Abstract: In a data receiver (6) a detection means (10) is used for determining a symbol value from the received signal. For reducing the effect of cyclostationary noise signals, a number of simultaneously operating detectors (12, 14) are used which derive a sequence of symbols from the input signal sampled at different instants. On the basis of a reliability measure simultaneously derived by the detectors, the symbol sequence whose associated reliability measure expresses the greatest reliability is conveyed to the output of the receiver with the aid of selection means.

Abstract: Viterbi detector for a channel having a memory length 1, where no more than two survivors with an associated difference metric are updated. In the prior-art Viterbi detector of this type the new difference metric is from the previous difference metric by use of a saturation function. If the channel parameters differ from the values assumed for the calculation of the difference metric, the performance of the prior-art detector will rapidly degrade. In the detector according to the invention the new difference metric is derived from a combination of the saturation function of the previous difference metric and a correction signal which is a measure for the channel parameter difference.

Abstract: The device includes a neural network with an input layer 3, an internal layer 4, and an output layer 5. This network is designed to classify data vectors to classes, the synaptic weights in the network being determined through programming on the basis of specimens whose classes are known. Each class is defined during programming as corresponding to a set of neurons of which each represents a domain which contains a fixed number of specimens. The network includes a number of neurons and synaptic weights which have been determined as a function of the classes thus defined.

Abstract: A microcircuit for a multi-application chip card, comprising notably a read-only memory (12), a programmable memory (13), and an addressing control circuit (14) for the programmable memory. The programmable memory (13) is subdivided into at least a repertory region (ZR) and an application region (ZA), the repertory region (ZR) comprising, for each application loaded therein, at least a reference code of an application i present in the region ZA.sub.i as well as the addressed ZA.sub.il and ZA.sub.ih, respectively, of the beginning and the end of the region ZA.sub.i allocated to the relevant application. The microcircuit also comprises apparatus (25 to 50) for inhibiting any command (R, W or E) for the programmable memory (13) when it relates to an address outside the interval ZA.sub.il -ZA.sub.ih of the application being processed, except when it concerns a specific priority operation provided by a program permanently stored in the read-only memory (12).

Abstract: A highly parallel and pipelined computer processor such as a pipelined very long instruction word (VLIW) processor having a plurality of arithmetic and logic units (ALUs) which process computer operations in parallel to speed up the operation of the computer. Operations issued during the branch delay period following conditional jump operations are conditioned on the outcomes of the condition evaluation of such conditional jump operations that have not yet percolated through the instruction issue pipeline, by matching a field in the operation to path information generated by a branch control unit. Operations that succeed are allowed to proceed and the effects of unsuccessful operations are disabled. This allows a form of look-ahead computation after a conditional branch which is particularly attractive for a VLIW processor having a large number of parallel functional units and allows useful work to be done in the branch delay periods.

Abstract: Prior-art radio networks constituted by cordless telephones in which the base stations of cordless telephones are connected to an exchange, comprise a control arrangement connected upstream of the base stations. To considerably reduce the circuitry and cost of a radio network constituted by cordless telephones, there is proposed that the exchange sends out a broadcast call addressed to a multiplicity of subscribers, the broadcast call containing a code assigned to a called cordless telephone and that transmitter means are provided in the base stations which send out a code contained in a broadcast call to the cordless telephones. When the command extension options of exchanges are suitably used, the function of a control arrangement in previous base stations can be integrated in the exchange without additional hardware extensions.

Abstract: In cordless telephone sets comprising at least one base station and at least one handset, an exchange of identification codes takes place between the base station and the handset. In order to realise greater flexibility with cordless telephone sets, the invention proposes to establish a connection between the handset and the base station also by means of a second identification code stored in the base station. In this manner, any user without knowing the identification codes to be exchanged between the handset and the base station can sign on and sign off a handset at any compatible base station, provided that he knows the second identification code.

Abstract: A data communication system based on a serial bus and a monitor station for use with such system.A data communication system is based on a serial bus. It comprises transmitter stations and receiver stations. Frames have a sequence of start signals, address signals, and further signals, and also include control signals, and support an in-frame dialog between master and slave. A monitor station is also present and, irrespective of the source of a particular bit allows for sampling such bit in that it emulates an uncommitted slave station.

Abstract: A smart card security system has a system code and a security code. By means of a unique card containing the system code, the security code can be changed. Any card containing the correct security code renders the apparatus to be protected operable. The holder of the card bearing the system code can temporarily authorize other users to operate the apparatus.

Abstract: For position-sensitive measurements, an X-ray analysis system comprises a one-dimensional position-sensitive detector and a detection Soller slit system in order to achieve position sensitivity in a direction transversely of the dispersion direction of the detector. Different position-sensitive measurement methods can be carried out by adaptation of the Soller slit system and the orientation of the one-dimensional position-sensitive detector.

Abstract: In a system for checking the access to data of a data unit (T10, T20, T30), the data unit is connected to a public network (V2) and is capable of exchanging data with a second subscriber (T4) over this network. In order that an authorized subscriber has access to the data of the data unit even without a secret telephone number, an adapter (T15, T25, T35) is allocated to the data unit (T10, T20, T30), which adapter can be dialled over a secured network (V1). The adapter (T15, T25, T35) is arranged in such a way that, in response to being dialled over the secured network (V1), the adapter causes the data unit (T10, T20, T30) to dial the second subscriber (T4) whose telephone number is stored in a memory (T11, T21, T31) allocated to data unit.

