发明名称 |
VERFAHREN UND VORRICHTUNG ZUR BESTIMMUNG DER EIGENSCHAFTEN VON KOMPONENTEN EINES KOMMUNIKATIONSKANALS |
摘要 |
The invention refers to a method and an apparatus for determining characteristics of components of a communication channel. In order to simplify the intersystem coordination in a beginning of life test of a satellite communication channel and avoiding the interference of adjacent satellite systems the method according to the invention comprises the following steps: modulating a clean carrier signal f(t) by spread spectrum modulation to generate a spreaded clean carrier signal s(t); transmitting said spreaded clean carrier signal s(t) through said communication channel at a first predetermined level; receiving a receive signal s'(t) corresponding to said spreaded clean carrier signal s(t) after having traveled through said communication channel; demodulating said receive signal s'(t) by spread spectrum demodulation to generate a despreaded carrier signal f'(t); determining characteristics of components of the communication channel on the basis of a comparison of said clean carrier signal f(t) and said despreaded carrier signal f'(t). |
申请公布号 |
DE69926808(T2) |
申请公布日期 |
2006.06.29 |
申请号 |
DE1999626808T |
申请日期 |
1999.06.18 |
申请人 |
SES ASTRA S.A., CHATEAU DE BETZDORF |
发明人 |
BETHSCHEIDER, GERHARD;HARLES, GUY |
分类号 |
H04B1/707;H04B17/00;H04B7/185;H04B7/216;H04B17/02 |
主分类号 |
H04B1/707 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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