Modulation analysis and distortion identification
First Claim
Patent Images
1. An apparatus comprising:
- one or more processors; and
memory storing instructions that, when executed by the one or more processors, cause the apparatus to;
generate, based on a first signal received from a computing device, a first symbol placement, wherein the first signal was transmitted based on a first set of equalization coefficients;
transmit, to the computing device, a second set of equalization coefficients;
generate, based on a second signal received from the computing device, a second symbol placement, wherein the second signal was transmitted based on the second set of equalization coefficients; and
transmit, based at least in part on the second symbol placement, a status message comprising an indication of one or more symbols that satisfy a threshold indicative of likely demodulation error at the computing device.
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Abstract
An apparatus, method, computer readable medium, and system are provided to determine whether a non-linear signal impairment is present in a network communication channel. For instance, a computing device may transmit equalization coefficients to a user device to modify future signals generated by the user device. If the equalization coefficients are unable to reduce a signal impairment, the signal impairment may be a non-linear signal impairment. The computing device may generate symbol placements based on signals received from the user device and transmit status messages.
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Citations
24 Claims
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1. An apparatus comprising:
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one or more processors; and memory storing instructions that, when executed by the one or more processors, cause the apparatus to; generate, based on a first signal received from a computing device, a first symbol placement, wherein the first signal was transmitted based on a first set of equalization coefficients; transmit, to the computing device, a second set of equalization coefficients; generate, based on a second signal received from the computing device, a second symbol placement, wherein the second signal was transmitted based on the second set of equalization coefficients; and transmit, based at least in part on the second symbol placement, a status message comprising an indication of one or more symbols that satisfy a threshold indicative of likely demodulation error at the computing device. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. An apparatus comprising:
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one or more processors; and memory storing instructions that, when executed by the one or more processors, cause the apparatus to; determine that application of equalization coefficients to signals transmitted by a computing device and via a communication channel is unable to reduce signal impairment associated with the signals to satisfy a threshold value within a threshold amount of time; determine, based on the determination that application of equalization coefficients is unable to reduce the signal impairment to satisfy the threshold value within the threshold amount of time, that a non-linear signal impairment is present in the communication channel; and causing output of an indication that the non-linear signal impairment is present in the communication channel. - View Dependent Claims (10, 11, 12)
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13. An apparatus comprising:
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one or more processors; and memory storing instructions that, when executed by the one or more processors, cause the apparatus to; generate, based on a first set of equalization coefficients associated with a first signal received from a computing device, a first symbol placement; generate, based on a second set of equalization coefficients associated with a second signal received from the computing device, a second symbol placement; and determine a likely source of a demodulation error associated with the first symbol placement and the second symbol placement. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20)
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21. A system comprising:
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a first computing device and a second computing device; wherein the first computing device comprises; one or more processors; and memory storing instructions that, when executed by the one or more processors, cause the first computing device to; generate, based on a first signal received from the second computing device, a first symbol placement, wherein the first signal was transmitted based on a first set of equalization coefficients; transmit, to the second computing device, a second set of equalization coefficients; generate, based on a second signal received from the second computing device, a second symbol placement, wherein the second signal was transmitted based on the second set of equalization coefficients; and transmit, based at least in part on the second symbol placement, a status message comprising an indication of one or more symbols that satisfy a threshold indicative of likely demodulation error at the second computing device; and wherein the second computing device comprises; one or more processors; and memory storing instructions that, when executed by the one or more processors of the second computing device, cause the second computing device to; transmit the first signal; and transmit the second signal. - View Dependent Claims (22, 23, 24)
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Specification