    Digital Simulation of Hot-Potato Routing in a Broadband Distributed Communications Network

    The second in a series of 11 memoranda detailing the Distributed Adaptive Message Block Network, this volume describes a computer simulation of the message routing scheme proposed. The basic routing doctrine permitted a network to suffer a large number of breaks, then reconstitute itself by rapidly relearning to make best use of the surviving links.

    Jan 1, 1964

  • Distributed network illustration

    Report

    Summary Overview of 'On Distributed Communications'

    The last in a series of 11 memoranda detailing the Distributed Adaptive Message Block Network, this volume summarizes the system proposal, highlighting the more important features. It considers the particular advantages and disadvantages of the distributed network.

    Jan 1, 1964