Abstract: An apparatus and a method are provided. The apparatus includes a light source configured to project light in a changing pattern that reduces the light's noticeability; collection optics through which light passes and forms an epipolar plane with the light source; and an image sensor configured to receive light passed through the collection optics to acquire image information and depth information simultaneously. The method includes projecting light by a light source in a changing pattern that reduces the light's noticeability; passing light through collection optics and forming an epipolar plane between the collection optics and the light source; and receiving in an image sensor light passed through the collection optics to acquire image information and depth information simultaneously.

Abstract: An apparatus and a method are provided. The apparatus includes a light source configured to project light in a changing pattern that reduces the light's noticeability; collection optics through which light passes and forms an epipolar plane with the light source; and an image sensor configured to receive light passed through the collection optics to acquire image information and depth information simultaneously. The method includes projecting light by a light source in a changing pattern that reduces the light's noticeability; passing light through collection optics and forming an epipolar plane between the collection optics and the light source; and receiving in an image sensor light passed through the collection optics to acquire image information and depth information simultaneously.

Abstract: A method, user equipment (UE) and location server for estimating position of a UE based on observed angles of arrival. According to one embodiment, angles of arrival of signals from a plurality of base stations are received by a UE are observed by scanning for position reference signals (PRS) by adjusting a phase difference between antennas to cause a null of a beam of the UE to be incremented through an angular sector. For each of a plurality of base stations, an angle of arrival at which the null is steered when a PRS is suppressed by the null and a reference signal time difference, RSTD, are determined. Each angle of arrival and corresponding RSTD is transmitted to a location server which estimates UE position based on the observed angles of arrival. Further, the location server may instruct the UE to suppress a non-line-of-sight PRS signal.

Abstract: An apparatus and method for determining a distance to an object using a binary, event-based image sensor. In one aspect, the image sensor includes memory circuitry and address decode circuitry. In one aspect, activation of a photodiode of the image sensor array by receipt of one or more photons is able to be used directly as an input to logic circuitry. In one embodiment, the image sensor includes photodiodes operating in an avalanche photodiode mode or Geiger mode. In one embodiment, the imaging sensor includes photodiodes operating as thresholded integrating pixels. The imaging sensor can be fabricated from one or more substrates having at least a first and a second voltage portion.

Abstract: A method, user equipment (UE) and location server for estimating position of a UE based on observed angles of arrival. According to one embodiment, angles of arrival of signals from a plurality of base stations are received by a UE are observed by scanning for position reference signals (PRS) by adjusting a phase difference between antennas to cause a null of a beam of the UE to be incremented through an angular sector. For each of a plurality of base stations, an angle of arrival at which the null is steered when a PRS is suppressed by the null and a reference signal time difference, RSTD, are determined. Each angle of arrival and corresponding RSTD is transmitted to a location server which estimates UE position based on the observed angles of arrival. Further, the location server may instruct the UE to suppress a non-line-of-sight PRS signal.

Abstract: An apparatus and a method are provided. The apparatus includes a light source configured to project light in a changing pattern that reduces the light's noticeability; collection optics through which light passes and forms an epipolar plane with the light source; and an image sensor configured to receive light passed through the collection optics to acquire image information and depth information simultaneously. The method includes projecting light by a light source in a changing pattern that reduces the light's noticeability; passing light through collection optics and forming an epipolar plane between the collection optics and the light source; and receiving in an image sensor light passed through the collection optics to acquire image information and depth information simultaneously.

Abstract: An apparatus and method for determining a distance to an object using a binary, event-based image sensor. In one aspect, the image sensor includes memory circuitry and address decode circuitry. In one aspect, activation of a photodiode of the image sensor array by receipt of one or more photons is able to be used directly as an input to logic circuitry. In one embodiment, the image sensor includes photodiodes operating in an avalanche photodiode mode or Geiger mode. In one embodiment, the imaging sensor includes photodiodes operating as thresholded integrating pixels. The imaging sensor can be fabricated from one or more substrates having at least a first and a second voltage portion.

Abstract: An apparatus and method for determining a distance to an object using a binary, event-based image sensor. In one aspect, the image sensor includes memory circuitry and address decode circuitry. In one aspect, activation of a photodiode of the image sensor array by receipt of one or more photons is able to be used directly as an input to logic circuitry. In one embodiment, the image sensor includes photodiodes operating in an avalanche photodiode mode or Geiger mode. In one embodiment, the imaging sensor includes photodiodes operating as thresholded integrating pixels. The imaging sensor can be fabricated from one or more substrates having at least a first and a second voltage portion.

Abstract: An apparatus and method for determining a distance to an object using a binary, event-based image sensor. In one aspect, the image sensor includes memory circuitry and address decode circuitry. In one aspect, activation of a photodiode of the image sensor array by receipt of one or more photons is able to be used directly as an input to logic circuitry. In one embodiment, the image sensor includes photodiodes operating in an avalanche photodiode mode or Geiger mode. In one embodiment, the imaging sensor includes photodiodes operating as thresholded integrating pixels. The imaging sensor can be fabricated from one or more substrates having at least a first and a second voltage portion.

Abstract: An apparatus and method for determining a distance to an object using a binary, event-based image sensor. In one aspect, the image sensor includes memory circuitry and address decode circuitry. In one aspect, activation of a photodiode of the image sensor array by receipt of one or more photons is able to be used directly as an input to logic circuitry. In one embodiment, the image sensor includes photodiodes operating in an avalanche photodiode mode or Geiger mode. In one embodiment, the imaging sensor includes photodiodes operating as thresholded integrating pixels. The imaging sensor can be fabricated from one or more substrates having at least a first and a second voltage portion.

