发明名称 FORWARD AND REVERSE CALIBRATION FOR GROUND-BASED BEAMFORMING
摘要 Methods and systems for calibrating the return and forward links of a satellite communication system are provided according to embodiments of the invention. The phase and/or amplitude variations caused by the return and forward links are calculated and/or estimated to aid in beamforming, such as ground-based beamforming. Calibration earth stations, distributed within one or more beam patterns, may be used to transmit calibration codes to the gateway to calibrate the return link. Return links variations may be estimated using a weighted minimum mean square algorithm at the gateway. Forward links may be calibrated with calibration codes transmitted from the gateway through a hybrid matrix to at least one calibration station. Forward calibration links may also calibrate for temperature-dependent signal variations such as diplexer variations at the satellite.
申请公布号 US2016087714(A1) 申请公布日期 2016.03.24
申请号 US201514682938 申请日期 2015.04.09
申请人 ViaSat, Inc. 发明人 Sayegh Soheil
分类号 H04B7/204;H04L5/00;H04W88/16;H04B7/185 主分类号 H04B7/204
代理机构 代理人
主权项
地址 Carlsbad CA US