Filtering communications channels within telecommunications satellites
First Claim
1. A method of filtering channels in a telecommunications satellite, comprising:
- monitoring at least one channel of an uplink signal by stepping across said one channel with a first analog agile filter having a narrow bandwidth in relation to the channel, and at each step monitoring the signal within the channel step, in order to determine the presence of interfering signals;
providing a filter arrangement, comprising at least a second analog filter, having an adjustable band stop function; and
configuring said filter arrangement to block said interfering signals.
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Accused Products
Abstract
A method is disclosed for filtering communications channels in a telecommunications satellite to remove large unwanted interfering signals, which includes monitoring channels of an uplink signal by stepping across a channel with a first analog agile filter having a narrow bandwidth in relation to the channel, and at each step monitoring the signal within the channel step, in order to determine the presence of interfering signals, and configuring a second analog agile filter having an adjustable band stop function to block the interfering signals. The uplink signal has first and second signal paths for the uplink signal, and the method includes demultiplexing the channels of the uplink signal onto separate lines in the first path, carrying out the band stop function within the second signal path, and replacing with the remaining filtered part of the channel, by a switching operation, the demultiplexed version of the channel.
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Citations
14 Claims
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1. A method of filtering channels in a telecommunications satellite, comprising:
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monitoring at least one channel of an uplink signal by stepping across said one channel with a first analog agile filter having a narrow bandwidth in relation to the channel, and at each step monitoring the signal within the channel step, in order to determine the presence of interfering signals; providing a filter arrangement, comprising at least a second analog filter, having an adjustable band stop function; and configuring said filter arrangement to block said interfering signals. - View Dependent Claims (2)
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3. A channel filtering apparatus for a telecommunications satellite, including:
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a monitoring arrangement, for monitoring at least one communication channel of an uplink signal, for detection of interfering signals, including an analog agile filter for stepping across said one channel and having a narrow bandwidth in relation to said one channel, and a controller for determining within each step the presence of an interfering signal; and an analog filter arrangement responsive to said monitoring arrangement, which provides an adjustable band stop function for blocking said interfering signal. - View Dependent Claims (4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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Specification