Abstract: Multi-apparatus consumer electronics system provided with multiple channel for control and data signalization including qualifier bus control channel, and initiator apparatus and follower apparatus for use in such system. A consumer electronics system has plural apparatuses interconnected by a multiple channel for control and data signalization including a control channel. The control channel is a qualifier bus that in each apparatus is interfaced to a control element that in an initiator apparatus transmits a message selectively specifying a proprietary signalization interface. A follower apparatus acknowledges the message if the user signalization interfaces match. Thereupon, the system coactivates the matched interfaces in initiator and follower apparatuses. In an extended form, the apparatuses as a prerequisite try to consent about a standard protocol on a further control channel external to said multiple channel.

Abstract: A multistation communication system accommodates one master station and a plurality of slave stations. The bus has a separate clock signal wire, a separate information bit group wire, and a separate indication signal wire. A first value of the indication signal identifies an actual information bit group as an address, a second value identifies them as data. Each address bit group has control bits next to operational address bits. A slave station may recognize one or more addresses as its own address; the associated control bits will then mandate the transfer direction. Furthermore, the slave station may recognize one particular operational address as an interface reset control signal.

Abstract: A method for testing integrated circuits provided on a carrier. The circuits include a series input (22) and a series output (24) for test and result patterns. A mode control register (30) receives a mode control signal train via the serial input. Under the control of said mode control signal train the serial input and output can be shortcircuited to each other, or further registers (32, 34, 36) can be selectively filled and emptied. In this manner, both the interior of the integrated circuit and respective interconnection functions can easily be tested by a universal protocol. Integrated circuits and the carrier only require minor extension/adaptations.

Abstract: A method is described, in which a self-test is controlled in a subsystem of a data processing system. Control patterns are transported by the data processing system via a shift register and are then passed to the subsystem via connections used for normal control in the non-testing condition. A characterization of the test result is then loaded again into the shift register via connections also intended for normal use and is subsequently transported by the data processing system. A subsystem suitable for a self-test according to this method is controllable in the self-test condition from a shift register without it being necessary that it is provided with special test connections.

Abstract: A method of operating a communications system, particularly a FDM-TDD cordless telephony system, in which, in order to expedite handover, a portable secondary station builds up a record of the status and quality of the other FDM channels in the system by every 1 in n (where n is an integer greater than one) TDD frames monitoring another FDM channel. The value of n is adaptive in that, as the quality of its existing channel deteriorates, the value of n decreases, thereby updating its record more rapidly. At handover, the secondary station is able to choose immediately an acceptable alternative channel, thereby avoiding the time overhead of scanning all the other FDM channels.

Abstract: A synchronous transmission system including a circuit arrangement for determining the data bytes of a signal to be received or to be transmitted. The circuit arrangement includes a control circuit (2, 14) which includes at least a counter (11, 19) for marking the pointer bytes of each high bit rate transport unit that can occur and which circuit arrangement includes at least a counter (6, 17) for marking with a count the data bytes of each high bit rate transport unit that can occur. The control circuit (2, 14) further includes for each group of low bit rate transport units that can occur in each maximum bit rate transport unit that can occur at least a position counter (6, 17), which counter is provided for marking with a count the data bytes in a low bit rate transport unit of the group. The control circuit (2, 14) is additionally provided at least for identifying the payload bytes and the pointer bytes on the basis of the counts and the information about the transport units of the signal.

Abstract: In a local communication system a frame forming device is provided which makes it possible to connect signal sources that are designed to have a private connection to a destination device (and therefore produce signals that are unspecific for selection of destination devices), via a shareable bus to the destination device. To determine to which destination device a signal source is connected, the frame forming device contains an address generator. By making functions of the address generator programmable via the bus the system connections are made flexible.

Abstract: In order to enhance the dissipation of heat, a metal structure is provided between an anode target layer and a support for the anode target layer in an X-ray tube. In the case of a target transmission tube, notably the dissipation of heat to the window wall is enhanced, whereas in the case of an anode target layer provided on a suitably thermally conductive anode body, the dissipation of heat to said body is enhanced.

Abstract: The invention relates to an echo canceller (1, 2, 3, 6) including an adaptive filter (3) which can be inserted between a receive path (r) and a send path (s), and including a non-linear filter (2) which can be inserted in the send path (s). The echo canceller is to have an improved echo cancellation, especially when the state of doubletalk occurs, thus substantially avoiding an erroneous activation of the non-linear filter when the state of doubletalk is detected. For this purpose, it is proposed that the echo canceller (1, 2, 3, 6) comprises an up/down counter (11) provided for counting up with a first value (Z.sub.U) when the state of doubletalk (d) occurs and for counting down with a second value (Z.sub.D) smaller than the first value (Z.sub.U) when the states of non-doubletalk (a, b, c) occur, the non-linear filter (2) being provided to be inserted in the send path (s) only when the state of far-end speech (c) occurs and when the up/down counter (11) reaches a predeterminable small value (Z.sub.