Abstract: Instead of transmitting signals between two individual switching circuits in a communication device via separate paths for the receive and send mode, the signals are transmitted via a common transmission path. Non-overlapping time slots are respectively provided for transmission and reception. The inventive method is particularly suitable for radiotelephone devices, especially for mobile radio telephones.

Abstract: Communications acquisition method for correlating an incoming binary-coded spread sequence having m bits and arriving at a frequency f with a locally generated spread sequence by phase-shifting a multiplicity of locally generated spread sequences with respect to the received spread sequence. The received spread sequence being correlated with a locally generated spread sequence at the frequency f. The received spread sequence is stored. The received, stored spread sequence is split into sections and the correlation is carried out in steps at an oversampling rate. A correlator includes a shift register with feedback. Register positions of the shift register are connected in parallel to a memory input, and the memory output is connected in parallel with the register positions. A further memory holds reference signal sequences and another comparator compares the memory content with further memory content.

Abstract: In a method for controlling radio systems designed for transmission/reception of signals based on at least two radio standards with different time patterns, with signals based on one of these radio standards being processed in each radio system, at least one synchronization signal is produced in the first and/or second radio system for synchronization, respectively, is transmitted to the respective other radio system and system information associated with that particular radio system is in each case stored in that radio system to which the synchronization signal is transmitted. The stored system information can be read by the respective other radio system via an interface, and times for transmission of signals can be calculated by means of the information which has been read. The transmission of signals or the production of events in a radio system can be enabled or inhibited by means of a signal from the other radio systems.

Abstract: In a method for controlling radio systems designed for transmission/reception of signals based on at least two radio standards with different time patterns, with signals based on one of these radio standards being processed in each radio system, at least one synchronization signal is produced in the first and/or second radio system for synchronization, respectively, is transmitted to the respective other radio system and system information associated with that particular radio system is in each case stored in that radio system to which the synchronization signal is transmitted. The stored system information can be read by the respective other radio system via an interface, and times for transmission of signals can be calculated by means of the information which has been read. The transmission of signals or the production of events in a radio system can be enabled or inhibited by means of a signal from the other radio systems.

Abstract: A device for determining an offset value for an offset occurring in a differential transmission signal section of a radio device utilizes, for the purpose of determining the offset value, a signal processing section in a reception part of the radio device. A connecting device is further provided for interchangeably connecting outputs of the differential transmission signal section to inputs of the differential reception signal section.

Abstract: A channel filter (200) with a variable pass bandwidth has a first low-pass filter (200.2) on the input side and is driven by a means (30) for controlling the pass bandwidth as a function of the adjacent channel interference. A first input of the control means (30) is connected to the first low-pass filter (200.2), and a second input is connected to a bandpass filter (200.4) which is connected in parallel with the channel filter (200). The signal path which contains the low-pass filter (200.2) contains a means (37) for removing a DC signal component or DC component.

Abstract: A configuration for time control of a transmitting/receiving device in a mobile station has a system clock generator for producing a standard system clock for different time patterns in different mobile radio standards. The standard system clock is supplied to a programmable clock divider which produces an output clock corresponding to a time pattern that can be selected. An event controller carries out the time control of events on the basis of the output clock and of event information.

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: To correct sudden phase changes, a device for phase correction (20) and a common control unit (10) are described, the latter switching the gain factor for the amplifier stage (30) and, at times coordinated with this, delivering phase correction values of suitable size to the device for phase correction (20), where the control unit (10) uses knowledge about fixed parameters, such as delay times and properties of sudden phase changes, when changing over the amplifier stages.

Abstract: In a method for controlling radio systems designed for transmission/reception of signals based on at least two radio standards with different time patterns, with signals based on one of these radio standards being processed in each radio system, at least one synchronization signal is produced in the first and/or second radio system for synchronization, respectively, is transmitted to the respective other radio system and system information associated with that particular radio system is in each case stored in that radio system to which the synchronization signal is transmitted. The stored system information can be read by the respective other radio system via an interface, and times for transmission of signals can be calculated by means of the information which has been read. The transmission of signals or the production of events in a radio system can be enabled or inhibited by means of a signal from the other radio systems.