Abstract: A method of calibrating transmit and/or receive paths of an antenna comprising at least two antenna columns, each of which comprising two co-located sub-arrays of antenna elements. The method includes the steps of transmitting a measurement signal on at least one of the antenna elements, and receiving a representation of the measurement signal on at least one other of the antenna elements, the representation comprising at least a mutual coupling component dependent on the mutual coupling between the at least one antenna element and the at least one other antenna element.

Abstract: Using the same image sensor to capture a two-dimensional (2D) image and three-dimensional (3D) depth measurements for a 3D object. A laser point-scans the surface of the object with light spots, which are detected by a pixel array in the image sensor to generate the 3D depth profile of the object using triangulation. Each row of pixels in the pixel array forms an epipolar line of the corresponding laser scan line. Timestamping provides a correspondence between the pixel location of a captured light spot and the respective scan angle of the laser to remove any ambiguity in triangulation. An Analog-to-Digital Converter (ADC) in the image sensor operates as a Time-to-Digital Converter (TDC) to generate timestamps. When the epipolar line is misaligned or curved, multiple TDC arrays acquire timestamps of multiple pixels (in multiple rows) substantially simultaneously. Multiple timestamp values are reconciled to obtain a single timestamp value for a light spot.

Abstract: An apparatus and a method are provided. The apparatus includes a light source configured to project light in a changing pattern that reduces the light's noticeability; collection optics through which light passes and forms an epipolar plane with the light source; and an image sensor configured to receive light passed through the collection optics to acquire image information and depth information simultaneously. The method includes projecting light by a light source in a changing pattern that reduces the light's noticeability; passing light through collection optics and forming an epipolar plane between the collection optics and the light source; and receiving in an image sensor light passed through the collection optics to acquire image information and depth information simultaneously.

Abstract: Using the same image sensor to capture a two-dimensional (2D) image and three-dimensional (3D) depth measurements for a 3D object. A laser point-scans the surface of the object with light spots, which are detected by a pixel array in the image sensor to generate the 3D depth profile of the object using triangulation. Each row of pixels in the pixel array forms an epipolar line of the corresponding laser scan line. Timestamping provides a correspondence between the pixel location of a captured light spot and the respective scan angle of the laser to remove any ambiguity in triangulation. An Analog-to-Digital Converter (ADC) in the image sensor operates as a Time-to-Digital Converter (TDC) to generate timestamps. When the epipolar line is misaligned or curved, multiple TDC arrays acquire timestamps of multiple pixels (in multiple rows) substantially simultaneously. Multiple timestamp values are reconciled to obtain a single timestamp value for a light spot.

Abstract: A method, user equipment (UE) and location server for estimating position of a UE based on observed angles of arrival. According to one embodiment, angles of arrival of signals from a plurality of base stations are received by a UE are observed by scanning for position reference signals (PRS) by adjusting a phase difference between antennas to cause a null of a beam of the UE to be incremented through an angular sector. For each of a plurality of base stations, an angle of arrival at which the null is steered when a PRS is suppressed by the null and a reference signal time difference, RSTD, are determined. Each angle of arrival and corresponding RSTD is transmitted to a location server which estimates UE position based on the observed angles of arrival. Further, the location server may instruct the UE to suppress a non-line-of-sight PRS signal.

Abstract: Systems and methods for use in CDMA antenna systems are provided in which signals each having a common overhead component are transmitted on a set of adjacent beams of a sector with a micro-timing offset between signals transmitted on adjacent pairs of beams which is large enough that destructive cancellation substantially does not occur between the pair of beams.

Abstract: A node (28) of a radio access network (20) communicates over a radio interface (32) with a wireless terminal (30). The node (28) comprises a transmitter (34) and a controller (40). The transmitter (34) selectively operates in plural multiple input multiple output (MIMO) modes for downlink transmission over the radio interface (32). The controller (40) uses both a terminal speed value and a throughput value to make a determination when to switch between the plural multiple input multiple output (MIMO) modes for communicating with the wireless terminal. The plural MIMO modes comprise a first mode and a second mode. In the first mode open loop MIMO operates with cyclical diversity delay. In the second mode open loop MIMO operates without cyclical diversity delay. Although operating in open loop MIMO, advantages such as those of closed loop MIMO are realized.

Abstract: The invention relates to a method and apparatus for determining whether two user equipments (UEs) in a wireless network can be co-scheduled by an uplink scheduler of a base station. The method includes: the determination of a steering vector for each of a plurality of user equipments to be considered; and, for each pair of the user equipments, the determination of a corresponding orthogonality factor based on the steering vectors of the user equipments comprising the pair. A pair of user equipments may be selected for co-scheduling based on the orthogonality factors. For example, a pair of user equipments may be co-scheduled if its orthogonality factor is below a threshold. As another example, a pair of user equipments that has the lowest of the orthogonality factors may be co-scheduled.

Abstract: The invention relates to a method and apparatus for determining whether two user equipments (UEs) in a wireless network can be co-scheduled by an uplink scheduler. The method includes the determination of orthogonality factors for each pair of equipments to be considered and, from the orthogonality factors, selecting UEs to be co-scheduled.

Abstract: Determination of an impairment compensation matrix for compensation of impairments in an antenna array is disclosed. A plurality of different combinations of multi-signal transmissions which form at least one null at a respective location of a plurality of locations is determined. Each combination includes a multi-signal transmission that comprises at least two concurrent signal transmissions from at least two antenna subarrays of N antenna subarrays and the respective location. Based on signal characteristics associated with the plurality of different combinations of multi-signal transmissions and an expected signal reception at the plurality of locations, an impairment matrix that identifies an effect of impairments among the N antenna subarrays is determined. The impairment compensation matrix is determined based on the impairment matrix.