Abstract: A method and a system for the detection and/or removal of sinusoidal interference signals in/from a noise signal transforms a measured signal (x(t), x(?·?t)) composed of a limited number of sinusoidal interference signals (Ak·ej(?kt+?k), Ak·ej(?·?k?t+?k)) and a white noise signal (w(t), w(?·?t) into a subspace containing its white noise components and a subspace containing its interference signal components. Following this, the individual sinusoidal interference signals (Ak·ej(?kt+?k), Ak·ej(?·?k?t+?k)) are determined using an estimation method within the subspace containing the noise components. The entire frequency range is split into several frequency bands (v), in which the measured signal (x(t), x(?·?t)) consists of a limited number (p(v)) of sinusoidal interference signals (Ak·ej(?kt+?k), Ak·ej(?·?k?t+?k)) and a white noise signal (w(t), w(?·?t)).

Abstract: A method for estimating quality of images compressed with a transformation based compression method. The estimation method uses estimated errors generated by quantization to obtain an image quality indicator and does not require use of a reference image. The estimation method includes calculating a probability of at least one specific quantized transformation coefficient value for at least all coefficients representing one identical two-dimensional frequency, and estimating identifying parameters of at least one probability density function of non-quantized coefficient values from the quantized coefficient value probabilities, with a type of probability density function being preset. The estimation method further includes calculating an image quality indicator from errors introduced by quantization, which are derived from probability density function parameters and quantization parameters.

Abstract: A method and a system for determining the amplitude and/or the phase of the output signal of a transmission link dependent upon the amplitude of the input signal (AM-AM and/or AM-PM characteristic) impresses a test signal (s(t)) on the transmission link (14), measures the response signal (e(t)) resulting from the test signal (s(t)) by amplitude and/or phase distortion in the transmission link (14) and determines the amplitude response (|e(t)|) of the response signal (e(t)) and/or the phase responses (?s(t), ?E(t)) of the test signal (s(t)) and of the response signal (e(t)) dependent upon the amplitude response (|s(t)|) of the test signal (s(t)). The amplitude response (|s(t)|) of the test signal (s(t)) consists of several first and second response segments with constant amplitude values over the duration (?T) of the respective first or second response segment.

Abstract: The invention relates to an analysis device and a method of determining and displaying powers of code channels of a CDMA signal, the powers of the individual code channels being determined and shown on an output device. The powers of the individual code channels are determined respectively for an in-phase arm (I) and a quadrature phase arm (Q) and the powers of the code channels of the in-phase arm (I) and/or the powers of the code channels of the quadrature phase arm (Q) are shown. In the representation of the powers of the code channels of the in-phase arm (I), those code channels, which are inactive in the in-phase arm (I) but active in the quadrature phase arm (Q), are shown distinguishably from the remaining code channels. In the representation of the powers of the code channels of the quadrature phase arm (Q), those code channels, which are inactive in the quadrature phase arm (Q) but active in the in-phase arm (I), are shown distinguishably from the remaining code channels.

Abstract: A method for operating a measuring device, in particular, a vectorial network analyzer, which can be connected via at least two ports to a device under test, with excitation units assigned to each port, wherein each excitation unit provides a signal generator, with which the assigned port can be supplied with an excitation signal, provides the following procedural stages: a measurement at measuring positions of the actual phase offset between the excitation signals output at the ports; and a variation of the frequency of at least one of the two signal generators during a correction interval so that a specified set phase offset is achieved at reference positions between the excitation signals output at the ports.

Abstract: An analog-to-digital converter comprising a positive input terminal, a negative input terminal, several difference detection means detecting a voltage difference between a positive input port and a negative input port, first resistors connecting each positive input port of each difference detection means with the positive input terminal and second resistors connecting each negative input port of each difference detection means with the negative input terminal. First current sources are connected to the positive input port of at least some of the difference detection means. Second current sources are connected to the negative input port of at least some of the difference detection means also generating different currents.

Abstract: A bus system for the real-time communication of a superordinate unit with one or more subordinate units is used for exchanging address and data information via a bus. For the rapid exchange of messages, further fields are provided between the fields for the address and data information.

Abstract: A digital signal-processing device is described which comprises a recording controller for control of recording in the memories drives a trigger-switching element arranged in the trigger line downstream of the two parallel-operating signal-processing units in such a manner that essentially the same timing period is recorded in both memories during a post-triggering period after a trigger time.

Abstract: The invention relates to a coaxial connecting part which is used to connect a coaxial plug socket to a circuit carrier in an internal conductor. An elastically flexible bellows made of a conductive material is incorporated therein in order to keep axial and radial forces, occurring at the beginning of the socket, away from the substrate.

