# US 8,274,878 B2 · Frame and training pattern structure for multi-carrier systems > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 8,274,878 B2 - Document ID: US8274878B2 - Status: Granted - Kind: B2 - Application number: 12/437,161 - Filed: 2009-05-07 - Published: 2009-12-10 - Granted: 2012-09-25 - Earliest claimed: 2008-06-04 - Assignees: Sony Corporation - Inventors: Lothar Stadelmeier; Dietmar Schill; Samuel Asangbeng Atungsiri; Antonio Alarcon Gonzalez - Web page: https://patentgrep.com/patent/US8274878B2 ## CPC - H04L 27/2602: {Signal structure} - H04L 5/005: {of common pilots, i.e. pilots destined for multiple users or terminals} - H04L 5/0092: {Indication of how the channel is divided} - H04L 25/0226: {sounding signals per se} - H04L 27/2613: {Structure of the reference signals} - H04L 27/2626: {Arrangements specific to the transmitter only} - H04L 27/2666: {Acquisition of further OFDM parameters, e.g. bandwidth, subcarrier spacing, or guard interval length} - H04N 21/426: Internal components of the client {; Characteristics thereof} (H04N5/44 takes precedence) - H04N 21/4385: Multiplex stream processing, e.g. multiplex stream decrypting - H04L 5/0007: {the frequencies being orthogonal, e.g. OFDM(A) or DMT} - H04L 5/0044: {Allocation of payload; Allocation of data channels, e.g. PDSCH or PUSCH} - H04L 27/26132: {using repetition} - H04L 27/2647: {Arrangements specific to the receiver only (equalisation H04L27/01)} - H04N 21/2383: Channel coding {or modulation} of digital bit-stream, e.g. QPSK modulation (arrangements for detecting or preventing errors in the information received by adapting the channel coding H04L1/0009; analogue front ends or means for connecting modulators, demodulators or transceivers to a transmission line H04L27/0002) - H04N 21/4345: {Extraction or processing of SI, e.g. extracting service information from an MPEG stream} - H04N 21/4383: {Accessing a communication channel} - H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M) - H04N: PICTORIAL COMMUNICATION, e.g. TELEVISION ## Abstract A transmitting apparatus for transmitting signals in a multi carrier system on the basis of a frame structure, each frame comprising at least two preamble patterns adjacent to each other in the frequency direction and at least two data patterns, said transmitting apparatus comprising a pilot mapper configured to map the same sequence of pilot signals on frequency carriers of each of said at least two preamble patterns in a frame, each preamble pattern having the same length, a data mapper configured to map data on frequency carriers of said at least two data patterns in a frame, a transformer configured to transform said preamble patterns and said data patterns from the frequency domain into the time domain in order to generate a time domain transmission signal, and a transmitter configured to transmit said transmission signal. ## Claims ### Claim 1 A transmitting apparatus for transmitting signals in a multi carrier system on the basis of a frame structure, said transmitting apparatus comprising: a frame former configured to form frames of said frame structure, each frame comprising at least two preamble patterns adjacent to each other in the frequency direction and at least two data patterns following the at least two preamble patterns in the time direction in a time slot succeeding the time slot in which the at least two preamble patterns are located, wherein each of the at least two data patterns in a frame is respectively followed by further data patterns in succeeding time slots in the time direction, wherein all data patterns following each other in the time direction have a same frequency direction structure, each of the at least two preamble patterns, the at least two data patterns, and the further data patterns comprising a plurality of frequency carriers, wherein a length of each of the at least two preamble patterns is equal to or smaller than the effective receiving bandwidth of a receiving apparatus adapted for receiving said signals, a pilot mapper configured to map the same sequence of pilot signals on frequency carriers of each of said at least two preamble patterns in a frame, each preamble pattern having a same length, a data mapper configured to map data on frequency carriers of said at least two data patterns and said further data patterns in a frame, transformer configured to transform said preamble patterns and said data patterns from the frequency domain into the time domain in order to generate a time domain transmission signal, and a transmitter configured to transmit said time domain transmission signal. ### Claim 2 (depends on 1) The transmitting apparatus according to claim 1, wherein the length of at least some of the at least two data patterns is different from each other, and the length of each of the data patterns is smaller than or equal to the length of each of the preamble patterns. ### Claim 3 (depends on 1) The transmitting apparatus according to claim 1, wherein the length of all the data patterns is the same and smaller than or equal to the length of each of the preamble patterns. ### Claim 4 (depends on 1) The transmitting apparatus according to claim 1, wherein the length of the data patterns is adjusted dynamically. ### Claim 5 (depends on 1) The transmitting apparatus according to claim 1, wherein each frame comprises