Abstract: A multiplication or division operation X·K or X·1/K is performed in an electronic circuit. A software circuit area of the circuit calculates a digit shift sv such that psv is an approximate value for K. In a hardware circuit area, the value X is shifted sv digits to the left in the case of multiplication or sv digits to the right in the case of division. The software circuit area calculates a suitable correction factor Kf. The value X is multiplied by the correction factor Kf.

Abstract: The invention relates to a device for calculating FSM bits by means of which the signals sent from two antennas of a base station are influenced with reference to their phase difference and/or their amplitudes. The FSM bits are calculated with the aid of two estimated channel impulse responses. The device is present in hard-wired form.

Abstract: Apparatus for demodulation of a signal which is frequency-modulated with a data symbol sequence {dk}, having a zero crossing detector (1), a generator (2) for production of a sequence {zi}, with zi being calculated from zero crossings ti and ti+1, and having a unit (3) for reconstruction of the data symbol sequence {dk}, which is characterized by a minimum Euclidean distance between the sequence {zi} and an auxiliary sequence, with each sequence element in the auxiliary sequence being formed from convolution of the data symbol sequence {dk} with a sequence {hi,k} relating to the index k, and with the sequences {hi,k} being functions of the times ti and ti+1.

Abstract: A method for calculating zero-crossing reference sequences ({ti}) for the data detection of a sequence of zero crossings ({{circumflex over (t)}i}) of a received signal is disclosed. The data detection is determined in a receiver, wherein the received signal is based on a data symbol sequence ({dk}) angle-modulated at a transmitter and transmitted to the receiver. The zero-crossing reference sequences ({ti}) are calculated in accordance with an equation specifying an output of a finite state machine that describes, at least approximately, the signal generation in the transmitter.

Abstract: In the method, the received spread-coded signal sequence rk(i) is first of all correlated with the spread-coded training symbol sequence in a correlator (24) so as to counteract the influence of the transmitted training symbols. The signal sequence which results from the correlation process is then despread in a despreading apparatus (21, 22). The despread signal sequence is integrated over a number (N_MF) of signal values, with the number (N_MF) being set as a function of the channel dynamic range (?). The sequence of data symbols produced in this way is filtered with fixed or variable filter coefficients in a digital filter (25) in order to produce channel estimation values ({tilde over (H)}(l)).

Abstract: In a method for efficient evaluation of measurement values from a bit error rate measurement for indication of channel quality, the characteristic of the transmission channel, and the bit error rate which is dependent on it, are taken into account via their stochastic distribution. This results in the bit error rate being quantized in a form matched to the channel transmission, for indication of the channel quality. Furthermore, the evaluation can be extended by taking account of a weighting function which allows assessment of application-specific requirements.

Abstract: A method for calculating zero-crossing reference sequences ({ti}) for the data detection of a sequence of zero crossings ({{circumflex over (t)}i}) of a received signal is disclosed. The data detection is determined in a receiver, wherein the received signal is based on a data symbol sequence ({dk}) angle-modulated at a transmitter and transmitted to the receiver. The zero-crossing reference sequences ({ti}) are calculated in accordance with an equation specifying an output of a finite state machine that describes, at least approximately, the signal generation in the transmitter.

Abstract: In a method for generating a reduced-noise signal sequence {{circumflex over (t)}i} from a noisy signal sequence {uj} comprising values uj which are characteristic of the temporal position of crossings of a noisy angle-modulated signal through a threshold value, a decision is made (102) as to whether a value {circumflex over (t)}i of the reduced-noise signal sequence is to be generated for the value uj. If this is the case, the value {circumflex over (t)}i is calculated taking into account earlier values uj of the noisy signal sequence for which no values of the reduced-noise signal sequence {{circumflex over (t)}i} were generated.

Abstract: The invention relates to a device for calculating FSM bits by means of which the signals sent from two antennas of a base station are influenced with reference to their phase difference and/or their amplitudes. The FSM bits are calculated with the aid of two estimated channel impulse responses. The device is present in hard-wired form.

