# US 12,192,037 B2 · Staggered pilot placement > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,192,037 B2 - Document ID: US12192037B2 - Status: Granted - Kind: B2 - Application number: 16/597,761 - Filed: 2019-10-09 - Published: 2020-02-06 - Granted: 2025-01-07 - Earliest claimed: 2015-12-18 - Assignees: QUALCOMM Incorporated - Applicants: QUALCOMM Incorporated - Inventors: Seyong Park; Wei Zeng; Joseph Binamira Soriaga; Jing Jiang; Tingfang Ji - Web page: https://patentgrep.com/patent/US12192037B2 ## CPC - H04L 27/2613: {Structure of the reference signals} - H04J 11/004: {using regenerative subtractive interference cancellation} - H04L 1/0071: {Use of interleaving (interleaving per se H03M13/27)} - H04L 5/0007: {the frequencies being orthogonal, e.g. OFDM(A) or DMT} - H04L 5/0048: {Allocation of pilot signals, i.e. of signals known to the receiver (allocation of control signalling H04L5/0053; use of control signalling H04L5/0091)} - H04L 5/0062: {Avoidance of ingress interference, e.g. ham radio channels} - H04W 88/02: Terminal devices - H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M) - H04J: MULTIPLEX COMMUNICATION (transmission in general H04B; peculiar to transmission of digital information H04L5/00; systems for the simultaneous or sequential transmission of more than one television signal H04N7/08; in exchanges H04Q11/00; stereophonic systems H04S) - H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72) ## Abstract In an aspect of the disclosure, a method, a computer-readable medium, and an apparatus are provided. The apparatus may be configured to receive a plurality of combined signals. Each combined signal may be on a tone of a plurality of tones. The apparatus may be configured to determine a first pilot signal on a first tone of the plurality of tones. The apparatus may be configured to generate an interference-reduced signal for the first tone by canceling the determined first pilot signal from a first combined signal on the first tone. ## Claims ### Claim 1 An apparatus for wireless communication, comprising: a processing system configured to: map, at a first user equipment (UE), a first set of pilot symbols and a first set of data symbols to a plurality of tones, each pilot symbol in the first set of pilot symbols being mapped on a tone that is used by a second UE to carry a data symbol, at least one pilot symbol in the first set of pilot symbols overlapping in time on the tone that is used by the second UE to carry the data symbol; and provide the mapped first set of pilot symbols and the mapped first set of data symbols for transmission over the plurality of tones, wherein the first set of pilot symbols are transmitted on tones shifted by a cyclic shift from a second set of pilot symbols that is concurrently transmitted by the second UE. ### Claim 2 (depends on 1) The apparatus of claim 1, wherein a data symbol in the first set of data symbols is mapped on a tone that is used by the second UE to carry a pilot symbol. ### Claim 3 (depends on 1) The apparatus of claim 1, wherein the processing system is further configured to receive the cyclic shift for staggering the first set of pilot symbols from a base station. ### Claim 4 (depends on 1) The apparatus of claim 1, wherein the cyclic shift for staggering the first set of pilot symbols is randomly selected from a set of cyclic shift values based on an identifier associated with the first UE. ### Claim 5 (depends on 1) The apparatus of claim 1, wherein the first set of data symbols is associated with a same code block. ### Claim 6 (depends on 1) The apparatus of claim 1, wherein the processing system is further configured to transmit the mapped first set of pilot symbols and the mapped first set of data symbols over the plurality of tones. ### Claim 7 A method for wireless communication, comprising: mapping, at a first user equipment (UE), a first set of pilot symbols and a first set of data symbols to a plurality of tones, each pilot symbol in the first set of pilot symbols being mapped on a tone that is used by a second UE to carry a data symbol, wherein at least one pilot symbol in the first set of pilot symbols is overlapping in time on the tone that is used by the second UE to carry the data symbol; and providing the mapped first set of pilot symbols and the mapped first set of data symbols for transmission over the plurality of tones, the first set of pilot symbols are transmitted on tones shifted by a cyclic shift from a second set of pilot symbols that is concurrently transmitted by the second