Abstract: A final state in a shift register arrangement is obtained from an initial state by means of N-fold iteration using an iteration rule prescribed by a characteristic polynomial f(x) of n-th order. To determine the final state, a tap mask which is characteristic of N? shift register operations is calculated. Using the tap mask, n shift register operations are performed. This produces the n bits of an N?-fold iterated state of the shift register arrangement. Any remaining N-N? iterations which are needed are performed in another manner.

Abstract: A mobile communication system is provided with a system for frequency correction in a reception apparatus which has a first control system, device or loop for detecting a frequency discrepancy in received signals and for appropriate correction of the frequency supplied to a mixer stage, and a second control system, device or loop for detecting a frequency discrepancy in received signals and for subsequent computerized correction thereof on the basis of the CORDIC algorithm.

Abstract: A comparator unit is used to compare an actual transmission time signal with a nominal transmission time signal and to produce a difference signal from the discrepancy, from which difference signal a correction signal is produced in a control unit. This correction signal is used to control a correction unit, which compresses or extends an applied input data signal, thus changing the phase angle of the output data signal so as to minimize the discrepancy between the transmission times. The discrepancy is corrected independently of the system clock, and the correction speed is set variably.

Abstract: An interchangeable lens (1) with a locking device (2, 2?) for system cameras is described, wherein an orientation marking (4) for mounting the locking device (2, 2?) on the camera is provided at the end of the lens housing (3) facing the camera, and the contact surface (6) of the locking device (2, 2?) has a latching depression (8) at a distance from the orientation marking (4) counter to the direction (7) of rotation of the locking operation and the contact surface (6) contains at least two, preferably six, surface areas (10) which are situated next to one another in an isolated fashion at a distance from the latching depression (8) counter to the direction (7) of rotation within an angle segment of from 100° to 160°, preferably 110° to 150°, and can be detected individually by optical means.

Abstract: A comparator unit is used to compare an actual transmission time signal with a nominal transmission time signal and to produce a difference signal from the discrepancy, from which difference signal a correction signal is produced in a control unit. This correction signal is used to control a correction unit, which compresses or extends an applied input data signal, thus changing the phase angle of the output data signal so as to minimize the discrepancy between the transmission times. The discrepancy is corrected independently of the system clock, and the correction speed is set variably.

Abstract: The invention relates to an apparatus for preprocessing of pilot symbols for channel estimation. The pilot symbols are transmitted from a base station and are received by a mobile radio, and are available in the mobile radio. The apparatus includes a low-pass filter apparatus for filtering the received pilot symbols, with a setting of the low-pass filter apparatus depending on the relative speed of the mobile radio with respect to the base station.

Abstract: The invention relates to a transmitting and receiving arrangement for radios having a baseband component and a radio-frequency component that are connected via an interface for interchanging payload data. The interface includes a bidirectional data link that can be operated in a half-duplex mode for transmission of digital payload data to be transmitted from the baseband component to the radio-frequency component and for transmission of received digital payload data from the radio-frequency component to the baseband component.

Abstract: To support a plurality of different mobile radio standards in mobile radio terminal devices using a single system oscillator, a sampling rate converter converts the sampling rates from an input rate to an output rate and additionally outputs control information which is suitable for operating signal processing components. The components receiving the control information are arranged in the signal flow upstream of the sampling rate converter, on average exactly at a virtual sampling frequency. The virtual sampling pattern is mapped onto the frame of the physical operating clock by simply gating out edges of the physical operating clock. Using the control signal, a clock control device generates a masked clock that has, on average, an edge repetition rate which corresponds to the virtual sampling frequency of the samples or to an integer multiple thereof.

Abstract: A mobile station is disclosed for processing differing radio standards such as GSM/GPRS/EDGE and TD-SCDMA. The mobile station includes a channel decoding unit and a coding unit. The signals of both radio standards are processed both with the coding unit and with the channel decoding unit. The coding unit and the channel decoding unit are arranged in the baseband chip of the mobile station. The TD-SCDMA-specific algorithms can be generated by means of a coprocessor that is electrically connected to the baseband chip or integrated in the baseband chip.

Abstract: The present invention is directed to an apparatus for production of scrambling codes that are used for scrambling binary signals transmitted via physical channels in a mobile radio system. The apparatus is also configured to produce preambles that are sent on a physical channel in order to control the access to that particular physical channel. The apparatus includes a scrambling code generator for production of the scrambling codes, and a preamble generator for production of non-scrambled preambles, and at least one multiplier for scrambling the non-scrambled preambles using associated scrambling codes.

Abstract: The present invention provides a method for prediction of a channel coefficient for a propagation path in a mobile radio channel with multipath propagation, in which a canonical random variable analysis is used for prediction of the channel coefficient. The method is preferably used in an estimator for channel coefficients in a base station or in a mobile station in a mobile radio system.

Abstract: A final state in a shift register arrangement is obtained from an initial state by means of N-fold iteration using an iteration rule prescribed by a characteristic polynomial f(x) of n-th order. To determine the final state, a tap mask which is characteristic of N? shift register operations is calculated. Using the tap mask, n shift register operations are performed. This produces the n bits of an N?-fold iterated state of the shift register arrangement. Any remaining N-N? iterations which are needed are performed in another manner.

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: A mobile communication system is provided with a system for frequency correction in a reception apparatus which has a first control system, device or loop for detecting a frequency discrepancy in received signals and for appropriate correction of the frequency supplied to a mixer stage, and a second control system, device or loop for detecting a frequency discrepancy in received signals and for subsequent computerized correction thereof on the basis of the CORDIC algorithm.

Abstract: A hardware apparatus (10) for conditioning pilot symbols for channel estimation in a mobile radio comprises a time-division multiplexed low-pass filter unit for filtering the received pilot symbols. The time-division multiplexed low-pass filter unit comprises, between its input and its output, a feedback path which can be switched in and which can be used to implement a plurality of filter stages in a time-division multiplexed arrangement.

Abstract: A sequence of unfiltered channel estimation values xk is determined in a method for calculation of filtered channel estimation values dk in radio systems. A specific set of filter coefficients is selected from two or more filter coefficient sets, with the filter coefficients being calculated on the basis of the MMSE optimality criterion for a predetermined recursive digital filter (F). The sequence of unfiltered channel estimation values is then filtered by means of this recursive digital filter (F) using the selected filter coefficients.

Abstract: The method makes it possible to determine, by calculation, a state, which has n bits and is iterated N times, of a shift register arrangement from a given initial state. This allows pseudo-noise sequences with any desired offset N to be produced, without prior iterations having to be carried out for this purpose. A matrix whose j-th row, where j=1, . . . , n, is given by the coefficients of that representative of the remaining class [xN+j−1]mod f* whose degree is less than n is used for calculation of the n state, which is iterated N times.

Abstract: A device for exposure metering in photographic cameras including a reflector located in the imaging beam path. The surface of the reflector is provided with a reflecting structure whose size corresponds at least approximately to that of the image recording format. At least one photoelectric receiver records the light intensity of a portion of the image reflected from the reflecting structure. The reflector is pivotally mounted in the camera housing such that during exposure metering the reflector surface is in the vicinity of the film plane of the camera. A limited portion of the reflector is transparent and a photoelectric receiver is set into the backside of the reflector behind the transparent portion.