Infineon Technologies Ag

Intel Mobile Communications Gmbh

Steffen Paul

Thomas Ruprich

Burkhard Becker

Thuyen Le

Manfred Zimmermann

Bernhard Wicht

Volker Sch&ouml;ber

Louay A Jalloul

Rod G Fleck

Christian Drewes

Herbert R Dawid

Dietmar Wenzel

Yannick Martelloni

Sabeen Randhawa

Lothar Winkler

Matthias Hillebrand

Klaus Oberl&auml;nder

Martin Seifert

Paolo Ienne

Laurent Gaziello

A receiver for receiving a data signal having a channel profile may include an equalizer, to which the data signal is feedable, the equalizer having a plurality of filters and a switching device coupled to the filters, a selection device, which is disposed such that it determines a first number and a second number in dependence on the channel profile, and the switching device is disposed such that it connects a number of linear filters corresponding to the first number to form a first overall filter and connects a number of linear filters corresponding to the second number to form a second overall filter.

Receiver and apparatus for receiving a data signal

In a method for identification of a multiple antenna transmission mode in a radio receiver, at least two antenna-decoupled data streams (s, s) are produced by means of an antenna decoupling unit in the receiver. Respective first variables (p, p) are calculated for both data streams, and are dependent on the phase change between the data in the respective data stream. An evaluation unit uses these first variables as the basis to decide whether a multiple antenna transmission mode is being used in the transmitter.

Method and apparatus for identification of transmission antenna diversity in a receiver

A discrete sampling control signal, which influences the sampling time, from a sampling phase selection element is calibrated by definition of quantization intervals for a sampling time error signal. For this purpose, a received signal is shifted through a series of time shifts &#x3c4;in the signal path upstream of the sampling phase selection element. The sampling time errors eassociated with the respective time shifts &#x3c4;are measured. The quantization steps of the sampling control signal that are suitable for the sampling phase selection element are then determined from the relationship obtained between &#x3c4;and e.

Method and circuit arrangement for calibration of a sampling control signal which influences the sampling time of a received signal from a sampling phase selection element

A method for adapting threshold values in an electronic signal processing device, involving a plurality of different threshold values being calculated and being compared with processing variables calculated in the signal processing device, involves calculation of a common correction value which is valid for the various threshold values. The threshold values are then set on the basis of the common correction value.

Method and apparatus for adapting threshold values in electronic signal processing devices

In a method for synchronization of a mobile radio receiver to a base station, the received signal is sampled using oversampling, by which means sample values are obtained from different sampling phases. The oversampled signal is correlated with a local code, with sample values that are associated with a first sampling phase being processed with a frequency offset with respect to sample values that are associated with a second sampling phase.

Method and apparatus for synchronization of a mobile radio receiver to a base station

In a method for synchronization of a mobile radio receiver to a base station, in which a verification step or a plurality of verification steps is or are also carried out in addition to the synchronization steps and one or more identification step or steps which may be present, at least one of the verification steps is carried out in parallel with a synchronization step and/or with an identification step.

Method and device for synchronizing a mobile radio receiver with a base station involving parallel verification

An apparatus for readjustment of a sampling time in a radio receiver includes a component for determination of any sampling time error in a discrete-value received signal that emits a sampling time error signal. A filter arrangement is provided that includes a multi-rate filter that filters the sampling time error signal. A correction element receives the discrete-value received signal and the filtered sampling time error signal, and emits a discrete-value received signal whose timing has been corrected in accordance with the sampling time error.

Apparatus and method for readjustment of a sampling time in radio receivers

In a method and an apparatus () for transmission diversity mode detection in a mobile radio receiver using a decision function, the decision function which is used for detection of the transmission diversity mode is based on the coherent processing of two successive input signal data tuples {r(k);r(k+1)} and {r(k+2);r(k+3)} and recording of a phase offset between the two tuples.

Methods and apparatuses for detecting the TX diversity mode for mobile radio receivers

In a method for carrying out a plurality of correlation procedures in a mobile radio system, sample values which have been written to a data memory (DS) are read using a predetermined reading rule. Two correlation procedures are carried out on the basis of the sample values which have been read. This reading rule is in this case independent of the correlation procedure to be carried out.

Method and device for carrying out a plurality of correlation procedures in a mobile telephony environment

A method for synchronization of a mobile radio receiver having a time slot structure for a radio signal is disclosed. A data stream received by the mobile radio receiver is filtered in a filter, thereby producing a decision sequence of received data as a set of maximum possible determined time slot boundaries. The decision sequence is processed in a two-step method such that, in a first method step, a subset is selected from the decision sequence and, then, in a second method step, the elements of said subset are averaged over time, with the time slot boundary which is used for synchronization being obtained as the result of this averaging process. In this case, the subset is selected using statistical characteristics of those signal sample values that are associated with a time slot boundary, and of those signal sample values which are not associated with a time slot boundary.

Method and device for synchronizing a mobile radio receiver

In a method for synchronization of a receiver to a transmitter which periodically transmits a sequence which is known in the receiver, a subset of possible synchronization times is determined in a first selection process by repeated correlation of the received signal with the known sequence and comparison of the correlation responses, as calculated for the correlations, with a threshold value. The threshold value is in this case varied adaptively as a function of at least one parameter which is measured during the correlations.

Method and apparatus for synchronization of a receiver to a transmitter

In order to determine the optimal sampling point for a series of spread-coded data, received by a radio, a correlation data series is used that is produced by convoluting the channel impulse response of the transmission channel with the spread data series, known at the receiving end. The channel impulse response is determined using a channel estimator according to a training sequence. An early-late correlator correlates the correlation data series with the received data in order to generate a correction signal for the optimal sampling point.

Apparatus and method for fine synchronization when sampling spread-coded received signals

In the method according to the invention for searching for the carrier frequency f of a mobile radio transmitter in a mobile radio receiver, two or more values e(k) of the spectral input power are measured at different discrete test frequencies f, where f&#x3c;f. The maximum e(k) of the values e(k) and of the associated test frequency fis then searched for. An estimated value f', which is characteristic of the sought carrier frequency f, can be determined from knowledge of the values of at least one value pair e(k) and e(k) where k&#x3c;k&#x3c;k, and of the specific test frequency f.

Method and arrangement for fast frequency searching in broadband mobile radio receivers

A memory device has a read amplifier with either a variable input resistance and/or the input connections that may be linked to one or both poles of a voltage source using one or more transistors. Additionally, or alternatively the read amplifier is also applied in the decoder devices for choosing the memory cell to he read out or to be written to.

Memory device

A data memory including a main data memory having a plurality of data memory units, a redundancy data memory that includes a plurality of redundancy data memory units for the replacement of defective data memory units of the main data memory, and a redundancy control logic for controlling the access to the redundancy data memory, the main data memory and the redundancy data memory being connected to a data bus in parallel with one another via data lines, and the main data memory and the redundancy control logic being connected, in parallel with one another, via address lines, to an address bus for the addressing of data memory units in the data memory.

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Baierbrunn, Germany

Steffen Paul