Abstract: In a method, an apparatus and a system for data transmission, a plurality of transmitters are provided, which operate according to a communications standard for data transmission with a bandwidth that is higher than the transmission bandwidth. The transmitter is adapted to the transmission bandwidth, and the plurality of the adapted transmitters are allocated to different carrier frequencies in the transmission bandwidth for parallel data transmission.

Abstract: A user equipment obtains channel state information for base stations serving the user equipment according to a coordinated multi-point transmission, arranges the channel state information in a predetermined order, and transmits the channel state information in the predetermined order. At least one base station of the base stations receives the channel state information, arranges the channel state information in the predetermined order into a datagram, and transmits the datagram to at least one other base station of the base stations.

Abstract: A method for operating a radio communication system involves the use of OFDM and involves a first sending station modulating a first OFDM symbol onto a first carrier frequency and sending the first OFDM symbol to a first receiving station via a first transmission channel using an air interface. The first sending station changes the first carrier frequency during a time used for sending the first OFDM symbol, the change in the first carrier frequency being made independently of a change in transmission characteristics of the first transmission channel over time. A fast frequency hopping system is disclosed.

Abstract: A method detects a first baseband signal sent by a first sending station via an air interface to a first radio station of a radio communications system. A first receive signal, which contains the first baseband signal superposed with at least a second baseband signal sent by a second sending station to a second radio station, is received by the first radio station. The first radio station uses at least a second receive signal received by the second radio station for detection of the first baseband signal. The second receive signal contains at least the second baseband signal, and is used to at least partially cancel the interference in the first receive signal caused by the second baseband signal.

Abstract: An apparatus for assigning transmission symbols to a media data stream of information symbols is described, the media data stream including a first substream for representing media content in a basic quality and a second substream including additional data for representing the media content, along with the first substream, in an improved quality. The apparatus includes a first assigner for assigning first transmission symbols to the information symbols of the first substream and a second assigner for assigning second transmission symbols to the information symbols of the second substream, the first transmission symbols being transmissible, via a transmission channel, with reduced error probability as compared to the second transmission symbols.

Abstract: A method processes information to be sent via radio, according to which first bits represent a first number of N-tuples and second bits represent a second number of N-tuples. The first bits are to be sent using a first group of sub-bands of a frequency band, and the second bits are to be sent using a second group of sub-bands of the frequency band. A first modulation method is used for the first bits and a second modulation method is used for the second bits. The first bits are rearranged, forming M-tuples, and a symbol is formed from each M-tuple according to the first modulation method. The second bits are rearranged, forming P-tuples, and a symbol is formed from each P-tuple according to the second modulation method, and M?P. A corresponding method is used for processing information received by radio. Base stations and mobile radio stations carry out the method.

Abstract: Method and Apparatus thereof for coordinating a joint transmission between a plurality of cooperative access nodes serving a plurality of user terminals in a mobile communications system, including the steps of: receiving channel information by said access nodes from user terminals that are being served by said access nodes; exchanging between said access nodes of said received channel information thus ensuring that all channel information is distributed to all cooperative access nodes; processing all received channel information by each one of said access nodes, and determining by said access nodes using said processed channel information, of a channel estimation for said joint transmission.

Abstract: An adaptive signal processing method to achieve an increase in capacity of data transfer systems, in which control data is returned via a backward channel. The method provides signal processing using an electrical sub-carrier sub-division according to frequency, the electrical sub-carrier with the lowest carrier frequency being permanently used as the backward channel (RC) for transferring control information relating to the current transfer quality of each sub-carrier. An electrical modulation on N parallel sub-carriers takes place in the transmitter (Tx) and then an optical intensity modulation is carried out for a serial data transfer in the optical channel (IRWC). The discrete division of the information to be transferred to the sub-carriers in a real-time operation can take place by the implementation of specific bit-loading algorithms.

Abstract: It is described a method of operating a base station and a base station which uses a communication channel depending on channel state related information and time information e.g. a prediction time. In this way, problems due to outdating of the channel state related information may be overcome and a feedback overhead may be reduced. According to other embodiments, other parameters like a used prediction method, a prediction horizon, etc. are used to provide a better scenario adaption. Other embodiments relate to combined long term prediction and short term prediction and respective timing settings. Other embodiments relate to a method of operating a user equipment and a user equipment which is adapted for communicating the required time information between the base station and the user equipment.

Abstract: A concept for estimating interfering channels in a multicellular radio communication system including a plurality of base stations and at least one mobile station is suggest, wherein pilot signals are transmitted from the base stations to at least a mobile station, additional pilot sequences are generated, a pattern is provided which defines a rule for distributing the pilot sequences to the base stations, the pilot sequences are modulated and superposed onto said pilot signals, and a pilot signal received at a mobile station is used for estimating interferences in the communication channel from the base station which transmits the pilot signal.

