# US 2014/0192919 A1 · Reference signal design for lte a > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2014/0192919 A1 - Document ID: US20140192919A1 - Status: Published application - Kind: A1 - Application number: 14/205,808 - Filed: 2014-03-12 - Published: 2014-07-10 - Earliest claimed: 2009-09-17 - Assignees: QUALCOMM Incorporated - Applicants: QUALCOMM Incorporated - Inventors: Juan Montojo; Ravi Palanki; Amir Farajidana; Kapil Bhattad - Web page: https://patentgrep.com/patent/US20140192919A1 ## CPC - H04B 7/061: {using feedback from receiving side} - H04B 7/0691: {using subgroups of transmit antennas} - H04L 5/0091: {Signalling for the administration of the divided path, e.g. signalling of configuration information} - H04W 72/1273: of downlink data flows - H04B 7/063: {Parameters other than those covered in groups H04B7/0623 - H04B7/0634, e.g. channel matrix rank or transmit mode selection} - H04B 7/0632: {Channel quality parameters, e.g. channel quality indicator [CQI]} - H04B 7/0634: {Antenna weights or vector/matrix coefficients} - H04B 7/0671: {using different delays between antennas} - H04B 7/0874: {using subgroups of receive antennas} - H04B: TRANSMISSION - H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M) - H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72) ## Abstract Systems and methods are disclosed that facilitate creating antenna ports to correspond to two or more groups of user equipment. The systems and methods can organize two or more groups of user equipment and signal to each of the two or more groups a respective antenna port. The systems and methods can further communicate mapping information, a reference signal, or delay related to a linear combination in order to identify antenna ports. Based on such communicated information, the reference signal can be decoded in order to identify each antenna port. ## Claims ### Claim 1 A method used in a wireless communications system that facilitates identifying a set of antenna ports, comprising: receiving a mapping information that includes at least one of a delay or a linear combination employed to transmit a reference signal related to the set of antenna ports; receiving a reference signal related to the antenna ports; and decoding, based on the mapping information, the reference signal related to the set of antenna ports in order to identify each antenna port. ### Claim 2 (depends on 1) The method of claim 1, further comprising estimating a channel corresponding to each of a transmit antenna ports. ### Claim 3 (depends on 1) The method of claim 1, further comprising: receiving the mapping information that relates to at least one physical transmit antennas to antenna ports of a group of UEs; and estimating channel of the physical transmit antennas. ### Claim 4 (depends on 1) The method of claim 1, wherein the linear combination is cyclic delay diversity (CDD). ### Claim 5 An apparatus for wireless communication, comprising: at least one processor configured to: receive a mapping information that includes at least one of a delay or a linear combination employed to transmit a reference signal related to a set of antenna ports; receive a reference signal related to the antenna ports; and decode, based on the mapping information, the reference signal related to the set of antenna ports in order to identify each antenna port; and a memory coupled to the at least one processor. ### Claim 6 (depends on 5) The apparatus of claim 5, wherein the at least one processor is further configured to: receive the mapping information related to at least one physical transmit antennas to antenna ports of a group of UEs; and estimate channel of the physical transmit antennas. ### Claim 7 (depends on 5) The apparatus of claim 5, wherein the at least one processor is further configured to estimate a channel corresponding to each of a transmit antenna ports. ### Claim 8 (depends on 5) The apparatus of claim 5, wherein the linear combination is cyclic delay diversity (CDD). ### Claim 9 A wireless communications apparatus that identifying a set of antenna ports within a wireless communications environment, comprising: means for receiving a mapping information that includes at least one of a delay or a linear combination employed to transmit a reference signal related to the set of antenna ports; means for receiving a reference signal related to the antenna ports; and means for decoding, based on the mapping information, the reference signal related to the set of antenna ports in order to identify each antenna port. ### Claim 10 (depends on 9) The wireless communications apparatus of claim 9, further comprising: means for receiving the mapping information related to at least one physical transmit antennas to antenna ports of a group of UEs; and means for estimating channel of the physical transmit antennas. ### Claim 11 (depends on 9) The wireless communications apparatus of claim 9, further comprising means for estimating a channel corresponding to each of a transmit antenna ports. ### Claim 12 (depends on 9) The wireless communications apparatus of claim 9, wherein the linear combination is cyclic delay diversity (CDD). ### Claim 13 A non-transitory computer-readable medium comprising: code for causing at least one computer to receive a mapping information that includes at least one of a delay or a linear combination employed to transmit a reference signal related to a set of antenna ports; code for causing at least one computer to receive a reference signal related to the antenna ports; and code for causing at least one computer to decode, based on the mapping information, the reference signal related to the set of antenna ports in order to identify each antenna port. ### Claim 14 (depends on 13) The computer-readable medium of claim 13, further comprising: code for causing at least one computer to receive the mapping information related to at least one physical transmit antennas to antenna ports of a group of UEs; and code for causing at least one computer to estimate channel of the physical transmit antennas. ### Claim 15 (depends on 13) The computer-readable medium of claim 13, further comprising code for causing at least one computer to estimate a channel corresponding to each of a transmit antenna ports. ### Claim 16 (depends on 13) The computer-readable medium of claim 13, wherein the linear combination is cyclic delay diversity (CDD).