Patent application number | Description | Published |
20080227497 | TRANSMITTING DEVICE AND METHOD FOR TRANSMITTING SIGNALS IN A WIRELESS COMMUNICATION SYSTEM, RECEIVING DEVICE AND METHOD FOR RECEIVING SIGNALS IN A WIRELESS COMMUNICATION SYSTEM - A transmitting device for transmitting signals in a wireless communication system, includes at least two beam antennas, each beam antenna having a main beaming direction at a different angle and generating means for generating a number of signal streams to be transmitted within the wireless communication system, whereby the signal to be transmitted is split into these different streams and said number of signal streams corresponds to the number of beam antennas, whereby each signal stream is transmitted via a different beam antenna. Transmitting device for transmitting signals in a wireless communication system, comprising at least two beam antennas, each beam antenna having a main beaming direction at a different angle and generating means for generating a number of signal streams to be transmitted within the wireless communication system, whereby each of these signal streams comprises a different version of the data, and said number of signal streams corresponds to the number of beam antennas, whereby each signal stream is transmitted via a different beam antenna. | 09-18-2008 |
20080240307 | SINGLE CARRIER HIGH RATE WIRELESS SYSTEM - The present invention relates to a signal generator and signal processor for single carrier wireless communication systems with frequency domain equalizer, which are operable to use pseudorandom-noise sequences for cyclic prefix. The different arrangements and examples of said pseudorandom-noise sequences could be used for coarse timing synchronization, channel estimation, carrier synchronization, signal-noise-ration estimation and channel equalization. | 10-02-2008 |
20090022174 | CONTENTION BASED MEDIA ACCESS MECHANISM - The present invention relates to the field of contention in a network of communicating nodes. The present invention especially relates to a master node for a communication network, to a slave node device for a communication network, to a network comprising the master node device and at least one slave node device and to a method of contention in a network of nodes. The method of contention according to the present invention is method in a network comprising slave nodes, said slave nodes comprising a group of first slave nodes, the method comprising the step of sending, by every first slave node participating in a contention, a number of two or more contention participation messages during a contention window associated with the first slave node. | 01-22-2009 |
20090041141 | PILOT PATTERN DESIGN FOR AN OFDM SYSTEM - The present invention relates to a transmitting device and a receiving device in a wireless orthogonal frequency division multiplex (OFDM) communication system with space time transmit diversity (STTD). Further, the present invention relates to a channel estimation method for performing a channel estimation in such a wireless communication system, in which the transmitting device comprises a first and a second antenna for transmitting signals with space time transmit diversity. The first and the second antenna means are arranged spaced apart from each other in a space diversity arrangement, whereby first and second pilot symbols are transmitted via said first and said second antenna means, respectively. Some of the second pilot symbols are orthogonal to corresponding ones of the first pilot symbols, so that a channel estimation to separately determine the transmission quality of signals transmitted from the first and the second antenna means, respectively, can be performed in a receiving device which receives the signals with only one single antenna. | 02-12-2009 |
20090041142 | PILOT PATTERN DESIGN FOR AN OFDM SYSTEM - A transmitting device for transmitting data symbols and pilot symbols in an OFDM transmission system; the device comprising symbol generating means for generating said data symbols and said pilot symbols, means for transmitting said data symbols and pilot symbols respectively by using a plurality of subcarriers of said OFDM transmission system, wherein said symbol generating means is designed to selectively generate a first type pilot symbol and a second type pilot symbol being orthogonal to said first type pilot symbol so that a pilot symbol pattern in the frequency dimension comprises at least said first type pilot symbol to be transmitted by using a predefined subcarrier and second type pilot symbol to be transmitted by using other predefined subcarrier, and wherein said pilot symbol pattern has a different pattern from a succeeding pilot symbol pattern in time dimension. | 02-12-2009 |
20090080561 | PILOT PATTERN DESIGN FOR A STTD SCHEME IN AN OFDM SYSTEM - A transmitting device for transmitting data and pilot symbols in an OFDM transmission system having transmission antennas. The device includes symbol generating means for generating data and pilot symbols, means for transmitting the data and pilot symbols using subcarriers of the OFDM system. The symbol generating means generates a first and second type pilot symbol, the second having an inverted value of the first so that a first pilot symbol pattern to be transmitted by using one of said plurality of transmission antennas has a different pattern in the frequency and time dimension from a second pilot symbol pattern to be transmitted by using another transmission antenna. First and second pilot symbols are comprised in respective first and second pilot symbol patterns, where at least some of the first and second pilot symbols have the same time allocation and being alternately identical and inverted to each other. | 03-26-2009 |