at least two signaling patterns, said transmitting apparatus comprising a signaling data mapper configured to map the same signaling data on frequency carriers of each signaling pattern in a frame. ### Claim 6 (depends on 5) The transmitting apparatus according to claim 5, wherein the length of each signaling pattern is the same as the length of said preamble patterns. ### Claim 7 (depends on 5) The transmitting apparatus according to claim 5, wherein the length of each signaling pattern is smaller than the length of each of said preamble patterns. ### Claim 8 (depends on 7) The transmitting apparatus according to claim 7, wherein the length of each signaling pattern is half the length of each of said preamble patterns. ### Claim 9 (depends on 5) The transmitting apparatus according to claim 5, wherein the signaling data mapper is configured to map the signaling data on frequency carriers of each signaling pattern with an error correction coding. ### Claim 10 A transmitting method for transmitting signals in a multi carrier system on the basis of a frame structure, the method comprising: forming frames of said frame structure, each frame comprising at least two preamble patterns adjacent to each other in the frequency direction and at least two data patterns following the at least two preamble patterns in the time direction in a time slot succeeding the time slot in which the at least two preamble patterns are located, wherein each of the at least two data patterns in a frame is respectively followed by further data patterns in succeeding time slots in the time direction, wherein all data patterns following each other in the time direction have a same frequency direction structure, each of the at least two preamble patterns, the at least two data patterns, and the further data patterns comprising a plurality of frequency carriers, wherein a length of each of the at least two preamble patterns is equal to or smaller than the effective receiving bandwidth of a receiving apparatus adapted for receiving said signals, mapping a same sequence of pilot signals on frequency carriers of each of said at least two preamble patterns in a frame, each preamble pattern having a same length, mapping data on frequency carriers of said at least two data patterns and said further data patterns in a frame, transforming said preamble patterns and said data patterns from the frequency domain into the time domain in order to generate a time domain transmission signal, and transmitting said time domain transmission signal. ### Claim 11 A receiving apparatus for receiving signals in a multi carrier system on the basis of a frame structure in a transmission bandwidth, each frame comprising at least two preamble patterns adjacent to each other in the frequency direction, each with a same sequence of pilot signals mapped on frequency carriers and at least two data patterns following the at least two preamble patterns in the time direction in a time slot succeeding the time slot in which the at least two preamble patterns are located, wherein each of the at least two data patterns in a frame is respectively followed by further data patterns in succeeding time slots in the time direction, wherein all data patterns following each other in the time direction have a same frequency direction structure, said at least two data patterns and said further data patterns having data mapped on frequency carriers, each of said at least two preamble patterns having a same length, each of the at least two preamble patterns, the at least two data patterns, and the further data patterns comprising a plurality of frequency carriers, said receiving apparatus comprising: a receiver configured to be tuned to and to receive a selected part of said transmission bandwidth, said selected part of said transmission bandwidth having at least a length of one of said preamble patterns and covering at least one data pattern to be received, and a correlator configured to perform a correlation on the basis of the pilot signals received in said selected part of said transmission bandwidth. ### Claim 12 (depends on 11) The receiving apparatus according to claim 11, wherein said correlator is configured to perform an auto-correlation on the basis of the pilot signals received in said selected part of said transmission bandwidth. ### Claim 13 (depends on 11) The receiving apparatus according to claim 11, wherein said correlator is configured to perform a cross-correlation on the basis of a comparison between a stored version of a preamble pattern and a received version of the preamble pattern received in said selected part of said transmission bandwidth. ### Claim 14 (depends on 13) The receiving apparatus according to claim 13, further comprising a pilot rearranger configured to rearrange said received pilot signals into the original sequence in case that the selected part of said transmission bandwidth to which the receiver is tuned does not match with the preamble pattern structure. ### Claim 15 (depends on 11) The receiving apparatus according to claim 11, wherein each frame comprises at least two signaling patterns, each signaling pattern comprising a same signaling data mapped onto frequency carriers, said receiving apparatus comprising a reconstructor configured to reconstruct the original signaling pattern from said received selected