Abstract: An iterative method and a device for decoding received signals transmitted in data frames via various channels. In order to be able to utilize the computing capacity of digital signal processors (DSPs) as efficiently as possible, it is proposed that, starting at a first channel, the quality of the decoded signal transmitted via the first channel is checked following every iteration and switchover takes place to at least one further channel if a specifiable switchover condition exists. The switchover condition may, for example, be a specifiable quality of the decoded signal transmitted via the channel under consideration. To determine the quality of the decoded signal a cyclic redundancy check (CRC), in particular, is proposed following every iteration.

Abstract: An aspect of the invention relates to a digital generator for multi-carrier frequency division multiplexing (FDM) signals. The digital generator comprises an electronic circuit being operated under the control of a computer program. The digital generator is configured to generate FDM signals being comprised of FDM symbols, wherein at least one FDM symbol has pilot symbols which are non-equidistantly spaced in frequency. Another aspect of the invention relates to a digital receiver for multi-carrier FDM signals. The digital receiver comprises an electronic circuit being operated under the control of a computer program, and further comprises a demodulator for demodulating digital multi-carrier FDM signals, said signals being comprised of FDM symbols having pilot symbols, the pilot symbols of at least one FDM symbol being non-equidistantly spaced in frequency.

Abstract: Embodiments of the invention relate to a method of generating digital multi-carrier frequency division multiplexing (FDM) signals, the signals comprising FDM symbols having pilot symbols, wherein at least one FDM symbol has pilot symbols which are non-equidistantly spaced in frequency. Other embodiments of the invention relate to a method of processing multi-carrier frequency division multiplexing (FDM) signals, the method comprising the following steps: a) demodulating digital multi-carrier FDM signals, said signals being comprised of FDM symbols having pilot symbols, the pilot symbols of at least one FDM symbol being non-equidistantly spaced in frequency, b) replacing, on a sub-carrier basis, at least one data symbol with a pilot symbol, whereby the replacement yields a spacing of pilot symbols which is equidistant in frequency for all FDM symbols.

Abstract: An iterative method and a device (20) for decoding received signals (21) transmitted in data frames via various channels (A, B). In order to be able to utilize the computing capacity of digital signal processors (DSPs) as efficiently as possible, it is proposed that, starting at a first channel (A; B), the quality of the decoded signal (33) transmitted via the first channel (A; B) is checked following every iteration (A1, . . . , A5; B1, . . . , B3) and switchover takes place to at least one further channel (B; A) if a specifiable switchover condition exists. The switchover condition may, for example, be a specifiable quality of the decoded signal (33) transmitted via the channel under consideration. To determine the quality of the decoded signal (33) a cyclic redundancy check (CRC), in particular, is proposed following every iteration (A1, . . . , A5; B1, . . . , B3).

Abstract: An iterative method and a device for decoding received signals transmitted in data frames via various channels. In order to be able to utilize the computing capacity of digital signal processors (DSPs) as efficiently as possible, it is proposed that, starting at a first channel, the quality of the decoded signal transmitted via the first channel is checked following every iteration and switchover takes place to at least one further channel if a specifiable switchover condition exists. The switchover condition may, for example, be a specifiable quality of the decoded signal transmitted via the channel under consideration. To determine the quality of the decoded signal a cyclic redundancy check (CRC), in particular, is proposed following every iteration.

Abstract: A method for estimating the signal to noise ratio (=SNR) of a modulated communication signal including a data symbol component and a noise component is characterized in that an intermediate SNR value of the modulated communication signal is derived from a data assisted maximum-likelihood estimation, the assisting data not being known in advance but being reconstructed from samples of the modulated communication signal, and that an estimated SNR value is determined by a controlled non-linear conversion of the intermediate SNR value. This method allows an SNR estimation with high accuracy even for low numbers of processed samples.

Abstract: A portable device suitable for communicating with a communications network over a main wireless transmitter/receiver module comprises a main antenna. The module communicates with the portable device via an interface, wherein said portable device further comprises at least one secondary wireless transmitter/receiver module comprising a diversity antenna and communicating with said main transmitter/receiver module via a direct data link external to said portable device. Thus, flexibility, exchangeability and upgradeability of the portable device are increased.

Abstract: A method for allocating subcarrier frequencies to a user terminal in a wireless system using multi-carrier modulation such as OFDM in which a network is adapted to communicate with a plurality of user terminals for data transmission, signaling control and link adaptation via an air interface downlink channel and feedback channel, and where a number of terminals estimate their own specific channel transfer function, wherein upon terminal channel transfer function estimation over a certain period of time, a set of terminals report to the network, over their feedback channel, information about their measured channel transfer function and interference noise estimate and the network, according to this information, allocates the subcarrier frequencies of at least one first frequency subset to the set of terminals which sent said information following a frequency-selective allocation scheme and allocates the subcarrier frequencies of at least one second frequency subset to the rest of the terminals according to a fr

Abstract: The present invention relates to an uplink macro diversity method in a digital cellular mobile radio communication system, the method comprising the steps of: transmitting an information block from a mobile station (114), the information block having a number of data bits, receiving a first information block corresponding to the information block at the first base station (104) and receiving a second information block corresponding to the information block at at least a second base station (106), determining a first quality measure for each data bit of the first information block by the first base station (104), the first quality measure representing the reliability of the data bit, determining a second quality measure for each data bit of the second information block by the second base station (106), the second quality measure representing the reliability of the data bit, sending of the first information block and the first quality measures from the first base station (104) to a controller and sending

Abstract: The present invention relates to a data processing method of transforming an input data set having a number of data bits to an output data set having the same number of data bits by means of a data processing module, the data processing module being adapted to transform a first data set containing the number of data bits to a second data set containing the number of data bits in one data processing iteration, the data processing method comprising the steps of entering the input data set as a first data set into the data processing module; performing a data processing iteration by means of the data processing module to provide the second data set; and outputting the second data set as the output data set if the first and second data sets of the same data processing iteration are identical, and otherwise entering the second data set as a first data set for a consecutive data processing iteration.

Abstract: In a method for improving the interface efficiency between two network nodes (2, 3, 4) in a communications network (1) the data blocks to be transmitted over the interface are checked for corruption or likely corruption prior to transmission and only uncorrupted or likely uncorrupted data blocks are incorporated in the data frame and transmitted over the interface.

Abstract: The invention relates to an iterative method and a device (20) for decoding received signals (21) transmitted in data frames via various channels (A, B). In order to be able to utilize the computing capacity of digital signal processors (DSPs) as efficiently as possible, it is proposed that, starting at a first channel (A; B), the quality of the decoded signal (33) transmitted via the first channel (A; B) is checked following every iteration (A1, . . . , A5; B1, . . . , B3) and switchover takes place to at least one further channel (B; A) if a specifiable switchover condition exists. The switchover condition may, for example, be a specifiable quality of the decoded signal (33) transmitted via the channel under consideration. To determine the quality of the decoded signal (33) a cyclic redundancy check (CRC), in particular, is proposed following every iteration (A1, . . . , A5; B1, . . . , B3).

Abstract: A method of creating an finite impulse response (FIR) filter adapted to the channel impulse response of a time-dispersive transmission channel includes the steps of providing several FIR sub-filters in parallel, selecting the tap locations of each sub-filter, determining the sub-filter tap coefficients in such a manner that the output impulse responses of the sub-filters are partially or entirely orthogonal with respect to each other, and creating an FIR filter by weighting the combination of parallel sub-filters to create a FIR filter.