# US 2014/0192927 A1 · Method and apparatus for selecting multi-antenna transmission mode in electronic device > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2014/0192927 A1 - Document ID: US20140192927A1 - Status: Published application - Kind: A1 - Application number: 14/103,071 - Filed: 2013-12-11 - Published: 2014-07-10 - Earliest claimed: 2013-01-09 - Assignees: Samsung Electronics Co., Ltd. - Applicants: Samsung Electronics Co., Ltd. - Inventors: Jin KIM - Web page: https://patentgrep.com/patent/US20140192927A1 ## CPC - H04B 7/0689: {using different transmission schemes, at least one of them being a diversity transmission scheme} - H01Q 1/243: {with built-in antennas} - H01Q 21/28: Combinations of substantially independent non-interacting antenna units or systems {(multiple beam H01Q25/00)} - H04B: TRANSMISSION - H01Q: ANTENNAS, i.e. RADIO AERIALS (radiators or antennas for microwave heating H05B6/72) ## Abstract A method for selecting a multi-antenna transmission mode of an electronic device is provided. The method includes determining, by using a detection signal from a sensor, whether there is a contact with a human body, changing a second transmission mode to a first transmission mode when there is a contact with a human body that affects the electromagnetic field around an antenna, and transmitting the same data stream through at least two antennas according to the first transmission mode. ## Claims ### Claim 1 A method for selecting a multi-antenna transmission mode in an electronic device, the method comprising: determining, by using a detection signal from a sensor, whether there is a contact with a human body that affects an electromagnetic field around an antenna; changing a second transmission mode to a first transmission mode if there is a contact with a human body that affects an electromagnetic field around an antenna; and transmitting a same data stream through two or more antennas according to the first transmission mode. ### Claim 2 (depends on 1) The method of claim 1, wherein the first transmission mode is a transmission mode of a spatial diversity scheme in which a same data stream is transmitted through the two or more antennas, and the second transmission mode is a transmission mode of a spatial multiplexing scheme in which different data streams are transmitted through the two or more antennas. ### Claim 3 (depends on 1) The method of claim 1, further comprising setting, to a slave antenna, one of the two antennas that is affected by the contact with a human body, and the other of the two antennas to a master antenna, if there is a contact with the human body that affects the electromagnetic field around the antenna. ### Claim 4 (depends on 3) The method of claim 3, wherein the master antenna performs both transmission and reception and the slave antenna performs just transmission. ### Claim 5 (depends on 1) The method of claim 1, further comprising selecting the second transmission mode of the spatial multiplexing scheme in which different streams are transmitted through the two or more antennas, if there is no contact with the human body that affects the electromagnetic field around the antenna. ### Claim 6 (depends on 1) The method of claim 1, wherein the sensor is a grip sensor, and wherein the determining, by using the detection signal from the sensor, of whether there is a contact with the human body that affects the electromagnetic field around the antenna comprises: detecting a change in pressure or in capacitance by using the grip sensor; and determining that there is a contact with the human body that affects the electromagnetic field around the antenna, if the change in pressure or in capacitance is equal to or greater than a threshold. ### Claim 7 A method of operating an electronic device, the method comprising: determining by using a detection signal from a sensor whether there is a contact with a human body that affects an electromagnetic field around an antenna; selecting a first transmission mode if there is a contact with the human body that affects the electromagnetic field around the antenna, and selecting a second transmission mode if there is no contact with the human body that affects the electromagnetic field around the antenna; and transmitting a data stream through two or more antennas according to the first or second transmission mode. ### Claim 8 (depends on 7) The method of claim 7, wherein the first transmission mode is a transmission mode of a spatial diversity scheme in which a same data stream is transmitted through the two or more antennas, and wherein the second transmission mode is a transmission mode of a spatial multiplexing scheme in which different data streams are transmitted through the two or more antennas. ### Claim 9 (depends on 7) The method of claim 7, further comprising setting, to a slave antenna, one of the two antennas that is affected by the contact with a human body, and the other of the two antennas to a master antenna, if there is a contact with the human body that affects the electromagnetic field around the antenna. ### Claim 10 (depends on 9) The method of claim 9, wherein the master antenna performs both transmission and reception and the slave antenna performs transmission. ### Claim 