发明名称 |
Method and apparatus for determining characteristics of components of a communication channel |
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 |
HK1041377(A1) |
申请公布日期 |
2006.04.07 |
申请号 |
HK20020102842 |
申请日期 |
2002.04.16 |
申请人 |
SES ASTRA S.A. |
发明人 |
GERHARD BETHSCHEIDER;GUY HARLES |
分类号 |
H04B1/707;H04B7/185;H04B7/216;H04B17/00;H04B17/02;(IPC1-7):H04B |
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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