20090153400 | METHOD AND DEVICE FOR TRANSMITTING SIGNALS IN A WIRELESS COMMUNICATION SYSTEM, RECEIVING DEVICE FOR RECEIVING SIGNALS IN A WIRELESS COMMUNICATION SYSTEM, WITH A SPECIAL FRAME STRUCTURE - The present invention relates to a method for transmitting signals in a wireless communication system, in which signals are transmitted from a first communication device to a second communication device, said signals being transmitted in consecutive frames, each frame having a preamble section including preamble information, at least one of said first and said second communication devices having a narrow beam antenna which is adapted to be steered to different positions, each of said different positions corresponding to one of a number of different transmissions paths from said to said second communication device, including the steps of transmitting and receiving a first preamble section including preamble information enabling the estimation of a channel quality of a current transmission path, while said narrow beam antenna is in a current position corresponding to said current transmission path, steering said narrow beam antenna from said current position to a different position corresponding to a candidate transmission path, and transmitting and receiving a second preamble section including preamble information enabling the estimation of a channel quality of said candidate transmission path while said narrow beam antenna is in said different position. The present invention further relates to a corresponding transmission device as well as a receiving device. | 06-18-2009 |
20090156130 | BEAM STEERING ALGORITHM FOR NLOS WIRELESS SYSTEMS WITH PREDEFINED PARAMETERS - The present invention relates to the fields of link adaption, multi-path communication, non-line of sight wireless communication. The present invention especially relates to a communication system, a communication device and a communication method. The problem to be solved by the present invention is to reduce the time which is necessary for the adaption to a specific communication path in a communication system. The method of communication between a first communication device and a second communication device based on a plurality of communication paths comprises a step of transmitting (S | 06-18-2009 |
20090219981 | MINIMUM MEAN SQUARE ERROR EQUALISER WITH REDUCED COMPLEXITY - The present invention relates to the field of communication devices, e.g. wireless communication devices. More particularly, the present invention relates to the field of signal equalisation, especially minimum mean square error equalisation. The present invention especially relates to an equaliser for a communication device, a method of equalising one or more received signals and a software program product for carrying out the method. The present invention reduces the size of a look-up table needed for a division operation and, generally, provides for a reduced complexity of the equaliser and receiver. The equaliser for a communication device comprises a filter calculator for determining a channel power value based on one or more channel response values and selecting one of two or more equaliser structures based on said channel power value and based on at least one threshold value for separating the channel power values into at least two ranges; and a filter for equalising one or more received signals according to the selected equaliser structure. Advantageously, at least one of said equaliser structures corresponds to an, at least approximated, minimum mean square error equaliser structure or to an, at least approximated, suboptimal minimum mean square error equaliser structure. | 09-03-2009 |
20090225741 | WIRELESS SYSTEM USING A NEW TYPE OF PREAMBLE FOR A BURST FRAME - The present invention relates to a signal generator and signal processor for single carrier wireless communication systems with frequency domain equalizer, which are operable to use pseudorandom-noise sequences as part of a preamble and possibly as cyclic prefix. The different arrangements and examples of said pseudorandom-noise sequences could be used for coarse timing synchronization, channel estimation, carrier synchronization, signal-noise-ratio estimation and channel equalization. | 09-10-2009 |
20090231194 | TRANSMITTING DEVICE, RECEIVING DEVICE AND METHOD FOR ESTABLISHING A WIRELESS COMMUNICATION LINK - The present invention comprises a method for establishing a wireless communication link between a first communication device ( | 09-17-2009 |
20090231221 | DIELECTRIC ROD ANTENNA AND METHOD FOR OPERATING THE ANTENNA - A rod antenna and a method for operating the rod antenna. The rod antenna includes a two-dimensional patch for radiating and/or receiving an electromagnetic wave, the patch extending along a plane defined by two coordinate axes orthogonal to each other. A feeding line is coupled to the patch for transferring signal energy to and/or from the patch, and a dielectric rod radiates and/or receives the electromagnetic wave, the rod extending longitudinally from the patch in direction of a third coordinate axis outside of the plane defined by the first two coordinate axes. A metal holder is coupled to the patch and to the rod for transferring the electromagnetic wave between the patch and the rod. | 09-17-2009 |
