Infineon Technologies Ag

Siemens Aktiengesellschaft

Markus Doetsch

Peter Jung

Peter Schmidt

Michael Schneider

Tideya Kella

Jörg Plechinger

J&ouml;rg Plechinger

Joerg Plechinger

Burkhard Becker

Friedbert Berens

Patrick Feyfant

Alfredo Ruscitto

S&ouml;nke Mehrgardt

Sven Simon

Jorg Plechinger

A programmable synchronizing unit for a signal receiver has a received data memory for buffering received data, a correlation value data memory for storing correlation values, a data path for correlating the received data with the correlation values, a result data memory for buffering the received data correlated with the correlation values by means of the data path, and a control unit for addressing the received data memory, the result data memory and the correlation value data memory () and for controlling the data path as a function of a synchronization program which is stored in a program memory.

Programmable synchronization unit for a signal receiver

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 f. A capacitive resonant element of the reference oscillator is disposed outside of the IC.

Frequency-stabilized transceiver configuration

A device for processing a digital data signal in a CDMA radio transmitter includes a channelization device, a spectral shaping device and a frequency correction device. The channelization device adds a channel-individual CDMA code to the digital data signal, the spectral shaping device subjects the digital, channel-individualized data signal to a spectral shaping and the frequency correction device performs a spectral shift of the digital, spectrally shaped data signal.

Device and method for processing a digital data signal in a CDMA radio transmitter

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.

Apparatus and method for placing power control data in a transmission signal

A data processing device in a mobile radio telephone receiver contains a RAKE receiver portion with RAKE fingers and a path search and evaluation device for detecting paths of the air interface which must be allocated to the individual RAKE fingers and for estimating one or more parameters with respect to each detected path. A finger selection and power consumption reduction device performs a clock rate reduction or disconnects individual RAKE fingers in consideration of the path parameters.

Mobile radio telephone receiver

A transmit signal is generated with N antenna data signals for emission via N transmitting antennas. A useful data signal X is subjected to channel coding to generated the transmit signal. On the signal path between channel coding and the emission via the transmitting antennas, data rate matching is performed by way of a data rate matching stage which makes it possible that the number N of the transmitting antennas can be predetermined independently of the code rate.

Method and device for diversity transmission of coded information

A receiver circuit for a communications terminal includes a signal pre-processing circuit having: an analog/digital converter device with K analog/digital converters connected in parallel, a conversion device, and a filter device connected downstream of the conversion device. The filter device has N digital filters connected in parallel, where N is an integer that is greater than or equal to 1 and is less than K.

Receiver circuit for a communications terminal and method for processing signals in a receiver circuit

Apparatus for placing power control data in a transmission signal

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.

Method and device for generating a rate compatible code

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. The Viterbi algorithm is then carried out a second time with the following steps: selecting one subregion of the trellis, the subregion having a partial initial signal value and a partial end signal value on the maximum likelihood path; determining one further path in that subregion of the trellis which ends at the partial end signal value of the maximum likelihood path; determining each signal value on the further path and comparing same with the corresponding signal value on the maximum likelihood path relating to the same time; depending on the comparison result, the signal value of the maximum likelihood path is allocated the reliability value determined in the previous iteration step or the minimum of this and the reliability value of the partial end signal value; shifting the subregion of the trellis by at least one time unit; and using, storing and/or outputting the determined signal values and selected reliability values associated with the signal values as the decoded sequence.

Method and device for decoding a sequence of physical signals, reliability detection unit and viterbi decoding unit

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.

Method for segmentally deinterleaving a data signal

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.

Method and device for equalizing and decoding a data signal

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.

Turbo decoder and turbo decoding method

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.

Method and device for generating a channel-coded and subscriber-coded message signal

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.

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Schliern, Switzerland

Markus Doetsch