# US 2010/0164802 A1 · Arrangements for beam refinement in a wireless network > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2010/0164802 A1 - Document ID: US20100164802A1 - Status: Published application - Kind: A1 - Application number: 12/317,968 - Filed: 2008-12-31 - Published: 2010-07-01 - Earliest claimed: 2008-12-31 - Assignees: Intel Corporation - Inventors: Qinghua Li; Huaning Niu - Web page: https://patentgrep.com/patent/US20100164802A1 ## CPC - H04W 72/046: {the resource being in the space domain, e.g. beams} - H01Q 1/246: {specially adapted for base stations} - H01Q 3/30: varying the {relative} phase {between the radiating elements of an array (H01Q3/2605, H01Q3/2658, H01Q3/2682, H01Q3/44 take precedence)} - H04B 7/0617: {for beam forming} - H04B 7/06958: {Multistage beam selection, e.g. beam refinement} - H04B 7/0857: {using maximum ratio combining techniques, e.g. signal-to- interference ratio [SIR], received signal strenght indication [RSS]} - H04B 7/088: {using beam selection} - H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72) - H01Q: ANTENNAS, i.e. RADIO AERIALS (radiators or antennas for microwave heating H05B6/72) - H04B: TRANSMISSION ## Abstract In some embodiments a beamforming method is disclosed. The method can include transmitting a beam having a channel defined by a maximum ration transmission vector (MRT) and receiving a first response from a receiver, where the first response has first information such as parameters related to the transmitted beam. Using the parameters and the initial MRT another directional transmission can be made. A similar process can determine a maximum combining ratio for a receiver. Set up communications between the transmitter and the receiver can be reduced by omitting data from transmission that can be acquired by other means such as from memory or calculations. Additional embodiments are also disclosed. ## Claims ### Claim 1 A beamforming method comprising: determining at least part of a maximum ratio combining (MRC) vector; determining at least part of a first maximum ratio transmission (MRT) vector; transmitting a sounding vector based on the first MRT vector; receiving the sounding vector utilizing the MRC vector; determine a parameter of the received sounding vector; transmitting the parameter back to a source; performing a directional transmission based on the parameter and the first MRT vector; and terminating the beamforming method when a predetermined condition is met. ### Claim 2 (depends on 1) The method of claim 1 wherein the parameter is beamformed channel gain. ### Claim 3 (depends on 1) The method of claim 1 wherein the parameter is a quantitized MRT vector based on the first MRT vector. ### Claim 4 (depends on 1) The method of claim 1 wherein the parameter is a computed component that is transmitted back as part of a MRT vector that is orthogonal to the first MRT vector such that the information exchanged between a transmitter and a receiver can be reduced. ### Claim 5 (depends on 1) The method of claim 1 wherein the second sounding vector is complimentary to a current and previous MRT vector. ### Claim 6 (depends on 1) The method of claim 1 wherein a receiver computes the second MRT vector and sends the MRT vector to the transmitter. ### Claim 7 (depends on 1) The method of claim 1 wherein a receiver only transmits a synthesized result and a transmitter computes a MRT vector based on the synthesized result. ### Claim 8 (depends on 1) The method of claim 1 wherein the directional transmission comprises vectors determined from one of a MRT or MRC vector that was utilized a previous transmission or calculation. ### Claim 9 (depends on 1) The method of claim 1 further comprising conducting a sector sweep. ### Claim 10 (depends on 1) The method of claim 1 wherein the predetermined condition is a convergence of transmit weight vector and a receive weight vector. ### Claim 11 (depends on 1) The method of claim 1 further comprising terminating the method after one of a predetermined number of steps or a signal to noise ratio. ### Claim 12 A system comprising: a beam controller to adjust a beam during the beam training sequence; a sensor to sense at least one channel parameter during the beam training sequence and to acquired data in response to beam training sequences a configuration module to control a plurality of beam training sequences; and a configuration module to configure a subsequent training transmission that will provide information related to convergence of transmit weights and receive weights, the configuration module to create a beam training sequence to be tested utilize data acquired from more than one past training transmission. ### Claim 13 (depends on 12) The system of claim 12, further comprising a transceiver and an antenna array coupled to the beam controller. ### Claim 14 (depends on 12) The system of claim 12, wherein the sensor is a signal to noise sensor or a signal to interference plus noise sensor. ### Claim 15 (depends on 12) The system of claim 12, wherein the beam training sequence comprises sending and receiving vectors tailored to converge the transmit and receive weights. ### Claim 16 A computer program product including a computer readable storage medium including instructions that, when executed by a processor cause the computer to: determine at least part of a maximum ratio combining (MRC) vector; determine at least part of a first maximum ratio transmission (MRT) vector; transmit a sounding vector based on the first MRT vector; receive the sounding vector utilizing the MRC vector; determine a parameter of the received sounding vector; transmit the parameter back to a source; perform a directional transmission based on the parameter and the first MRT vector; and terminate the beamforming method when a predetermined condition is met. ### Claim 17 (depends on 16) The computer program product of claim 16 that, when executed by a processor, causes the computer to compute the parameter which is a transmitted back as part of a MRT vector that is orthogonal to the first MRT vector such that the information exchanged between a transmitter and a receiver can be reduced. ### Claim 18 (depends on 16) The computer program product of claim 16 that, when executed by a processor, causes the computer to conduct a sector sweep. ### Claim 19 (depends on 16) The computer program product of claim 16 that, when executed by a processor, causes the computer to synthesize the first and second response at the receiver. ### Claim at position 20 (depends on 16) 20 The computer program product of claim 16 that, when executed by a processor, causes the computer to terminate the method in response to the detection of a predefined condition.