UE. ### Claim 8 (depends on 7) The method of claim 7, wherein a data symbol in the first set of data symbols is mapped on a tone that is used by the second UE to carry a pilot symbol. ### Claim 9 (depends on 7) The method of claim 7, further comprising receiving the cyclic shift for staggering the first set of pilot symbols from a base station. ### Claim 10 (depends on 7) The method of claim 7 wherein the cyclic shift for staggering the first set of pilot symbols is randomly selected from a set of cyclic shift values based on an identifier associated with the first UE. ### Claim 11 (depends on 7) The method of claim 7, wherein the first set of data symbols is associated with a same code block. ### Claim 12 (depends on 7) The method of claim 7, further comprising: transmitting the mapped first set of pilot symbols and the mapped first set of data symbols over the plurality of tones. ### Claim 13 An apparatus for wireless communication, comprising: means for mapping, at a first user equipment (UE), a first set of pilot symbols and a first set of data symbols to a plurality of tones, each pilot symbol in the first set of pilot symbols being mapped on a tone that is used by a second UE to carry a data symbol, at least one pilot symbol in the first set of pilot symbols overlapping in time on the tone that is used by the second UE to carry the data symbol; and means for providing the mapped first set of pilot symbols and the mapped first set of data symbols for transmission over the plurality of tones, wherein the first set of pilot symbols are transmitted on tones shifted by a cyclic shift from a second set of pilot symbols that is concurrently transmitted by the second UE. ### Claim 14 (depends on 13) The apparatus of claim 13, wherein a data symbol in the first set of data symbols is mapped on a tone that is used by the second UE to carry a pilot symbol. ### Claim 15 (depends on 13) The apparatus of claim 13, further comprising: means for receiving the cyclic shift for staggering the first set of pilot symbols from a base station. ### Claim 16 (depends on 13) The apparatus of claim 13, wherein the cyclic shift for staggering the first set of pilot symbols is randomly selected from a set of cyclic shift values based on an identifier associated with the first UE. ### Claim 17 (depends on 13) The apparatus of claim 13, wherein the first set of data symbols is associated with a same code block. ### Claim 18 (depends on 13) The apparatus of claim 13, further comprising: means for transmitting the mapped first set of pilot symbols and the mapped first set of data symbols over the plurality of tones. ### Claim 19 A non-transitory computer-readable medium storing computer-executable code for wireless communication by an apparatus, comprising code to: map, at a first user equipment (UE), a first set of pilot symbols and a first set of data symbols to a plurality of tones, each pilot symbol in the first set of pilot symbols being mapped on a tone that is used by a second UE to carry a data symbol, at least one pilot symbol in the first set of pilot symbols overlapping in time on the tone that is used by the second UE to carry the data symbol; and provide the mapped first set of pilot symbols and the mapped first set of data symbols for transmission over the plurality of tones, wherein the first set of pilot symbols are transmitted on tones shifted by a cyclic shift from a second set of pilot symbols that is concurrently transmitted by the second UE. ### Claim 20 (depends on 19) The non-transitory computer-readable medium of claim 19, wherein a data symbol in the first set of data symbols is mapped on a tone that is used by the second UE to carry a pilot symbol. ### Claim 21 (depends on 19) The non-transitory computer-readable medium of claim 19, further comprising code to receive the cyclic shift for staggering the first set of pilot symbols from a base station. ### Claim 22 (depends on 19) The non-transitory computer-readable medium of claim 19, wherein the cyclic shift for staggering the first set of pilot symbols is randomly selected from a set of cyclic shift values based on an identifier associated with the first UE. ### Claim 23 (depends on 19) The non-transitory computer-readable medium of claim 19, wherein the first set of data symbols is associated with a same code block. ### Claim 24 (depends on 19) The non-transitory computer-readable medium of claim 19, further comprising code to transmit the mapped first set of pilot symbols and the mapped first set of data symbols over the plurality of tones.