Method and system for link synchronization in an LTE-TDD architecture
First Claim
1. A method of generating a synchronization switching pulse in a time division duplexing (TDD) system, the method comprising:
- receiving an input signal at an input port of a digital power meter;
receiving, at the digital power meter, a power threshold level;
measuring, using the digital power meter, a power level associated with the input signal;
determining that the power level associated with the input signal exceeds the power threshold level;
determining, for the input signal, a number of rising edges, a number of falling edges, locations of the rising edges, and locations of the falling edges;
determining, for the input signal, one or more pulse widths measured between the locations of the rising edges and the falling edges;
determining a downlink/uplink configuration associated with the input signal;
determining that at least one of the one or more pulse widths is greater than a threshold;
forming an estimated sync pulse;
determining a special subframe configuration associated with the input signal;
determining an offset;
forming a regenerated sync pulse;
determining, using an error detector, an error between the estimated sync pulse and the regenerated sync pulse;
determining that the error is less than an error threshold; and
providing the regenerated sync pulse as the synchronization switching pulse.
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Accused Products
Abstract
A method of detecting a synchronization switching pulse using a power detector in a time division duplexing (TDD) system includes receiving an input signal, detecting a power level associated with the input signal using a digital power meter, and determining a configuration associated with the input signal. The method also includes determining that a pulse width associated with the input signal is greater than a threshold, determining an offset associated with a special subframe configuration, and generating an estimated sync pulse. The method further includes forming a regenerated sync pulse, determining an error between the estimated sync pulse and the regenerated sync pulse, determining that the error is less than a threshold, and providing a lock detect.
10 Citations
18 Claims
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1. A method of generating a synchronization switching pulse in a time division duplexing (TDD) system, the method comprising:
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receiving an input signal at an input port of a digital power meter; receiving, at the digital power meter, a power threshold level; measuring, using the digital power meter, a power level associated with the input signal; determining that the power level associated with the input signal exceeds the power threshold level; determining, for the input signal, a number of rising edges, a number of falling edges, locations of the rising edges, and locations of the falling edges; determining, for the input signal, one or more pulse widths measured between the locations of the rising edges and the falling edges; determining a downlink/uplink configuration associated with the input signal; determining that at least one of the one or more pulse widths is greater than a threshold; forming an estimated sync pulse; determining a special subframe configuration associated with the input signal; determining an offset; forming a regenerated sync pulse; determining, using an error detector, an error between the estimated sync pulse and the regenerated sync pulse; determining that the error is less than an error threshold; and providing the regenerated sync pulse as the synchronization switching pulse. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A system for generating synchronized signals, the system including:
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a digital power meter including a first input port and a second input port, the first input port being configured to detect an input signal and the second input port being configured to receive a power threshold level, wherein the digital power meter determines that a power level associated with the input signal exceeds the power threshold level and outputs an estimated sync pulse; a sync debug module coupled to the digital power meter and configured to determine a width of the estimated sync pulse; an error detector coupled to the digital power meter and configured to determine a calculated error between the estimated sync pulse and an expected time of a subframe; a first reset module coupled to the sync debug module and configured to transmit a reset signal to the sync debug module at an interval corresponding to the expected time of the subframe; a sync pulse regenerator coupled to the error detector and configured to output a regenerated sync pulse; and an offset controlled reset module coupled to the sync pulse regenerator. - View Dependent Claims (8, 9, 10, 11, 12, 13)
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14. A method of detecting a synchronization switching pulse in a time division duplexing (TDD) system, the method comprising:
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receiving an input signal; detecting a power level associated with the input signal using a digital power meter; determining a configuration associated with the input signal; determining that a pulse width associated with the input signal is greater than a threshold; determining an offset associated with a special subframe configuration; generating an estimated sync pulse; forming a regenerated sync pulse; determining an error between the estimated sync pulse and the regenerated sync pulse; determining that the error is less than a threshold;
providing the regenerated sync pulse as the synchronization switching pulse; andproviding a lock detect. - View Dependent Claims (15, 16, 17, 18)
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Specification