首页>
外国专利>
A SYSTEM FOR INCREASING THE UTILITY OF SATELLITE COMMUNICATION SYSTEMS
A SYSTEM FOR INCREASING THE UTILITY OF SATELLITE COMMUNICATION SYSTEMS
展开▼
机译:一种提高卫星通信系统利用率的系统
展开▼
页面导航
摘要
著录项
相似文献
摘要
An existing TDRSS satellite communication system is incorporated, together with low-power ground-based remote transceivers (#1) of special design, and additional beam forming and steering elements at the ground terminals, to make possible digital communication between low power field transceivers and satellite ground terminals. The satellite communication system transmits to its ground terminals a composite signal, comprising amplified, phase-coherent signals received by an array of broad-coverage antennas on the satellite. The field transceiver transmits a pseudonoise coded signal spread across all or a portion of the stellite's receive bandwidth. At the ground terminal, the downlinked composite signal is processed by a beamformer to define a narrow, high-gain beam between the satellite and low-power transceiver. Signal processing gain and beamformer gain in combination serve to elevate the received, demodulated signals well above the noise level at the receiver.
展开▼