# US 8,787,142 B2 · Transmission and reception of a wideband signal with narrowband interference > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 8,787,142 B2 - Document ID: US8787142B2 - Status: Granted - Kind: B2 - Application number: 13/063,841 - Filed: 2009-09-15 - Published: 2011-09-15 - Granted: 2014-07-22 - Earliest claimed: 2008-09-15 - Assignees: Nokia Siemens Networks Oy - Applicants: Oliver Cyranka; Martin Goldberg; Helmut Heinz; Rupert Herzog; Thomas Hindelang; Sabine Roessel; Wolfgang Zirwas - Inventors: Oliver Cyranka; Martin Goldberg; Helmut Heinz; Rupert Herzog; Thomas Hindelang; Sabine Roessel; Wolfgang Zirwas - Web page: https://patentgrep.com/patent/US8787142B2 ## CPC - H04L 27/2647: {Arrangements specific to the receiver only (equalisation H04L27/01)} - H04J 11/004: {using regenerative subtractive interference cancellation} - H04L 27/2626: {Arrangements specific to the transmitter only} - H04W 16/14: Spectrum sharing arrangements {between different networks} - H04L 5/0066: {Requirements on out-of-channel emissions} - H04W 84/042: {Public Land Mobile systems, e.g. cellular systems} - 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 It is disclosed a method including accommodating, in frequency domain, a first bandwidth of a first carrier signal with respect to a second bandwidth of a second carrier signal such that the first bandwidth adjoins to or overlaps the second bandwidth, the first bandwidth being greater than the second bandwidth. In a further aspect, prior to the transmission, the interference of the modulated second carrier signal is subtracted from each of the plurality of subcarrier signals of the first carrier signal. ## Claims ### Claim 1 A method, comprising: retrieving a first carrier signal from a received transmission signal comprising a plurality of subcarrier signals of the first carrier signal, each of which subcarrier signals being interfered by an effective interference of a modulated second carrier signal wherein the retrieving is performed by subtracting a generated replica of the second carrier signal from the received transmission signal; prior to the subtracting, generating the replica of the second carrier signal by: demodulating the decoded transmission signal; decoding the received transmission signal; and filtering the demodulated and decoded transmission signal for removing the subcarrier signals overlapping the modulated second carrier signal in bandwidth. ### Claim 2 (depends on 1) The method according to claim 1, further comprising, prior to the retrieving, receiving the transmission signal. ### Claim 3 (depends on 1) The method according to claim 1, wherein the retrieving further comprises, after the subtracting, transforming a signal resulting from the subtracting from a time domain into a frequency domain. ### Claim 4 (depends on 2) The method according to claim 2, further comprising, after the receiving and prior to the retrieving, queuing the received transmission signal. ### Claim 5 (depends on 1) The method according to claim 1, wherein the retrieving is performed by: decoding the received transmission signal; filtering the decoded transmission signal for removing the subcarrier signals overlapping the modulated second carrier signal in bandwidth; detecting a midamble in at least one signal burst of the second carrier signal based on a reference midamble; extracting the midamble from the current signal burst; estimating current channel information from the extracted midamble; and processing symbols sent via the first carrier signal based on the estimated current channel information during a subsequent burst of the second carrier signal after the at least one burst. ### Claim 6 (depends on 3) The method according to claim 3, wherein at least one of the following applies: the first carrier signal is a long term evolution carrier signal; the second carrier signal is a global system for mobile communications carrier signal; the transforming from time domain into frequency domain is one of a Fourier transformation and a fast Fourier transformation; the transforming from frequency domain into time domain is one of an inverse Fourier transformation and an inverse fast Fourier transformation; the timing information is an orthogonal frequency division multiplexing guard interval; the channel information is channel state information; and the queuing is performed based on a first in first out queue. ### Claim 7 (depends on 1) The apparatus according to claim 1, further comprising means for receiving the transmission signal prior to the retrieving performed by the means for retrieving. ### Claim 8 (depends on 1) The method according to claim 1 performed with a non-transitory computer readable medium storing a computer program product, the computer program product executed by a processor. ### Claim 9 (depends on 1) The method according to claim 1, wherein the first carrier signal and the second carrier signal are communicated using different access technologies. ### Claim 10 (depends on 1) The method according to claim 1, wherein the first carrier signal and the second carrier signal are transmitted from a single antenna or from multiple different antenna, respectively, for transmitting. ### Claim 11 (depends on 1) The method according to claim 1, wherein the first carrier signal and the second carrier signal are transmitted in a first bandwidth and a second bandwidth, respectively, and the first bandwidth adjoins to or overlaps the second bandwidth. ### Claim 12 An apparatus, comprising: means for retrieving a first carrier signal from a received transmission signal comprising a plurality of subcarrier signals of the first carrier signal each of which subcarrier signals being interfered by an effective interference of a modulated second carrier signal, wherein the means for retrieving further comprises means for subtracting a generated replica of the second carrier signal from the received transmission signal; means for generating, prior to the subtracting performed by the means for subtracting, the replica of the second carrier signal, the means for generating comprising: means for demodulating the decoded transmission signal; means for decoding the received transmission signal; and means for filtering the demodulated and decoded transmission signal for removing the subcarrier signals overlapping the modulated second carrier signal in bandwidth. ### Claim 13 An apparatus comprising: at least one processor; and at least one memory including computer program code, where the at least one memory and the computer program code are configured, with the at least one processor, to cause the apparatus to at least: retrieve a first carrier signal from a received transmission signal comprising a plurality of subcarrier signals of the first carrier signal, each of which subcarrier signals being interfered by an effective interference of a modulated second carrier signal wherein the retrieving is performed by subtracting a generated replica of the second carrier signal from the received transmission signal; prior to the subtracting, generate the replica of the second carrier signal by: demodulating the decoded transmission signal; decoding the received transmission signal; and filtering the demodulated and decoded transmission signal for removing the subcarrier signals overlapping the modulated second carrier signal in bandwidth. ### Claim 14 (depends on 13) The apparatus according to claim 13, wherein the first carrier signal and the second carrier signal are communicated using different access technologies. ### Claim 15 (depends on 13) The apparatus according to claim 13, wherein the first carrier signal and the second carrier signal are transmitted from a single antenna or from multiple different antenna, respectively, for transmitting. ### Claim 16 (depends on 13) The apparatus according to claim 13, wherein the first carrier signal and the second carrier signal are transmitted in a first bandwidth and a second bandwidth, respectively, and the first bandwidth adjoins to or overlaps the second bandwidth. ### Claim 17 (depends on 13) The apparatus according to claim 13 embodied in a base station or a user equipment. ### Claim 18 (depends on 13) The apparatus according to claim 13, wherein the at least one memory including the computer program code is configured with the at least one processor to cause the apparatus to, after the subtracting, transform a signal resulting from the subtracting from a time domain into a frequency domain.