Method and system for identifying occurrence of shadowing phenomenon during wireless communications
First Claim
1. A method for identifying occurrence of shadowing phenomenon to be implemented using a wireless communications system that includes a signal-transmitting device and a signal-receiving device, the signal-receiving device periodically executing a synchronization process to evaluate quality of wireless communications conducted through a signal transmission path between the signal-transmitting device and the signal-receiving device, a set of signal-state estimated values that includes at least a phase parameter and a power parameter being generated during each synchronization process, said method comprising the steps of:
- a) collecting the phase parameters for a number of the synchronization processes;
b) generating a set of Poincaré
coordinate data from the phase parameters collected in step a);
c) analyzing distribution of the set of Poincaré
coordinate data generated in step b) on a Poincaré
map; and
d) determining that the signal transmission path is experiencing a shadowing phenomenon when the set of Poincaré
coordinate data generated in step b) has a non-elliptical distribution on the Poincaré
map, and that the signal transmission path is not experiencing the shadowing phenomenon when the set of Poincaré
coordinate data generated in step b) has an elliptical distribution on the Poincaré
map.
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Accused Products
Abstract
A method for identifying occurrence of shadowing phenomenon is to be implemented using a wireless communications system that includes signal transmitting and receiving devices. The signal-receiving device periodically executes a synchronization process to evaluate quality of wireless communications conducted through a signal transmission path between the signal transmitting and receiving devices. A set of signal-state estimated values that includes phase and power parameters is generated during each synchronization process. The method includes: collecting the phase parameters for a number of the synchronization processes; generating a set of Poincaré coordinate data from the collected phase parameters; analyzing distribution of the set of Poincaré coordinate data on a Poincaré map; and determining that the signal transmission path is experiencing a shadowing phenomenon in case of a non-elliptical distribution.
4 Citations
12 Claims
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1. A method for identifying occurrence of shadowing phenomenon to be implemented using a wireless communications system that includes a signal-transmitting device and a signal-receiving device, the signal-receiving device periodically executing a synchronization process to evaluate quality of wireless communications conducted through a signal transmission path between the signal-transmitting device and the signal-receiving device, a set of signal-state estimated values that includes at least a phase parameter and a power parameter being generated during each synchronization process, said method comprising the steps of:
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a) collecting the phase parameters for a number of the synchronization processes; b) generating a set of Poincaré
coordinate data from the phase parameters collected in step a);c) analyzing distribution of the set of Poincaré
coordinate data generated in step b) on a Poincaré
map; andd) determining that the signal transmission path is experiencing a shadowing phenomenon when the set of Poincaré
coordinate data generated in step b) has a non-elliptical distribution on the Poincaré
map, and that the signal transmission path is not experiencing the shadowing phenomenon when the set of Poincaré
coordinate data generated in step b) has an elliptical distribution on the Poincaré
map. - View Dependent Claims (2, 3, 4, 5)
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6. A signal-receiving device capable of identifying occurrence of shadowing phenomenon and adapted for use in a wireless communications system, the wireless communications system including a signal-transmitting device capable of wireless communications with said signal-receiving device, said signal-receiving device comprising:
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a main system for periodically executing a synchronization process to evaluate quality of wireless communications conducted through a signal transmission path between the signal-transmitting device and said signal-receiving device, a set of signal-state estimated values that includes at least a phase parameter and a power parameter being generated during each synchronization process; and an identification module coupled to said main system and configured to collect the phase parameters for a number of the synchronization processes, to generate a set of Poincaré
coordinate data from the phase parameters collected thereby, to analyze distribution of the set of Poincaré
coordinate data on a Poincaré
map, and to determine that the signal transmission path is experiencing a shadowing phenomenon when the set of Poincaré
coordinate data analyzed thereby has a non-elliptical distribution on the Poincaré
map, and that the signal transmission path is not experiencing the shadowing phenomenon when the set of Poincaré
coordinate data analyzed thereby has an elliptical distribution on the Poincaré
map. - View Dependent Claims (7)
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8. A data storage medium comprising program instructions to be executed by a signal-receiving device so as to enable the signal-receiving device to execute steps of a method for identifying occurrence of shadowing phenomenon, the signal-receiving device being used in a wireless communications system, the wireless communications system including a signal-transmitting device capable of wireless communications with the signal-receiving device, the signal-receiving device periodically executing a synchronization process to evaluate quality of wireless communications conducted through a signal transmission path between the signal-transmitting device and the signal-receiving device, a set of signal-state estimated values that includes at least a phase parameter and a power parameter being generated during each synchronization process, said method comprising the steps of:
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a) collecting the phase parameters for a number of the synchronization processes; b) generating a set of Poincaré
coordinate data from the phase parameters collected in step a);c) analyzing distribution of the set of Poincaré
coordinate data generated in step b) on a Poincaré
map; andd) determining that the signal transmission path is experiencing a shadowing phenomenon when the set of Poincaré
coordinate data generated in step b) has a non-elliptical distribution on the Poincaré
map, and that the signal transmission path is not experiencing the shadowing phenomenon when the set of Poincaré
coordinate data generated in step b) has an elliptical distribution on the Poincaré
map.
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9. A wireless communications system capable of identifying occurrence of shadowing phenomenon, comprising:
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user end equipment including a user signal-receiving device and a user signal-transmitting device; and system service end equipment including a system signal-transmitting device capable of wirelessly transmitting signals to be received by said user signal-receiving device, and a system signal-receiving device capable of wirelessly receiving signals transmitted by said user signal-transmitting device; wherein at least one of said user signal-receiving device and said system signal-receiving device periodically executes a synchronization process to evaluate quality of wireless communications conducted through a signal transmission path between said at least one of said user signal-receiving device and said system signal-receiving device, and the corresponding one of said system signal-transmitting device and said user signal-transmitting device, a set of signal-state estimated values that includes a phase parameter being generated during each synchronization process, said at least one of said user signal-receiving device and said system signal-receiving device collecting the phase parameters for a number of the synchronization processes, generating a set of Poincaré
coordinate data from the phase parameters collected thereby, analyzing distribution of the set of Poincaré
coordinate data generated thereby on a Poincaré
map, and determining that the signal transmission path is experiencing a shadowing phenomenon when the set of Poincaré
coordinate data analyzed thereby has a non-elliptical distribution on the Poincaré
map, and that the signal transmission path is not experiencing the shadowing phenomenon when the set of Poincaré
coordinate data analyzed thereby has an elliptical distribution on the Poincaré
map. - View Dependent Claims (10, 11, 12)
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Specification