Access point (AP) angle of arrival (AoA) interference reduction
According to an aspect of an example, an access point (AP) may include a processing device and a transceiver. The processing device may be configured to detect an incumbent transmission from an incumbent device. The processing device may be configured to compute an angle of arrival between the AP and the incumbent transmission from the incumbent device. The processing device may be configured to generate an incumbent avoidance beam, wherein the incumbent avoidance beam is configured to transmit in one or more operating directions to facilitate avoidance of the incumbent device. The transceiver may be configured to transmit the incumbent avoidance beam.
1 . An access point (AP), comprising:
a processing device configured to:
detect one or more incumbent transmissions from an incumbent device;
estimate an angle of arrival at the AP of the one or more incumbent transmissions received from the incumbent device; and
generate an incumbent avoidance transmission radiation pattern in which radiated power is reduced toward the estimated angle of arrival to reduce interference at a receiver associated with the incumbent device; and
a transceiver configured to:
transmit a wireless signal according to the transmission radiation pattern in one or more transmission directions.
2 . The access point of claim 1 , wherein the transmission radiation pattern includes a low power indoor (LPI) notch toward the estimated angle of arrival at the AP and the one or more incumbent transmissions received from the incumbent device, the LPI notch having a power spectral density (PSD) of at most 5 dBm/MHz and an effective isotropic radiated power (EIRP) of at most 30 dBm for a 320-MHz channel, scaled per channel bandwidth.
3 . The access point of claim 1 , wherein the transmission radiation pattern includes a standard power notch in the one or more transmission directions, the standard power notch having an effective isotropic radiated power (EIRP) of at most 36 dBm.
4 . The access point of claim 1 , wherein the transmission radiation pattern includes an antenna null toward the angle of arrival at the AP and the one or more incumbent transmissions received from the incumbent device.
5 . The access point of claim 1 , wherein the incumbent transmission is detected using:
a correlation, determined by the processing device, the correlation being between the one or more incumbent transmissions and one or more of an incumbent preamble or an incumbent pilot of the one or more incumbent transmissions.
6 . The access point of claim 1 , wherein the processing device is further configured to:
receive, at the AP from an automatic frequency coordination (AFC) server, one or more incumbent signal parameters for the incumbent device within a communication range of the AP.
7 . The access point of claim 6 , wherein the one or more incumbent signal parameters include one or more of: a geolocation, a location confidence, an antenna height, a federal communications commission (FCC) identifier (ID), a serial number, interference data, distortion data, noise power data, environmental data, or angle of arrival data.
8 . The access point of claim 1 , wherein the processing device is further configured to:
receive, at the AP from an automatic frequency coordination (AFC) server, one or more of an AP location or an incumbent location.
9 . An access point (AP), comprising:
a processing device configured to:
receive, at the AP from an automatic frequency coordination (AFC) server, one or more incumbent signal parameters for an incumbent device;
estimate an angle of arrival at the AP of an incumbent transmission received from the incumbent device based on the one or more incumbent signal parameters; and
generate an incumbent avoidance transmission radiation pattern in which radiated power is reduced toward the estimated angle of arrival to reduce interference at a receiver associated with the incumbent device; and
a transceiver configured to:
transmit a wireless signal according to the transmission radiation pattern in one or more transmission directions.
10 . The access point of claim 9 , wherein the one or more incumbent signal parameters include one or more of: a geolocation, a location confidence, an antenna height, an federal communications commission (FCC) identifier (ID), a serial number, interference data, distortion data, noise power data, environmental data, or angle of arrival data.
11 . The access point of claim 9 , wherein the transmission radiation pattern includes a low power indoor (LPI) notch toward the estimated angle of arrival at the AP of the incumbent transmission received from the incumbent device, the LPI notch having a PSD of at most 5 dBm/MHz and an effective isotropic radiated power (EIRP) of at most 30 dBm for a 320-MHz channel, scaled per channel bandwidth.
12 . The access point of claim 9 , wherein the transmission radiation pattern includes a standard power notch in the one or more transmission directions, the standard power notch having an effective isotropic radiated power (EIRP) of at most 36 dBm.
13 . The access point of claim 9 , wherein the transmission radiation pattern includes an antenna null toward the estimated angle of arrival at the AP of the incumbent transmission received from the incumbent device.
14 . The access point of claim 9 , wherein the processing device is further configured to:
receive, at the AP from the AFC server, one or more of an AP location or an incumbent location.
15 . An access point (AP), comprising:
a transceiver configured to receive a backhaul transmission from a backhaul device; and
a processing device configured to:
detect the backhaul transmission from the backhaul device; and
estimate an angle of arrival at the AP of the backhaul transmission from the backhaul device, and
wherein the backhaul transmission is detected using one or more of:
an AP preamble in the backhaul transmission, or
a correlation, determined by the processing device, between the backhaul transmission and one or more of a backhaul preamble or a backhaul pilot.
16 . The access point of claim 15 , wherein the processing device is further configured to:
generate a backhaul avoidance transmission radiation pattern in which radiated power is reduced toward the estimated angle of arrival at the AP of the backhaul transmission, and to configure the transceiver to transmit according to the transmission radiation pattern in one or more transmission directions.
17 . The access point of claim 16 , wherein the transmission radiation pattern includes a low power indoor (LPI) notch oriented toward the estimated angle of arrival between the AP and the backhaul transmission of the backhaul device, the LPI notch having a PSD of at most 5 dBm/MHz and an effective isotropic radiated power (EIRP) of at most 30 dBm for a 320-MHz channel, scaled per channel bandwidth.
18 . The access point of claim 16 , wherein the transmission radiation pattern includes a standard power notch in the one or more transmission directions, the standard power notch having an effective isotropic radiated power (EIRP) of at most 36 dBm.
19 . The access point of claim 16 , wherein the transmission radiation pattern includes an antenna null toward the estimated angle of arrival at the AP of the backhaul transmission of the backhaul device.
20 . The access point of claim 16 , wherein the processing device is further configured to:
compute one or more of an AP location or a backhaul location based on the angle of arrival.