11 (depends on 7) The method of claim 7, wherein the sensor is a grip sensor, and wherein the determining, by using the detection signal from the sensor, of whether there is a contact with the human body that affects the electromagnetic field around the antenna comprises: detecting a change in pressure or in capacitance by using the grip sensor; and determining that there is a contact with the human body, if the change in pressure or in capacitance is equal to or greater than a threshold. ### Claim 12 An electronic device comprising: a sensor; one or more processors; a memory; and one or more programs stored in the memory and configured to be executed by the one or more processors, wherein the one or more programs comprise instructions to: determine, by using a detection signal from a sensor, whether there is a contact with a human body that affects an electromagnetic field around an antenna; change a second transmission mode to a first transmission mode if there is a contact with the human body; and transmit a same data stream through two or more antennas according to the first transmission mode. ### Claim 13 (depends on 12) The electronic device of claim 12, wherein the first transmission mode is a transmission mode of a spatial diversity scheme in which a same data stream is transmitted through the two or more antennas, and wherein the second transmission mode is a transmission mode of a spatial multiplexing scheme in which different data streams are transmitted through the two or more antennas. ### Claim 14 (depends on 12) The electronic device of claim 12, wherein the one or more programs further comprise an instruction to set, to a slave antenna, one of the two antennas that is affected by the contact with the human body, and the other of the two antennas to a master antenna, if there is a contact with the human body that affects the electromagnetic field around the antenna. ### Claim 15 (depends on 14) The electronic device of claim 14, wherein the master antenna performs both transmission and reception and the slave antenna performs transmission. ### Claim 16 (depends on 12) The electronic device of claim 12, wherein the one or more programs further comprise an instruction to select the second transmission mode of the spatial multiplexing scheme in which different data streams are transmitted through the two or more antennas, if there is no contact with the human body that affects the magnetic field around the antenna. ### Claim 17 (depends on 12) The electronic device of claim 12, wherein the sensor is a grip sensor, and wherein the one or more programs comprise instructions to: determine, by using the detection signal from the sensor, whether there is a contact with the human body that affects the electromagnetic field around the antenna; detect a change in pressure or in capacitance by using the grip sensor; and determine that there is a contact with the human body, if the change in pressure or in capacitance is equal to or greater than a threshold. ### Claim 18 An electronic device comprising: a sensor; one or more processors; a memory; and one or more programs stored in the memory and configured to be executed by the one or more processors, wherein the one or more programs comprise instructions to: determine, by using a detection signal from the sensor, whether there is a contact with a human body that affects an electromagnetic field around an antenna; select a first transmission mode if there is a contact with the human body that affects the electromagnetic field around the antenna and select a second transmission mode if there is no contact with the human body; and transmit a data stream through two or more antennas according to the first or second transmission mode. ### Claim 19 (depends on 18) The electronic device of claim 18, wherein the first transmission mode is a transmission mode of a spatial diversity scheme in which a same data stream is transmitted through the two or more antennas, and wherein the second transmission mode is a transmission mode of a spatial multiplexing scheme in which different data streams are transmitted through the two or more antennas. ### Claim 20 (depends on 18) The electronic device of claim 18, wherein the one or more programs further comprise an instruction to set, to a slave antenna, one of the two antennas that is affected by the contact with the human body, and the other of the two antennas to a master antenna, if there is a contact with the human body that affects the electromagnetic field around the antenna. ### Claim 21 (depends on 20) The electronic device of claim 20, wherein the master antenna performs both transmission and reception and the slave antenna performs transmission. ### Claim 22 (depends on 18) The electronic device of claim 18, wherein the sensor is a grip sensor, and wherein the program comprises instructions to: determine, by using the detection signal from the sensor, whether there is a contact with the human body that affects the electromagnetic field around the antenna; detect a change in pressure or in capacitance by using the grip sensor; and determine that there is a contact with the human body, if the change in pressure or in capacitance is equal to or greater than a threshold.