part of said transmission bandwidth. ### Claim 16 (depends on 15) The receiving apparatus according to claim 15, wherein said reconstructor is configured to rearrange said received signaling signals into the original signaling pattern in case that the selected part of said transmission bandwidth to which the receiving means is tuned does not match with the signaling pattern structure. ### Claim 17 (depends on 15) The receiving apparatus according to claim 15, wherein said reconstructor is configured to perform an error correction decoding on said received signaling signals in order to reconstruct the original signaling pattern. ### Claim 18 (depends on 15) The receiving apparatus according to claim 15, wherein said receiver is configured to be tuned to and to receive a selected part of said transmission bandwidth so that an optimized receipt of a signaling pattern in the selected part of said transmission bandwidth to be received is enabled. ### Claim 19 (depends on 11) The receiving apparatus according to claim 11, wherein said receiver is configured to be tuned to and to receive a selected part of said transmission bandwidth so that said at least one data pattern to be received is centered in relation to the selected part of said transmission bandwidth to be received. ### Claim 20 (depends on 11) The receiving apparatus according to claim 11, wherein said receiver is configured to be tuned to and to receive a selected part of said transmission bandwidth on the basis of signaling information received in a signaling pattern of a previous frame. ### Claim 21 A receiving method for receiving signals transmitted in a multi carrier system on the basis of a frame structure in a transmission bandwidth, each frame comprising at least two preamble patterns adjacent to each other in the frequency direction, each with a same sequence of pilot signals mapped on frequency carriers and at least two data patterns following the at least two preamble patterns in the time direction in a time slot succeeding the time slot in which the at least two preamble patterns are located, wherein each of the at least two data patterns in a frame is respectively followed by further data patterns in succeeding time slots in the time direction, wherein all data patterns following each other in the time direction have the same frequency direction structure, said at least two data patterns and said further data patterns having data mapped on frequency carriers, each of said at least two preamble patterns having a same length, each of the at least two preamble patterns, the at least two data patterns, and the further data patterns comprising a plurality of frequency carriers, the method comprising: receiving a selected part of said transmission bandwidth, said selected part of said transmission bandwidth having at least a length of one of said preamble patterns and covering at least one data pattern to be received, and performing a correlation on the basis of the pilot signals received in said selected part of said transmission bandwidth. ### Claim 22 (depends on 1) A system for transmitting and receiving signals, comprising a transmitting apparatus according to claim 1, and a receiving apparatus comprising: a receiver configured to be tuned to and to receive a selected part of said transmission bandwidth, said selected part of said transmission bandwidth having at least a length of one of said preamble patterns and covering at least one data pattern to be received, and a correlator configured to perform a correlation on the basis of the pilot signals received in said selected part of said transmission bandwidth. ### Claim 23 (depends on 21) A method for transmitting and receiving signals, comprising a transmitting method for transmitting signals in a multi carrier system on the basis of a frame structure, said transmitting method comprising: forming frames of said frame structure, each frame comprising at least two preamble patterns adjacent to each other in the frequency direction and at least two data patterns following the at least two preamble patterns in the time direction in a time slot succeeding the time slot in which the at least two preamble patterns are located, wherein each of the at least two data patterns in a frame is respectively followed by further data patterns in succeeding time slots in the time direction, wherein all data patterns following each other in the time direction have a same frequency direction structure, each of the at least two preamble patterns, the at least two data patterns, and the further data patterns comprising a plurality of frequency carriers, wherein a length of each of the at least two preamble patterns is equal to or smaller than the effective receiving bandwidth of a receiving apparatus configured to receive said signals, mapping a same sequence of pilot signals on frequency carriers of each of said at least two preamble patterns in a frame, each preamble pattern having a same length, mapping data on frequency carriers of said at least two data patterns and said further data patterns in a frame, transforming said preamble patterns and said data patterns from the frequency domain into the time domain in order to generate a time domain transmission signal, and transmitting said transmission signal, said method further comprising the receiving method according to claim 21.