Abstract: In a method and/or an OFDM device for SC-FDMA data transmission, a sequence of input data is transformed by means of a discrete transformation as transformed data signals of coded and modulated data signals on first frequency channels into a first frequency space over a first number of frequencies. The transformed data signals are mapped on second frequency channels in a second frequency space with a larger second number of frequencies. The transformed data signals on the second frequency channels are inverse-transformed using an inverse transformation. Data inversely transformed in such a way are provided for transmission. The transformed data signals are mapped into a frequency range of the second frequency channels in such a way that a constant component of the transformed data signals is mapped centrally within the frequency range.

Abstract: It is described a method of operating a base station and a base station which uses a communication channel depending on channel state related information and time information e.g. a prediction time. In this way, problems due to outdating of the channel state related information may be overcome and a feedback overhead may be reduced. According to other embodiments, other parameters like a used prediction method, a prediction horizon, etc. are used to provide a better scenario adaption. Other embodiments relate to combined long term prediction and short term prediction and respective timing settings. Other embodiments relate to a method of operating a user equipment and a user equipment which is adapted for communicating the required time information between the base station and the user equipment.

Abstract: A user equipment obtains channel state information for base stations serving the user equipment according to a coordinated multi-point transmission, arranges the channel state information in a predetermined order, and transmits the channel state information in the predetermined order. At least one base station of the base stations receives the channel state information, arranges the channel state information in the predetermined order into a datagram, and transmits the datagram to at least one other base station of the base stations.

Abstract: A method and a device for data processing in a communication network are provided, wherein a mobile terminal receives several input signals from at least one base station; and wherein the mobile terminal processes said several input signals into a feedback information that is conveyed to at least one base station.

Abstract: It is described a method for transmitting channel quality information between a second network element and a first network element. The method includes (a) dividing a range of possible radio channel qualities between the two network elements into a fixed number of quality classes, (b) measuring the quality of a radio channel between the two network elements, (c) selecting one quality class out of the fixed number of quality classes based on the measured quality of the radio channel, (d) transmitting from the second network element to the first network element a first channel quality information being indicative for the selected quality class, and (e) transmitting from the second network element to the first network element a second channel quality information being indicative for the measured quality within the limits of the selected quality class. It is further described the first and the second network element, which in conjugation with each other are adapted to carry out the described method.

Abstract: Method and Apparatus thereof for coordinating a joint transmission between a plurality of cooperative access nodes serving a plurality of user terminals in a mobile communications system, including the steps of: receiving channel information by said access nodes from user terminals that are being served by said access nodes; exchanging between said access nodes of said received channel information thus ensuring that all channel information is distributed to all cooperative access nodes; processing all received channel information by each one of said access nodes, and determining by said access nodes using said processed channel information, of a channel estimation for said joint transmission.

Abstract: In a radio communication system, at least a first frequency band is subdivided into C radio resource units which are allocable for radio transmissions between radio stations and terminals. Each radio resource unit has at least two adjacent subcarriers, for allocation of at least a first resource unit for a data transmission between a terminal and a radio station. The radio station receives from the terminal a first short training symbol which has spectrally the same bandwidth as the first frequency band and includes at least Q frequency carriers, where Q is greater or equal to C, but smaller than the total number of subcarriers. The radio station estimates the radio channel for at least the first radio resource unit using the first short training symbol, and an allocation of the first radio resource unit to the terminal is broadcasted by the radio station.

Abstract: An apparatus for assigning transmission symbols to a media data stream of information symbols is described, the media data stream including a first substream for representing a media content in a basic quality and a second substream including additional data for representing the media content, along with the first substream, in an improved quality. The apparatus includes a first means for assigning first transmission symbols to the information symbols of the first substream and a second means for assigning second transmission symbols to the information symbols of the second substream, the first transmission symbols being transmissible, via a transmission channel, with reduced error probability as compared to the second transmission symbols.

Abstract: A concept for estimating interfering channels in a multicellular radio communication system including a plurality of base stations and at least a mobile station is suggest, wherein pilot signals are transmitted from the base stations to at least a mobile station, additional pilot sequences are generated, a pattern is provided which defines a rule for distributing said pilot sequences to the base stations, said pilot sequences are modulated and superposed onto said pilot signals, and a pilot signal received at a mobile station is used for estimating interferences in the communication channel from the base station which transmits said pilot signal.

Abstract: The invention relates to a switchable infrared filter, consisting of a diamond carrier material (1), whereon a filter material (6), which is made of a thermochromic material, is disposed on one side and which can be connected to a heating device (2, 3).