Abstract: A device for placing power control data in a transmission signal has: a generating device for generating power control data as a function of a received signal, a buffer for buffering a formatted transmission data word that contains a power control data field for recording power control data, an inserting device for inserting the generated power control data into the power control data field of the buffered transmission data word, and a modulation device for modulating the transmission data word to form a transmission signal with a transmission power corresponding to the power control data.

Abstract: A method and a device for generating a rate compatible code are described. In the method, a serial-concatenated code at a code rate that can be predetermined is generated. A message signal is partially coded by a first coding stage. A second coding stage is provided on the output side of the first coding stage. The code rate of the coded message signal can be set in a manner which can be predetermined by a controllable puncturer which is disposed in the signal path between the first coding stage and the second coding stage.

Abstract: A method and device for decoding a sequence of physical signals. A Viterbi algorithm is carried out a first time for all physical signals, resulting in a maximum likelihood path, wherein there is one signal value for each physical signal and which has been determined along the entire trellis according to the Viterbi algorithm. A reliability value is determined for each signal value of the maximum likelihood path.

Abstract: A device for spectrally shaping a discrete-value transmission signal, in a radio transmitter, includes one input for receiving an in phase component of the transmission signal and a further input for receiving a quadrature component of the transmission signal. The device also includes a filter circuit with a plurality of multipliers. A multiplexing unit is located in the signal path before the filter circuit, and a demultiplexing unit is located in the signal path after the filter circuit.

Abstract: In a method for deinterleaving a data signal interleaved in blocks in accordance with a prescribed interleaving specification, deinterleaving target addresses are calculated for a first prescribed segment of the data symbols to be deinterleaved, and are stored in a target address memory. The relevant segment of the data symbols is then deinterleaved by using the calculated target addresses. Subsequently, these two steps are repeated until the entire data block has been segmentally deinterleaved.

Abstract: A method for equalizing and decoding an error-protected data signal transmitted via a radio channel is described. According to the method, an equalized data signal is calculated at the receiving end in a demodulator with a first channel estimator. The equalized data signal is decoded by a decoder to determine a decoded output signal. The equalized data signal is transmitted to a second channel estimator, which repeatedly detects second channel parameters of the radio channel. The parameters are transmitted to the decoder which uses them as calculation parameters during decoding.

Abstract: A turbo decoder is used in a method for blockwise decoding a data signal that is error protection coded at a transmitter and that is detected in a receiver. The turbo decoder includes two feedback symbol estimators. In order to calculate its output values, at least one of the symbol estimators executes, with reference to a data block being considered, a plurality of forward and/or backward recursions over subintervals of the data block.

Abstract: A turbo decoder for decoding a data signal transmitted via a disturbed channel has a symbol estimator and a digital signal processor. The symbol estimator performs two symbol estimations, and the DSP performs an interleaving and deinterleaving procedure, within a computing loop of the iterative turbo decoding. A bidirectional interface is provided for transferring data between the symbol estimator and the DSP.

Abstract: Mobile radio receivers in a mobile radio system are synchronized. A first synchronization channel is provided, which has a first frequency and via which a code which is known to all the mobile radio receivers and to all the base stations of the mobile radio system is transmitted with a signal. The transmission from a base station to a mobile radio receiver delays the signal by an unknown time period and the first frequency is displaced by the transmission to a second frequency. The method includes a correlation and sampling of the received signal, digital filtering of the correlated and sampled signal, squaring of the filtered signal, determination of the maximum signal level of the squared signal, estimation of the unknown time period with the maximum signal level, despreading of the received signal with the known code, taking into account the just-estimated time period, and fine-tuning of the second frequency to the first frequency.

Abstract: In a method for producing a channel-coded and subscriber-coded message signal, a coding device receives a message signal represented by a sequence of data symbols. The message signal is channel-coded using a channel code and is subscriber-coded using a specific subscriber code selected from a number of available subscriber codes. The specific subscriber code is selected from the subscriber codes available in a memory ME taking account of the error protection level of the channel-coded and subscriber-coded message signal to be transmitted, that is, such that an overall code formed from the channel code and the selected, specific subscriber code has a maximum Hamming distance.

Abstract: A device for the bidirectional transfer of data between two processors contains input and output control information memories for storing an item of binary control information for input and output memories. The memories can be accessed by the second processor and, via a DMA channel, by the first processor. The access operations of both processors to these memories are coordinated on the basis of the content of the input and output control information memories.