Abstract: A method for equalization of a signal is provided, wherein the equalization is of a signal that is transmitted via a data channel based on the DF method. The method takes account of at least one interference channel, and includes processing of at least two trellis diagrams in each time unit, with the states of at least one of the trellis diagrams describing the data channel. A DF contribution that is used for processing of this trellis diagram includes information about at least one interference channel.

Abstract: In a method for equalization of a signal that is transmitted via a user channel using the DF method, an interference channel is taken into account by the DF contribution that is used for processing of the user channel trellis diagram containing information about the interference channel.

Abstract: A transmitting/receiving arrangement has a baseband component and a radio-frequency component that are connected via an interface. The interface has a first differential unidirectional data link for transmission of digital transmission data from the baseband component to the radio-frequency component, and a second differential unidirectional data link for transmission of digital received data, which is converted to baseband in the radio-frequency component from the radio-frequency component to the baseband component.

Abstract: In a method for compensating for a phase error in a reception and/or transmission system having I and Q processing paths, phase corrected I and Q signal components are computed in a computation stage (PC) in a digital signal processing section (10′) of the I and Q signal processing paths.

Abstract: A transmission configuration with a baseband module and a radio-frequency module is particularly suitable for transmission for mobile radio purposes. An interface which is designed on an exclusively digital basis is provided between the baseband module and the radio-frequency module and preferably ensures completely separate transmission of payload data and configuration data. The described principle allows the baseband module to be designed on a completely digital basis, and allows a high degree of flexibility by combination of a single baseband module with two or more different radio-frequency modules.

Abstract: A method for tracking a locally generated spread spectrum signal sequence includes the step of correcting the spread spectrum signal sequences with respect to the synchronization time in an early/late interval. The correlation responses are subtracted from one another and the clock of the locally generated spread spectrum signal sequence is controlled as a function of the subtraction. Correlations are performed through the use of at least two hierarchically staggered closed-loop controls having different early/late intervals. The early interval of the one closed-loop control having a small early/late interval must not become earlier than the early interval of the other closed-loop control system having a next-larger early/late interval. Furthermore, the late intervals of the one closed-loop control system having a small early/late interval must not become later than the late interval of the other closed-loop control system having a next-larger early/late interval.

Abstract: A communications acquisition method includes a correlation of a received, coded spread sequence having a length of m bits with a locally generated spread sequence m times, in each case delayed by one bit, in order to form m correlation responses. Each correlation response is added, with a delay, to a succeeding correlation response to form a correlation result, the delay being an integer multiple of m and of a further bit. Finally, a maximum search is carried out over all m correlation results. A configuration for carrying out the method includes a correlator having an output connected to a first input of an adder and also to a second input of the adder through a delay element.

Abstract: A device for determining an offset value for an offset occurring in a differential transmission signal section of a radio device utilizes, for the purpose of determining the offset value, a signal processing section in a reception part of the radio device. A connecting device is further provided for interchangeably connecting outputs of the differential transmission signal section to inputs of the differential reception signal section.

Abstract: A method is disclosed relating to an arrangement for minimizing the autocorrelation error in the demodulation of a spread-spectrum signal subject to multipath propagation. The received signal is received from a transmitter via a plurality of propagation paths. A demodulator produces a local spread sequence, which is correlated with the received spread sequence in a first control loop on a first phase-angle pair which has a first early-late spacing 2 &Dgr;1, and which is correlated with the received spread sequence in a second control loop on a second phase-angle pair which has a second early-late spacing 2 &Dgr;2. The first and the second control loop emit a first point phase value T1 and a second point phase value T2, respectively, when in the steady state, which phase values express the phase angles of the received spread sequence with respect to the local spread sequence on the first phase angle pair or on the second phase angle pair, respectively.

Abstract: A method and an apparatus for saving current in mobile multi-mode communication terminals, in which the frequency of searching (scanning) for available communication networks is varied as a function of information about the local availability of the communication networks.