Microwave Radio Equipment and Building Considerations

  • Skrabal R.
  • Word J.

Microwave radio relay stations have existed in the Bell System in several forms since 1950.1 In this time, the equipment and the layouts within the buildings have changed to accommodate the new designs that have been introduced into these systems. The introduction of the T D - 3 repeater bay offers further opportunities for improvements particularly in the simplification of power requirements. The basic power for a T D - 3 station is --24 volts dc. Those power plant elements peculiar to TD-2, namely the +250, + 130, and --12V dc plants have been eliminated. Voltages other than --24V dc are furnished by dc-to-dc converters, except for +24V dc which may be furnished by a separate plant in some stations. Except for the power plant, the typical T D - 3 station will not differ greatly from recently constructed TD-2 stations, since the 100A IF protection switching system, 2 the 3A FM terminals, and the 3A solid-state wire line entrance links have been previously introduced into the TD-2 system. The 200A protection switching system for use with the 3A FM terminals and wire line entrance links has been developed for long haul microwave radio systems.

Recent Publications

August 09, 2017

A Cloud Native Approach to 5G Network Slicing

  • Francini A.
  • Miller R.
  • Sharma S.

5G networks will have to support a set of very diverse and often extreme requirements. Network slicing offers an effective way to unlock the full potential of 5G networks and meet those requirements on a shared network infrastructure. This paper presents a cloud native approach to network slicing. The cloud ...

August 01, 2017

Modeling and simulation of RSOA with a dual-electrode configuration

  • De Valicourt G.
  • Liu Z.
  • Violas M.
  • Wang H.
  • Wu Q.

Based on the physical model of a bulk reflective semiconductor optical amplifier (RSOA) used as a modulator in radio over fiber (RoF) links, the distributions of carrier density, signal photon density, and amplified spontaneous emission photon density are demonstrated. One of limits in the use of RSOA is the lower ...

July 12, 2017

PrivApprox: Privacy-Preserving Stream Analytics

  • Chen R.
  • Christof Fetzer
  • Le D.
  • Martin Beck
  • Pramod Bhatotia
  • Thorsten Strufe

How to preserve users' privacy while supporting high-utility analytics for low-latency stream processing? To answer this question: we describe the design, implementation and evaluation of PRIVAPPROX, a data analytics system for privacy-preserving stream processing. PRIVAPPROX provides three properties: (i) Privacy: zero-knowledge privacy (ezk) guarantees for users, a privacy bound tighter ...