System and method for side lobe suppression using controlled signal cancellation
First Claim
1. A method for selective suppression of sidelobe signals using controlled signal cancellation, the method comprising:
- receiving an indication that a signal from a single user equipment (UE) is received at each of two or more access points (APs) over the same channel, wherein the relatively stronger power signal is received over a primary lobe of a communication beam of one of the APs and the relatively weaker power signal is received over a side lobe of a communication beam of another one of the APs;
testing the efficacy of signal cancellation by turning signal cancellation on and off to measure the UE signals received at one of the APs; and
if interference is lower when signal cancellation is turned on, applying said signal cancellation for continued communication with said UE to cancel side lobe signals andif interference is lower when signal cancellation is turned off, communicating with said UE without applying said signal cancellation.
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Accused Products
Abstract
A system and method for selective suppression of sidelobe signals using controlled signal cancellation. An indication may be received from a single user equipment (UE) at each of two or more access points (APs) over the same channel. A relatively stronger power signal is received over a primary lobe of a communication beam of one of the APs and the relatively weaker power signal is received over a side lobe of a communication beam of another one of the APs. The efficacy of signal cancellation may be tested by turning signal cancellation on and off to measure the UE signals received at one of the APs. If interference is lower when signal cancellation is turned on, signal cancellation may be applied for continued communication with said UE to cancel side lobe signals and if interference is lower when signal cancellation is turned off, no signal cancellation may be applied.
270 Citations
24 Claims
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1. A method for selective suppression of sidelobe signals using controlled signal cancellation, the method comprising:
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receiving an indication that a signal from a single user equipment (UE) is received at each of two or more access points (APs) over the same channel, wherein the relatively stronger power signal is received over a primary lobe of a communication beam of one of the APs and the relatively weaker power signal is received over a side lobe of a communication beam of another one of the APs; testing the efficacy of signal cancellation by turning signal cancellation on and off to measure the UE signals received at one of the APs; and if interference is lower when signal cancellation is turned on, applying said signal cancellation for continued communication with said UE to cancel side lobe signals and if interference is lower when signal cancellation is turned off, communicating with said UE without applying said signal cancellation. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A method for selective suppression of sidelobe signals using controlled signal cancellation, the method comprising:
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transmitting/receiving signals to/from a plurality of access points (APs) along the direction of a plurality of (N) different respective beams, wherein each of the plurality of (N) beams includes a primary lobe providing relatively high signal power surrounded by two or more side lobes providing relatively low signal power, wherein a primary lobe of one beam is substantially separated from a primary lobe of another beam communicating over the same channel but at least partially overlapping one or more side lobes of the beam, determining if user equipment (UE) detected by two or more APs is communicating using a side lobe signal or a primary lobe signal, and applying signal cancellation to suppress the sidelobe signals if the UE is determined to communicate using a sidelobe signal but not applying signal cancellation if the UE is determined to communicate using a primary lobe signal. - View Dependent Claims (12)
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13. A system for selective suppression of sidelobe signals using controlled signal cancellation, the system comprising:
a processor configured to; receive an indication that a signal from a single user equipment (UE) is received at each of two or more access points (APs) over the same channel, wherein the relatively stronger power signal is received over a primary lobe of a communication beam of one of the APs and the relatively weaker power signal is received over a side lobe of a communication beam of another one of the APs; test the efficacy of signal cancellation by turning signal cancellation on and off to measure the UE signals received at one of the APs; and if interference is lower when signal cancellation is turned on, apply said signal cancellation for continued communication with said UE to cancel side lobe signals and if interference is lower when signal cancellation is turned off, communicate with said UE without applying said signal cancellation. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20, 21, 22)
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23. A system for selective suppression of sidelobe signals using controlled signal cancellation, the system comprising:
a processor configured to control an antenna array to; transmitting/receiving signals to/from a plurality of access points (APs) along the direction of a plurality of (N) different respective beams, wherein each of the plurality of (N) beams includes a primary lobe providing relatively high signal power surrounded by two or more side lobes providing relatively low signal power, wherein a primary lobe of one beam is substantially separated from a primary lobe of an adjacent beam communicating over the same channel but at least partially overlapping one or more side lobes of the adjacent beam, determine if user equipment (UE) detected by two or more APs is communicating using a side lobe signal or a primary lobe signal, and apply signal cancellation to suppress the sidelobe signals if the UE is determined to communicate using a sidelobe signal but not apply signal cancellation if the UE is determined to communicate using a primary lobe signal. - View Dependent Claims (24)
Specification