20090257487 | VIDEO ROBUSTNESS USING SPATIAL AND TEMPORAL DIVERSITY - The present invention relates to the fields of wireless communication, video transmission, unequal error protection, time diversity, space diversity. The present invention especially relates to a transmitter, a receiver, a method of transmitting video data and a method for receiving video data. The transmitter for transmitting video data comprises: A transmission section, said transmission section comprising a parser for dividing said video data into at least two classes and dividing each class into one or more blocks. Hereby, with each class there is associated a different number. Said transmission section is adapted to transmit at least one block of each class once on each communication channel of a set communication channels, the number of communication channels comprised in the respective set being given by the number associated with the respective class. Further, different communication channels correspond to different transmission times and/or different transmit paths. The receiver for receiving video data comprises: A receiving section for receiving said video data on a plurality of communication channels and generating a plurality of partial signals, each partial signal corresponding to a different communication channel. Different communication channels correspond to different transmission times and/or different receive paths. A decoding and validating section comprising a decoder for decoding a first block of said video data based on a partial signal of a first number of at least two partial signals and an error detector for determining if said decoded first block of video data is corrupted. In case said decoded first block of video data is determined to be corrupted, said decoder is configured to decode said first block of video data based on an other signal of said first number of partial signals. | 10-15-2009 |
20100113099 | COMMUNICATION SYSTEM AND METHOD - A communication system including a first station having at least two first narrow beam antennas and a second station having at least two second narrow beam antennas. The first and second stations establish a first communication path for wireless communication via a pair of first and second narrow beam antennas. When communication via the first communication path is disturbed by obstacles, the first and second stations automatically establish at least one alternative communication path, which is spatially different from the first communication path, for wireless communication using the at least two first narrow beam antennas and the at least two second narrow beam antennas. | 05-06-2010 |
20100226453 | PILOT PATTERN DESIGN FOR A STTD SCHEME IN AN OFDM SYSTEM - A transmitting device for transmitting data symbols and pilot symbols in an OFDM transmission system; the device comprising symbol generating means for generating said data symbols and said pilot symbols, means for transmitting said data symbols and pilot symbols respectively by using a plurality of subcarriers of said OFDM transmission system, wherein said symbol generating means is designed to selectively generate a first type pilot symbol and a second type pilot symbol being orthogonal to said first type pilot symbol so that a pilot symbol pattern in the frequency dimension comprises at least said first type pilot symbol to be transmitted by using a predefined subcarrier and second type pilot symbol to be transmitted by using other predefined subcarrier, and wherein said pilot symbol pattern has a different pattern from a succeeding pilot symbol pattern in time dimension. | 09-09-2010 |
20110076955 | TRANSMITTING DEVICE, RECEIVING DEVICE AND METHOD FOR ESTABLISHING A WIRELESS COMMUNICATION LINK - A method for establishing a wireless communication link between a first communication device having a beam antenna to be steered to different positions and a second communication device. The method includes transmitting a link request signal from the first communication device to the second communication device via the beam antenna. The link request signal includes information relating to a current position of the beam antenna. The method further includes obtaining, in case the link request signal is received in the second communication device, channel quality information representative of a current transmission path. | 03-31-2011 |
20110182378 | PILOT PATTERN DESIGN FOR A STTD SCHEME IN AN OFDM SYSTEM - A transmitting device for transmitting data and pilot symbols in an OFDM transmission system having transmission antennas. The device includes symbol generating means for generating data and pilot symbols, means for transmitting the data and pilot symbols using subcarriers of the OFDM system. The symbol generating means generates a first and second type pilot symbol, the second having an inverted value of the first so that a first pilot symbol pattern to be transmitted by using one of said plurality of transmission antennas has a different pattern in the frequency and time dimension from a second pilot symbol pattern to be transmitted by using another transmission antenna. First and second pilot symbols are comprised in respective first and second pilot symbol patterns, where at least some of the first and second pilot symbols have the same time allocation and being alternately identical and inverted to each other. | 07-28-2011 |
