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US 6,188,496 B1Granted
Wireless communication system
AssigneeInternational Business Machines Corporation
InventorsArvind Krishna, Mahmoud Naghshineh, Claus Michael Olsen
Life of this patent
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Abstract
A repeater that has a receiver for receiving a signal. A validation module determines whether a signature is present in the received signal. An invalidation module determines whether undesired signal components are present in the received signal. The received signal is transmitted if the signature is present and if the undesired signal components are not present.
Claims23
A repeater comprising:
- receiving means for receiving a first signal from a first medium;
- validation means for determining whether a signature is present in said first signal said validation means comprising:
- sampling means for sampling said first signal for a predetermined duration;
- first counting means for counting a number of samples of said first signal at one signal level;
- second counting means for counting a number of samples of said first signal at another signal level;
- comparing means for comparing the number of samples at said one signal level to the number of samples at said another signal level;
- and
- correlating means for ensuring that said samples at said one signal level and said samples at said another signal level alternate;
- invalidation means for determining whether undesired signal components are present in said signal;
- communication means for transmitting said first signal to a second medium if said signature is present and if said undesired signal components are not present;
- and
- transmitting means for transmitting a second signal received from said second medium to said first medium.
9 more elements
A repeater comprising:
- receiving means for receiving a first signal from a first medium;
- invalidation means for determining whether undesired signal components are present in said signal;
- wherein the invalidation means comprises:
- sampling means for sampling said first signal for a predetermined duration;
- first counting means for counting a number of samples of said first signal at one signal level;
- second counting means for counting a number of samples of said second signal at another signal level;
- calculating means for calculating a ratio of the number of samples at said one signal level to the number of samples at said another signal level;
- and
- comparing means for comparing the ratio to a predetermined threshold;
- communication means for transmitting said first signal to a second medium if said signature is present and if said undesired signal components are not present;
- and
- transmitting means for transmitting a second signal received from said second medium to said first medium.
9 more elements
A repeater comprising:
- receiving means for receiving a first signal from a first medium;
- validation means for determining whether a signature is present in said first signal;
- invalidation means for determining whether undesired signal components are present in said signal;
- wherein said invalidation means comprises:
- means for determining a signal strength of said undesired signal components;
- validation means for determining whether a signature is present in said first signal;
- communication means for transmitting said first signal to a second medium if said signature is present and if said undesired signal components are not present;
- and
- transmitting means for transmitting a second signal received from said second medium to said first medium;
- said validation means comprises:
- means for determining a signal strength of desired signal components;
- and
- said repeater further comprises:
- means for generating a ratio of said signal strength of said undesired signal components to said signal strength of said desired signal components;
- and
- means for comparing said ratio to a predetermined threshold.
13 more elements
A method of regenerating a signal comprising the steps of:
- (a) receiving said signal;
- (b) determining whether a signature is present in said signal by performing the steps of:
- (i) sampling said signal for a predetermined duration;
- (ii) counting a number of samples at one signal level;
- (iii) counting a number of samples at another signal level;
- (iv) comparing the number of samples at said one signal level to the number of samples at said another signal level;
- and
- (v) ensuring that said samples at said one signal level and said samples at said another signal level alternate;
- (c) determining whether undesired signal components are present in said signal;
- and
- (d) transmitting said signal if said signature is present and if said undesired signal components are not present.
8 more elements
A method of regenerating a signal comprising the stops of:
- (a) receiving said signal;
- (b) determining whether a signature is present in said signal;
- (c) determining whether undesired signal components are present in said signal;
- (i) sampling said signal for a predetermined duration;
- (ii) counting a number of samples at one signal level;
- (iii) counting a number of samples at another signal level;
- (iv) calculating the ratio of the number of samples at said one signal level to the number of samples at said another signal level;
- and
- (v) comparing the ratio to a predetermined threshold and
- (d) transmitting said signal if said signature is present and if said undesired signal components are not present.
7 more elements
A method of regenerating a signal comprising the steps of:
- (a) receiving said signal;
- (b) determining whether a signature is present in said signal;
- (c) determining whether undesired signal components are present in said signal;
- (d) transmitting said signal if said signature is present and if said undesired signal components are not present
- (e) determining a signal strength of said undesired signal components;
- (f) determining a signal strength of desired signal components;
- and
- (g) generating a ratio of said signal strength of said undesired signal components to said signal strength of said desired signal components;
- and
- (h) comparing said ratio to a predetermined threshold.
7 more elements
Dependencies are inferred from the claim text.