Abstract:
The invention relates to a method for reducing the crest factor in a multi-carrier data transfer system. At least one carrier which is not provided for the data transfer is reserved and peak voltages within the prefix are taken into account in order to reduce the crest factor peak.
Abstract:
The invention relates to a method for transmitting an analogue data stream (101), comprising a regeneration process for reducing transient reactions. According to said method, an input signal (xk) is input into a channel transmission unit (103) and into a unit (108) that increases the sampling rate, the signal is regenerated in a regeneration unit (107), the signal that has been conducted via a unit (108) that increases the sampling rate and a delay unit (120) is conducted through a dummy system unit (123), a sampling rate of the signal that has been conducted through the dummy system unit (123) is reduced in a sampling rate reduction unit (124), the signal that is emitted from the sampling rate reduction unit (124) is overlaid with the signal that has been regenerated in the regeneration unit (107) and the overlaid signal is emitted as an error signal (ek) from the second overlay unit (106). The invention also relates to a regeneration for reducing transient reactions in the frequency range, whereby the signal in the frequency range is impinged by an oversampling factor m.
Abstract:
Die vorliegende Erfindung betrifft eine dynamische Elementanpassung bei Verzögerungsleitungsschaltkreisen (102), um eine Linearitätsbeeinträchtigung und eine Verzögerungsleitungsfehlanpassung zu verringern.
Abstract:
A multiple output time-to-digital converter (TDC) and an Analog-to-Digital Converter (ADC) incorporating the multiple output TDC is disclosed.
Abstract:
A method and a device for interpolating or decimating a signal is provided, the signal being processed by a plurality of signal processing means connected in series, which at least comprise means for increasing or reducing a clock rate of the signal and filtering means. To achieve adaptation to different operating modes or transmission standards, individual portions of the signal processing means connected in series can be bridged by bypasses. In addition, filtering parameters of the filtering means can be varied and factors, by which a clock rate of the signal is increased or reduced, can be changed.
Abstract:
The system has an adaptation device (2) for generation of a compensation signal (KS) from a received broadband signal (eBS) which is superimposed with an amplified sinusoidal signaling signal of a audio system (3). The adaptation device adds the generated compensation signal to a broadband signal (sBS) to compensate a distortion of the sinusoidal signaling signal arising during amplification of the sinusoidal signal. An independent claim is also included for a subscriber telephone exchange with a broadband system.
Abstract:
A transceiver (1) picks up data to be transmitted from a data plated-wire memory via a first data line (3) and writes this data into a register (4). Data to be transmitted is assembled in the data register in data blocks, passed on via second data lines (5) to an encoder (6) to encode it with a Reed Solomon encoding method and converted with Fast Fourier Transformation. The transformed data is then converted to an analog data signal.
Abstract:
The invention relates to a circuit configuration for quantization of digital signals and for filtering quantization noise. Said circuit configuration comprises a multitude of digital control loops connected in series and having quantizers. The digital signals having a word length of m-bits are fed to a first control loop in the series. The quantization error signal of each quantizer is filtered and fed back to the corresponding digital control loop. It is then fed to a downstream digital control loop. The quantized output signal of the first digital control loop is adapted to a third word length of u-bits which is smaller than the first word length. Except for the quantized output signal of the first digital control loop, the quantized output signals of the digital control loops of the series are respectively filtered by a digital filter. In an adder, said quantized output signals are then added to the first quantized output signal of the first digital control loop of the series to prevent quantization errors. The output signal of the adder has a second word length of n-bits and represents the quantized output signal of the circuit configuration.
Abstract:
A transceiver (1) picks up data to be transmitted from a data plated-wire memory via a first data line (3) and writes this data into a register (4). Data to be transmitted is assembled in the data register in data blocks, passed on via second data lines (5) to an encoder (6) to encode it with a Reed Solomon encoding method and converted with Fast Fourier Transformation. The transformed data is then converted to an analog data signal.
Abstract:
The circuit has a controllable voice signal driver circuit (12), a controllable data signal driver circuit (22), a detection circuit (27) and a CODEC circuit (4), whereby the detection circuit has a frequency-dependent impedance that essentially corresponds to the output impedance of the voice signal driver in the data transmission frequency band in the working mode.