Method and apparatus for improving received signal quality in an impluse radio system
First Claim
1. A method for communicating pulses positioned in time in accordance with a time layout, comprising:
- transmitting a pulse train signal comprising at least one pulse having at least one predefined pulse characteristic, wherein a predefined pulse characteristic corresponds to an arrival time of the at least one pulse at a receiver;
recovering a received pulse train signal in accordance with the arrival time of the at least one pulse;
measuring one or more interference samples at one or more interference sample times that do not coincide with an arrival time;
modifying the received pulse train signal in accordance with a measured interference sample; and
varying at least one of said one or more interference sample times until one or more received signal quality measures satisfy a predefined signal quality criterion.
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Accused Products
Abstract
An impulse radio system includes an impulse transmitter that transmits a pulse train comprising a number of pulses that are positioned in time for conveying an information signal. An impulse receiver receives the pulse train in accordance with specified arrival times of each pulse and measures interference samples at interference sample times that do not coincide with the pulse arrival times. The interference sample times are varied and the received pulse train signal is modified until a received signal quality criterion is satisfied. The interference sample times may be specified by a code that may also specify pulse arrival times.
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Citations
38 Claims
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1. A method for communicating pulses positioned in time in accordance with a time layout, comprising:
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transmitting a pulse train signal comprising at least one pulse having at least one predefined pulse characteristic, wherein a predefined pulse characteristic corresponds to an arrival time of the at least one pulse at a receiver;
recovering a received pulse train signal in accordance with the arrival time of the at least one pulse;
measuring one or more interference samples at one or more interference sample times that do not coincide with an arrival time;
modifying the received pulse train signal in accordance with a measured interference sample; and
varying at least one of said one or more interference sample times until one or more received signal quality measures satisfy a predefined signal quality criterion. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30)
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31. A method for communicating pulses positioned in time in accordance with a time layout, comprising:
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transmitting a pulse train signal having pulses positioned in time in accordance with code elements of a first code;
receiving the pulse train signal in accordance with code elements of a second code, wherein the code elements of the second code comprise the code elements of the first code and additional code elements. - View Dependent Claims (32, 33, 34)
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35. A method of coding interference sample times, comprising the steps of:
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producing a first code having a plurality of code elements that specify a position in time of a plurality of pulses in accordance with a layout; and
producing a second code having at least one additional code element from said first code wherein the at least one additional code element specifies an interference sample time in accordance with the layout.
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36. A method of coding interference sample times, comprising:
producing a code having at least one code element that specifies an interference sample time in accordance with a layout.
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37. A method for communicating pulses positioned in time in accordance with a time layout, comprising:
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transmitting a pulse train signal having pulses positioned in time in accordance with code elements of a first code;
receiving a subset of the pulse train signal in accordance with code elements of a second code, wherein the code elements of the second code comprise a subset of the code elements of the first code.
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38. A method for communicating pulses positioned in time in accordance with a time layout, comprising:
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transmitting a pulse train signal having pulses positioned in time in accordance with code elements of a first code;
receiving the pulse train signal in accordance with code elements of the first code;
measuring interference samples at times specified by code elements of a second code to remove interference from the received pulse train signal.
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Specification