Method for transmit pulse design for ultra-wideband communications
First Claim
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1. A method for transmitting a pulse, the method comprising:
- forming a quantized representation of the pulse, wherein the forming comprisesspecifying a spectral mask for the pulse,applying an optimization routine to compute samples of the quantized representation of the pulse, wherein the optimization routine minimizes a difference between the quantized representation of the pulse and the pulse, andstoring the samples of the quantized representation of the pulse.
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Abstract
Method for designing transmission pulses for ultra-wideband communications systems. A preferred embodiment comprises specifying a spectral description for the pulse. After a spectral description is created, then an approximation of the pulse can be created and well known optimization techniques, such as the least squares technique, can be used to minimize the difference between the approximation and the pulse. If the communications system is operating in the presence of interferers, then the spectral mask can be modified to ensure that the approximation carries no signal information in frequencies corresponding to the interferers.
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Citations
41 Claims
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1. A method for transmitting a pulse, the method comprising:
forming a quantized representation of the pulse, wherein the forming comprises specifying a spectral mask for the pulse, applying an optimization routine to compute samples of the quantized representation of the pulse, wherein the optimization routine minimizes a difference between the quantized representation of the pulse and the pulse, and storing the samples of the quantized representation of the pulse. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A method for transmitting a pulse, the method comprising:
forming a quantized representation of the pulse, wherein the forming comprises specifying a spectral mask for the pulse, and applying an optimization routine to compute samples of the quantized representation of the pulse, wherein the optimization routine minimizes a difference between the quantized representation of the and the pulse and treats the spectral mask as a desired frequency response for a filter and the filter'"'"'s taps are samples of the quantized representation of the pulse, wherein the optimization comprises; writing a finite length approximation of the pulse, wherein the finite length is a number of samples of the pulse, determining an error function between the pulse and the finite length approximation of the pulse, applying the optimization routine to minimize the error function, and storing the samples of the quantized representation of the pulse. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20, 21)
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22. A method for transmitting a pulse to mitigate interference comprising:
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determining the presence of interferers; specifying a spectral mask for the pulse, wherein the spectral mask is used to describe a frequency response of the pulse, and wherein if the interferers occupy a portion of the spectral mask intended to carry signal, then portions of the spectral mask corresponding to frequencies of the interferers are set to carry significantly less signal than portions corresponding to frequencies intended to carry signal; computing the pulse based on the spectral mask, wherein the computing comprises applying an optimization routine to compute a quantized representation of the pulse, wherein the optimization routine minimizes a difference between the quantized representation of the pulse and the pulse; and providing the pulse to an antenna. - View Dependent Claims (23, 24, 25, 26, 27, 28, 29, 30, 31, 32)
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33. A method for transmitting a pulse to mitigate interference comprising:
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determining the presence of interferers wherein the pulse is a wide-bandwidth pulse for use in an ultra-wideband communications system, and wherein the determining comprises scanning a frequency band essentially equal to a frequency band of the pulse for the presence of interferers, wherein the scanning occurs when a received signal strength indicator (RSSI) measurement is high while an error rate measurement is also high; specifying a spectral mask for the pulse, wherein the spectral mask is used to describe a frequency response of the pulse, and wherein if the interferers occupy a portion of the spectral mask intended to carry signal, then portions of the spectral mask corresponding to frequencies of the interferers are set to carry significantly less signal than portions corresponding to frequencies intended to carry signal; computing the pulse based on the spectral mask; and providing the pulse to an antenna. - View Dependent Claims (34)
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35. A method of transmitting a pulse comprising:
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computing samples of a pulse, wherein computing comprises applying an optimization routine to compute a quantized representation of the pulse, wherein the optimization routine minimizes a difference between the quantized representation of the pulse and the pulse, and the pulse has a variation of more than a specified value across its pass band; creating a representation of a sample of the pulse based upon information about the samples; providing the representation to an antenna to transmit the representation of the sample; and repeating the creating and providing until all samples of the pulse have been transmitted. - View Dependent Claims (36, 37, 38, 39, 40, 41)
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Specification