Abstract: A base station of a mobile communication network is connected to a core network and is operable in a normal mode and in a direct mode. The base station detects a request originating from a first user equipment to communicate with a second user equipment. The first user equipment is in direct reach of the base station. The base station establishes a communication link between the first and the second user equipment, and checks if the second user equipment is also within direct reach of the base station. The base station operates the communication link in direct mode, if yes, and operates the communication link in normal mode, otherwise.

Abstract: An arrangement for measurement demodulation and modulation error measurement of a digitally modulated receive signal, which has a receive filter and a following demodulator for error compensation and for determining the ideal symbol samples. The measuring signal that is filtered in a reference filter and weighting filtered is then evaluated in a following evaluation circuit. The output signal of the demodulator is fed via a measuring filter to the evaluation circuit and the weighting filter function is formed by cascaded filter functions of the receiver filter and measuring filter.

Abstract: To achieve a synchronous output of analog signals generated in two or more digital-to-analog (DAC) converters, an adjustable, digital delay device, of which the delay time is adjustable dependent upon the cross-correlation determined between the analog output signals of the digital-to-analog converters, is provided upstream of at least one of the fifo memories provided for the signal transfer in order to delay the digital signal.

Abstract: A signal delaying device (1) for the dynamic delaying of a digitally sampled input signal comprises a memory element (2) and a series-connected interpolation element (3). According to the invention, a register (30), which can be connected to the output side of the interpolation element (3), is arranged in parallel to the memory element (2) for intermediate storage of at least one sampled value (Sin(k)) of the input signal.

Abstract: A method for performing a statistical test on a device or radio channel, which has N outcomes in the form of N different events, whereby N is higher than two, with the following steps: measuring ns samples of the output of the device or radio channel under test, whereby occurs a specific number (na,nb,ne) of each event, defining a specific limit (L) for the test in a space spanned out by specific numbers of each event, erecting a N-1 dimensional likelihood distribution on several points of the limit (L), and constructing a threshold for fail of the radio channel or device and a threshold for pass of the radio channel or device by summing or integrating the N-1 dimensional likelihood distribution along unbroken paths parallel to the limit L until a predefined confidence level is reached.

Abstract: The invention relates to a module for a measuring device and to a measuring device. The inventive module for a measuring device is provided with a plug-in contact element for the electrical contact of the plug-and-socket plate of the measuring device which is used for data transfer. Said module for the measuring device comprises a main circuit card arranged in the first circuit card space. Said first circuit card space is formed by at least one first element of the body which encompasses the circuit card in a closed manner on the level of the external periphery thereof.

Abstract: In an system for representing a signal on a display device, the signal is fed to a first sampling device and, time-displaced via a time-delay device, is fed at least to a second sampling device for sampling. The sampling values of the first sampled signal and the sampling values of the second sampled signal are appropriately ordered in a first memory control device of a first component connected to the first sampling device in order to compensate a time-delay of the sampling values of the second sampled signal caused by the time-delay device, and are passed to a post-treatment device provided in the first component and connected to the display device.

Abstract: A signal generator comprises at least one first base band unit and a second base band unit, generating a digital base band signal. At least one first frequency offset unit, connected to the first base band unit, which adds the output signal form the second base band unit and the output signal from the frequency offset unit and an I/Q modulator, in series with the addition unit are provided.

Abstract: A rectifier circuit used for weighting pulse disturbances in relation to the influence thereof on digital radio systems, comprising a cascade circuit of an effective value rectifier and a linear average rectifier, wherein a peak value rectifier is arranged upstream from the effective value rectifier.

Abstract: A method and a device for increasing the dynamic range and measuring accuracy of a measuring device for spectrum and/or network analysis images a high-frequency electronic signal within a frequency range into at least two spectra through a first frequency translation by means of a mixer of the measuring device. As a result of the first frequency translation, the spectrum of the high-frequency electronic signal is successively imaged within the resolution bandwidth (?FZF) of an intermediate frequency filter of the measuring device. At the same time, through a second frequency translation, every spectral line of interference signals generated in the measuring device comes to be disposed outside the resolution bandwidth (?FZF) of the intermediate frequency filter.

Abstract: The invention concerns a procedure for estimating unknown amplification factors of a received CDMA signal, which encompasses a plurality of code channels, in which respectively an input signal from a symbol plane is split on a symbol plane through splitting with a split code (?ab(?)) in a chip plane. The procedure is executed in the following steps: formation of a cost function dependent upon estimated values of all unknown amplification factors, partial differentiation of the cost function according to estimated value of the unknown amplification factors, formation of a matrix-vector-equation on the basis that all partial differentials of the cost function are zero and thus a minimum of the cost function is present, and the computation of at least some of the matrix coefficients of the matrix-vector-equation with a correlation function on the symbol plane.