Abstract: A method for estimating channel parameters of radio channels of a W-CDMA mobile radio system, for example in accordance with the UMTS standard includes transmitting sequences of known symbols between unknown data symbols by a base station. The channel estimation is carried out by a comparison of the received sequences with the known symbols, and the result of the comparison is integrated over a sequence of known symbols.

Abstract: An apparatus for finely synchronizing code signals with an encoded received signal includes a sampling device for sampling the received signal at regular sampling intervals, a pulse shaper for shaping the sampled received signal pulses in order to output a first and second pulse-shaped sample in dependence on an autocorrelation function, a buffer for buffering the two samples, a code signal generator for generating the code signal, correlation devices for correlating the generated code with the two buffered samples to form two correlation values, and an interpolation device for forming an interpolation value as a function of the two pulse-shaped samples and the deviation between the two correlation values.

Abstract: CDMA Receiver. According to one embodiment, a CDMA receiver is provided for receiving a CDMA signal in a multi-subscriber environment. The multi-subscriber environment can include a receiving device for receiving the CDMA signal. Further, the environment can include a Rake receiving circuit for detection of signal components of the CDMA signal which are transmitted via the various signal paths. The environment can also include a channel estimation circuit for estimating channel coefficients of a transmission channel coefficient h of a transmission channel H by means of a predetermined reference data sequence contained in the received CDMA signal. A weighting coefficient calculation device can calculate weighting coefficients for the various signal components of the CDMA signal. Further, the environment can include a weighting circuit for weighting the signal components with the calculaed weighting coefficients. A combiner can combine the weighted signal components to form an estimated received data signal.

Abstract: A method for synchronizing a mobile radio receiver with a frame structure of a radio signal received from a specific base station assumes that each base station transmits a predefined, individual sequence of frame synchronization codes for each frame. The synchronization codes are detected and decoded in the mobile radio receiver and a characteristic code parameter is allocated to them. The sequence transmitted by the specific base station is identified on the basis of the code parameters and the start and end times of the sequence are defined. The mobile radio receiver is frame-synchronized with these times.

Abstract: To achieve an improved disparate error protection in the transmission of coded symbols of an information stream, the information stream is supplied to a multiplicity of coding branches for coding, and is supplied in parallel, to a puncturing and multiplexing unit. Symbols of different quality classes are fed into each coding branch using a demultiplexer. An interleaver follows at least one demultiplexer for generating error protection for the filtered symbols. The symbols, which may possibly be interleaved, are coded in each coding branch and are supplied to the puncturing and multiplexing unit. The puncturing and multiplexing unit sets a predetermined coding rate.

Abstract: A turbo decoder for decoding a data signal transmitted via a disturbed channel has a symbol estimator. The symbol estimator contains a computing device, which, with knowledge of the error protection code used at the transmitter end, calculates transition metric values, forward and reverse recursion metric values and the output values (LLR). The computing device includes at least one hardware computing chip constructed of combinatorial logic for generating at least one type of the values.

Abstract: The method and device enable determining the carrier frequency of base stations in the mobile receiver of a cellular mobile radio system working with W-CDMA. The carrier frequency of the primary synchronization channel of the strongest received base station is first searched for by carrying out a non-coherent correlation of the received signal with the primary synchronization code over a very large number of code elements of the signal.

Abstract: A transceiver configuration has an integrated circuit (IC) with an A/D and/or D/A converter, a VCO with a reference oscillator, which provides a sampling clock for the A/D and/or D/A converter, and a digital data processing circuit. The IC is connected to a radio-frequency section, the frequency converter stage of which is operated with a beat frequency derived from the controllable oscillator frequency foz. A capacitive resonant element of the reference oscillator is disposed outside of the IC.

Abstract: An initial data stream is coded using a first set of n coders to form n coded data streams, which are subsequently punctured by combining the n coded data streams with a first puncturing data field to form a first punctured data stream. The initial data stream is also interleaved using k interleaving circuits to produce k interleaved data streams, which are subsequently coded using a set of m coders to form m coded interleaved data streams. In addition, a second puncturing data field is interleaved to form an interleaved puncturing data field. The m coded interleaved data streams are subsequently punctured by combining the m coded interleaved data streams with the interleaved puncturing data field to form a second punctured data stream. The initial data stream, the first punctured data stream and the second punctured data stream are multiplexed to form a transmission data stream.