Abstract: A multiplication or division operation X·K or X·1/K is performed in an electronic circuit. A software circuit area of the circuit calculates a digit shift sv such that psv is an approximate value for K. In a hardware circuit area, the value X is shifted sv digits to the left in the case of multiplication or sv digits to the right in the case of division. The software circuit area calculates a suitable correction factor Kf. The value X is multiplied by the correction factor Kf.

Abstract: A detector for zero crossings determines the zero crossings in the received signal or in an intermediate frequency signal which is generated from the received signal. Since, in the case of frequency-modulated signals, the number of zero crossings per symbol interval is naturally not constant, the zero crossing sequence is mapped to a sequence {zi} of parameter values zi which are at equidistant time intervals by means of mathematical, non-linear mapping. Mean value formation of zero crossing intervals or determination of the number of zero crossings can be used for mapping. The sequence of parameter values zi at equidistant time intervals can be supplied to a conventional detection algorithm such as a Viterbi detection algorithm.

Abstract: Apparatus for demodulation of a signal which is frequency-modulated with a data symbol sequence {dk}, having a zero crossing detector (1), a generator (2) for production of a sequence {zi}, with zi being calculated from zero crossings ti and ti+1, and having a unit (3) for reconstruction of the data symbol sequence {dk}, which is characterized by a minimum Euclidean distance between the sequence {zi} and an auxiliary sequence, with each sequence element in the auxiliary sequence being formed from convolution of the data symbol sequence {dk} with a sequence {hi,k} relating to the index k, and with the sequences {hi,k} being functions of the times ti.

Abstract: The possible number of zero crossings in the interval [kTb,(k+1)Tb] is determined for each time (k+1)Tb based on hypothetical subsequences, on the basis of a model for frequency modulation, and a trellis diagram is constructed, based on the model. In a first selection step, those paths in the trellis diagram are then excluded whose number of zero crossings in the stated interval does not match the number of detected zero crossings in the received subsequence in this interval. In a second selection step, the path metrics of the paths which still exist are extended by the new branch metrics based on the Viterbi algorithm which is known per se. If two paths meet one another at a node point then only that path which has the lower path metric is continued.

Abstract: In the method, the received spread-coded signal sequence rk(i) is first of all correlated with the spread-coded training symbol sequence in a correlator (24) so as to counteract the influence of the transmitted training symbols. The signal sequence which results from the correlation process is then despread in a despreading apparatus (21, 22). The despread signal sequence is integrated over a number (N_MF) of signal values, with the number (N_MF) being set as a function of the channel dynamic range (?). The sequence of data symbols produced in this way is filtered with fixed or variable filter coefficients in a digital filter (25) in order to produce channel estimation values ({tilde over (H)}(l)).

Abstract: A method for calculation of path weights for the equalization of a data signal, that is transmitted via a data channel whose power is regulated, in a RAKE receiver is disclosed. In the method, a path weight is calculated for the data signal that is transmitted via the data channel whose power is regulated and a correction factor is calculated for the path weight. The correction factor includes a ratio of the data-channel-specific gain to the pilot-channel-based gain, and the selection of the common pilot symbols that are used for this purpose depending on the receiver velocity or the time slot format.

Abstract: In a method for variable weighting of channel coefficients for a RAKE receiver, at least one variable that is characteristic of a transmitter and/or transmission channel and/or receiver characteristic is assessed. A correction factor is determined, which is dependent on the assessment result. The channel coefficients are multiplied by the correction factor, and the corrected channel coefficients are used as the basis for equalization in the RAKE receiver.

Abstract: A method for calculation of path weights for the equalization of a data signal that is transmitted via a data channel whose power is regulated in a RAKE receiver is disclosed. In the method, at least one uncorrected path weight is calculated for the data signal that is transmitted via the data channel, using channel estimation results that have been obtained on the basis of a common pilot channel. The uncorrected path weight is corrected by multiplying it by a correction factor that contains a ratio of a data-channel-specific gain estimation to a pilot-channel-based gain estimation.

Abstract: In a method for efficient evaluation of measurement values from a bit error rate measurement for indication of channel quality, the characteristic of the transmission channel, and the bit error rate which is dependent on it, are taken into account via their stochastic distribution. This results in the bit error rate being quantized in a form matched to the channel transmission, for indication of the channel quality. Furthermore, the evaluation can be extended by taking account of a weighting function which allows assessment of application-specific requirements.