Protection Relay Systems Employing PCM Telecommunication

Digital Communications for Relay Protection

Electric utilities are expanding communications infrastructure due to increased need for information. Due to performance, price, and technological advances, digital communication systems are frequently chosen as this multiple user data network. This two-part paper describes the application of digital communication in power system protection. Part 1 describes the digital communications architect...

Information & Telecommunication Systems

Spectral Efficiency Evaluation of Downlink Mobile Multi-hop Relay Systems Employing Macro Diversity Handover Technique

IEEE 802.16j is an amendment to the IEEE 802.16 broadband wireless access standard to enable the operation of multi-hop relay stations (RS). It aims to enhance the coverage, per user throughput and system capacity of IEEE 802.16e. There are three handover techniques supported within the IEEE 802.16e and IEEE 802.16j – Hard Handover (HHO), Fast Base Station Switching (FBSS) and Macro Diversity H...

Data Compression in Pcm Telemetry Systems

The data capacity of aerospace PCM telemetry systems can be greatly improved by the application of data compression techniques, which exploit the redundancy in typical telemetry data. This paper describes the design concept for a compressed PCM (CPCM) telemetry system, and contrasts system design considerations to those involved in development of a conventional PCM system. Simulation results ar...

Towards Making Database Systems PCM-Compliant

Phase Change Memory (PCM) is a new non-volatile memory technology that is comparable to traditional DRAM with regard to read latency, and markedly superior with regard to storage density and idle power consumption. Due to these desirable characteristics, PCM is expected to play a significant role in the next generation of computing systems. However, it also has limitations in the form of expens...