# US 2014/0192937 A1 · Reception device and reception method > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2014/0192937 A1 - Document ID: US20140192937A1 - Status: Published application - Kind: A1 - Application number: 14/143,743 - Filed: 2013-12-30 - Published: 2014-07-10 - Earliest claimed: 2013-01-10 - Assignees: Fujitsu Limited - Applicants: Fujitsu Limited - Inventors: Takashi SEYAMA; Takashi Dateki - Web page: https://patentgrep.com/patent/US20140192937A1 ## CPC - H04L 27/2647: {Arrangements specific to the receiver only (equalisation H04L27/01)} - H04L 5/005: {of common pilots, i.e. pilots destined for multiple users or terminals} - H04L 25/0204: {of multiple channels} - H04L 25/0224: {using sounding signals} - H04J 11/0023: {Interference mitigation or co-ordination (direct sequence spread spectrum [DSSS] systems H04B1/7097; frequency hopping H04B1/713; allocation criteria for ingress interference avoidance H04L5/0062; frequency allocation criteria for requirements on out-of-channel emissions H04L5/0066; arrangements for removing intersymbol interference or baseband equalisers H04L25/03006; peak power aspects in multicarrier modulation H04L27/2614; power management H04W52/00; traffic scheduling H04W72/54, H04W72/541)} - 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) ## Abstract A reception device including: an antenna configured to receive a radio signal including a radio frame that includes a plurality of symbols, and a processor configured to perform a first processing for estimating a first interference noise power for one or more first specified symbols of the plurality of symbols, each of the one or more first specified symbols including each of one or more reference signals respectively, and to perform a second processing for estimating a second interference noise power for one or more second specified symbols of the plurality of symbols, each of the one or more second specified symbols including no reference signal, the second interference noise power differing from the first interference noise power. ## Claims ### Claim 1 A reception device comprising: an antenna configured to receive a radio signal including a radio frame that includes a plurality of symbols; and a processor configured to perform a first processing for estimating a first interference noise power for one or more first specified symbols of the plurality of symbols, each of the one or more first specified symbols including each of one or more reference signals respectively, and to perform a second processing for estimating a second interference noise power for one or more second specified symbols of the plurality of symbols, each of the one or more second specified symbols including no reference signal, the second interference noise power differing from the first interference noise power. ### Claim 2 (depends on 1) The reception device according to claim 1, wherein the processor is configured to perform both of the first processing and the second processing, when the reception device communicates with a transmission device and when another transmission device transmits no data in the radio frame. ### Claim 3 (depends on 2) The reception device according to claim 2, wherein the other transmission device transmits at least one reference signals in the radio frame. ### Claim 4 (depends on 2) The reception device according to claim 2, wherein the first processing includes a third processing and a fourth processing, the third processing is performed for estimating a third interference noise power for a third specified symbol of the one or more first specified symbols in which a reference signal is transmitted by the other transmission device when the radio frame transmitted from the other transmission device is any of types, the fourth processing is performed for estimating a fourth interference noise power for a fourth specified symbol of the one or more first specified symbols in which a reference signal is transmitted by the other transmission device when the radio frame transmitted from the other transmission device is a specified type of the types, and the processor is configured to estimate the first interference noise power by using the third interference noise power and the fourth interference noise power. ### Claim 5 (depends on 4) The reception device according to claim 4, wherein the first processing further includes a fifth processing, the fifth processing is performed for estimating a fifth interference noise power based on both the third specified symbol and the fourth specified symbol, the processor is configured to set the fifth interference noise power to the first interference noise power when a condition that the third interference noise power are close to the fourth interference noise power is satisfied. ### Claim 6 (depends on 1) The reception device according to claim 1, wherein the processor is configured to perform a channel estimation based on the one or more first specified symbols, and the processor is configured, in the second processing, to estimate the second interference noise power based on the one or more second specified symbols and the channel estimation. ### Claim 7 (depends on 1) The reception device according to claim 1, wherein the plurality of symbols is a plurality of Orthogonal Frequency Division Multiplexing (OFDM) symbols. ### Claim 8 A reception device comprising: a memory; and a processor configured to receive a radio signal including a radio frame that includes a plurality of symbols, to perform a first processing for estimating a first interference noise power for one or more first specified symbols of the plurality of symbols, each of the one or more first specified symbols including each of one or more reference signals respectively, and to perform a second processing for estimating a second interference noise power for one or more second specified symbols of the plurality of symbols, each of the one or more second specified symbols including no reference signal, the second interference noise power differing from the first interference noise power. ### Claim 9 A reception method comprising: receiving a radio signal including a radio frame that includes a plurality of symbols; performing a first processing for estimating a first interference noise power for one or more first specified symbols of the plurality of symbols, each of the one or more first specified symbols including each of one or more reference signals respectively; and performing a second processing for estimating a second interference noise power for one or more second specified symbols of the plurality of symbols, each of the one or more first specified symbols including no reference signal, the second interference noise power differing from the first interference noise power. ### Claim 10 (depends on 9) The reception method according to claim 9, wherein the processor is configured to perform both of the first processing and the second processing, when communicating with a transmission device and when another transmission device transmits no data in the radio frame. ### Claim 11 (depends on 9) The reception method according to claim 9, wherein the other transmission device transmits at least one reference signals in the radio frame. ### Claim 12 (depends on 9) The reception method according to claim 9, wherein the first processing includes a third processing and a fourth processing, the third processing is performed for estimating a third interference noise power for a third specified symbol of the one or more first specified symbols in which a reference signal is transmitted by the other transmission device when the radio frame transmitted from the other transmission device is any of types, the fourth processing is performed for estimating a fourth interference noise power for a fourth specified symbol of the one or more first specified symbols in which a reference signal is transmittable by the other transmission device when the radio frame transmitted from the other transmission device is a specified type of the types, and the estimating of the first interference noise power is based on the third interference noise power and the fourth interference noise power. ### Claim 13 (depends on 12) The reception method according to claim 12, wherein the first processing further includes a fifth processing, the fifth processing is performed for estimating a fifth interference noise power based on both the third specified symbol and the fourth specified symbol, the estimating of the first interference noise power sets the fifth interference noise power to the first interference noise power when a condition that the third interference noise power are close to the fourth interference noise power is satisfied. ### Claim 14 (depends on 9) The reception method according to claim 9, further comprising: performing a channel estimation based on the one or more first specified symbols, wherein in the second processing, the estimating of the second interference noise power is based on the one or more second specified symbols and the channel estimation. ### Claim 15 (depends on 9) The reception method according to claim 9, wherein the plurality of symbols is a plurality of Orthogonal Frequency Division Multiplexing (OFDM) symbols.