20110188602 | PILOT PATTERN DESIGN FOR A STTD SCHEME IN AN OFDM SYSTEM - A transmitting device for transmitting data and pilot symbols in an OFDM transmission system having transmission antennas. The device includes symbol generating means for generating data said pilot symbols, means for transmitting the data and pilot symbols using subcarriers of the OFDM system. The symbol generating means generates a first and second type pilot symbol, the second having an inverted value of the first so that a first pilot symbol pattern to be transmitted by using one of said plurality of transmission antennas has a different pattern in the frequency and time dimension from a second pilot symbol pattern to be transmitted by using another transmission antenna. First and second pilot symbols are comprised in respective first and second pilot symbol patterns, where at least some of the first and second pilot symbols have the same time allocation and being alternately identical and inverted to each other. | 08-04-2011 |
20110211622 | WIRELESS COMMUNICATION METHOD AND SYSTEM - A method providing wireless communication between a first station and a second station. The method establishes at least one communication path between at least one pair of antennas including a first antenna of the first station and a second antenna of the second station, wherein at least one of the first and second antennas is a narrow beam antenna, selects at least one part of the bandwidth available on the communication path, and transmits data between the pair of antennas over the selected part of the bandwidth. | 09-01-2011 |
20120008709 | SINGLE CARRIER HIGH RATE WIRELESS SYSTEM - A signal generator and signal processor for single carrier wireless communication systems with frequency domain equalizer operable to use pseudorandom-noise sequences for cyclic prefix, the pseudorandom-noise sequences for coarse timing synchronization, channel estimation, carrier synchronization, signal-noise-ration estimation and channel equalization. | 01-12-2012 |
20120045996 | COMMUNICATION SYSTEM AND METHOD - A communication system including a first station having at least two first narrow beam antennas and a second station having at least two second narrow beam antennas. The first and second stations establish a first communication path for wireless communication via a pair of first and second narrow beam antennas. When communication via the first communication path is disturbed by obstacles, the first and second stations automatically establish at least one alternative communication path, which is spatially different from the first communication path, for wireless communication using the at least two first narrow beam antennas and the at least two second narrow beam antennas. | 02-23-2012 |
20130084814 | COMMUNICATION SYSTEM AND METHOD - A communication system including a first station having at least two first narrow beam antennas and a second station having at least two second narrow beam antennas. The first and second stations establish a first communication path for wireless communication via a pair of first and second narrow beam antennas. When communication via the first communication path is disturbed by obstacles, the first and second stations automatically establish at least one alternative communication path, which is spatially different from the first communication path, for wireless communication using the at least two first narrow beam antennas and the at least two second narrow beam antennas. | 04-04-2013 |
20130084815 | TRANSMITTING DEVICE AND METHOD FOR TRANSMITTING SIGNALS IN A WIRELESS COMMUNICATION SYSTEM, RECEIVING DEVICE AND METHOD FOR RECEIVING SIGNALS IN A WIRELESS COMMUNICATION SYSTEM - A transmitting device for transmitting signals carrying data in a wireless communication system, including at least two beam antennas, each beam antenna having a main beaming direction at a different angle; a generator configured to generate a number of signal streams to be transmitted over a wireless communication channel within the wireless communication system, wherein each of the signal streams includes a different version of the data and the number of signal streams corresponds to the number of the at least two beam antennas, wherein each signal stream is transmitted over the wireless communication channel via a different beam antenna of the at least two beam antennas; and a cyclic delay diversity unit configured to cyclically shift each different version of data and to use cyclic delay diversity. | 04-04-2013 |
20130208824 | PILOT PATTERN DESIGN FOR A STTD SCHEME IN AN OFDM SYSTEM - A transmitting device for transmitting data symbols and pilot symbols in an OFDM transmission system; the device comprising symbol generating means for generating said data symbols and said pilot symbols, means for transmitting said data symbols and pilot symbols respectively by using a plurality of subcarriers of said OFDM transmission system, wherein said symbol generating means is designed to selectively generate a first type pilot symbol and a second type pilot symbol being orthogonal to said first type pilot symbol so that a pilot symbol pattern in the frequency dimension comprises at least said first type pilot symbol to be transmitted by using a predefined subcarrier and second type pilot symbol to be transmitted by using other predefined subcarrier, and wherein said pilot symbol pattern has a different pattern from a succeeding pilot symbol pattern in time dimension. | 08-15-2013 |