Channel calibration in high density antenna systems
AssigneeCohere Technologies, Inc.
InventorsYoav Hebron, Shlomo Selim Rakib, Shachar Kons
Life of this patent
Estimating the term…
Abstract
Methods, systems and devices for wireless communication are described. An example method for wireless communication includes controlling a sweep of channel estimation transmissions across a two-dimensional antenna array comprising N horizontal antennas and M vertical antennas according to an operational condition in a wireless communication network. In one example, a pattern used for the sweep sweeps across horizontal antennas followed by a sweep across vertical antennas. In another example, a pattern used for the sweep sweeps across vertical antennas followed by a sweep across horizontal antennas.
Claims18
A method of wireless communication, comprising:
- determining, by a transmitting device configured with N horizontal antennas and M vertical antennas, a sequence of channel estimation signal transmissions, wherein N and M are integers greater than 1;
- and
- performing, based on the sequence, transmissions of the channel estimation signal transmissions to a receiving device,
- wherein the sequence is based on relative channel variations in a vertical direction or in a horizontal direction, and
- wherein the sequence comprises performing:
- (a) a sweep across the N horizontal antennas followed by repeating sweeps across the M vertical antennas, or
- (b) a sweep across the M vertical antennas followed by repeating sweeps across the N horizontal antennas.
A method of reducing data communication between a distributed unit (DU) and a centralized unit (CU), comprising:
- cycling transmission of a reference signal through a first group of elevation layers of an antenna array and collecting a corresponding channel feedback;
- and
- progressively sweeping across different elevation layers and collecting the corresponding channel feedback,
- wherein the antenna array comprises N horizontal antennas and M vertical antennas, wherein N and M are integers greater than 1, and
- wherein progressively sweeping across the different elevation layers is based on relative channel variations in a vertical direction or in a horizontal direction, and comprises:
- (a) sweeping across (N−1) horizontal antennas followed by repeating sweeps across the M vertical antennas, or
- (b) sweeping across (M−1) vertical antennas followed by repeating sweeps across the N horizontal antennas.
A transmitting device for wireless communication configured with N horizontal antennas and M vertical antennas, comprising:
- at least one processor configured to cause the transmitting device to implement a method comprising:
- determining a sequence of channel estimation signal transmissions;
- and
- performing, based on the sequence, transmissions of the channel estimation signal transmissions to a receiving device,
- wherein N and M are integers greater than 1,
- wherein the sequence is based on relative channel variations in a vertical direction or in a horizontal direction, and
- wherein the sequence comprises performing:
- (a) a sweep across the N horizontal antennas followed by repeating sweeps across the M vertical antennas, or
- (b) a sweep across the M vertical antennas followed by repeating sweeps across the N horizontal antennas.
Dependencies are inferred from the claim text.