Abstract: A method includes a step of reading in the radio data signal and a radio data clock signal, a step of integrating a signal that is a function of the radio data signal and/or the radio data clock signal in order to determine an integral value curve, a step of decoding radio data signal information from the integral value curve, using the radio data clock signal and/or a phase position of the radio data signal, a step of ascertaining radio data signal quality information which represents the credibility of the decoded radio data signal information, using the radio data signal and/or the phase position of the radio data signal, and a step of providing the radio data signal information and the radio data signal quality information in order to provide a conditioned radio data signal.

Abstract: A DARC signal demodulation circuit assemblage for recovering a DARC signal (DARC data) from an FM multiplex transmission signal includes: a pilot tone regulation circuit to obtain first and second mutually orthogonal oscillation synchronous with a stereo pilot tone encompassed by the FM multiplex transmission signal; a frequency quadruplication section for obtaining third and fourth mutually orthogonal oscillation having a frequency quadrupled as to the stereo pilot tone; a first multiplication section for obtaining a first multiplication signal from the FM multiplex transmission signal and from the third oscillation; a second multiplication section for obtaining a second multiplication signal from the FM multiplex transmission signal and from the fourth oscillation; first/second low-pass filters for obtaining first/second DARC signal components by low-pass filtration of the first and second multiplication signals; and an FM demodulation section for obtaining the DARC signal from a frequency demodulation of t

Abstract: A method includes a step of reading in the radio data signal and a radio data clock signal, a step of integrating a signal that is a function of the radio data signal and/or the radio data clock signal in order to determine an integral value curve, a step of decoding radio data signal information from the integral value curve, using the radio data clock signal and/or a phase position of the radio data signal, a step of ascertaining radio data signal quality information which represents the credibility of the decoded radio data signal information, using the radio data signal and/or the phase position of the radio data signal, and a step of providing the radio data signal information and the radio data signal quality information in order to provide a conditioned radio data signal.

Abstract: A DARC signal demodulation circuit assemblage for recovering a DARC signal (DARC data) from an FM multiplex transmission signal includes: a pilot tone regulation circuit to obtain first and second mutually orthogonal oscillation synchronous with a stereo pilot tone encompassed by the FM multiplex transmission signal; a frequency quadruplication section for obtaining third and fourth mutually orthogonal oscillation having a frequency quadrupled as to the stereo pilot tone; a first multiplication section for obtaining a first multiplication signal from the FM multiplex transmission signal and from the third oscillation; a second multiplication section for obtaining a second multiplication signal from the FM multiplex transmission signal and from the fourth oscillation; first/second low-pass filters for obtaining first/second DARC signal components by low-pass filtration of the first and second multiplication signals; and an FM demodulation section for obtaining the DARC signal from a frequency demodulation of t

Abstract: A method for direct sampling of a plurality of radio bands, including a step of receiving a first radio band via a first interface and at least one additional radio band via at least one additional interface, the first radio band and the at least one additional radio band each being associated with different frequency ranges, and the first radio band or the at least one additional radio band being a DAB band. Furthermore, a selection signal is received via an interface, the selection signal indicating whether further processing of the first radio band and/or the at least one additional radio band takes place. Depending on the selection signal, the first radio band is sampled at a common sampling frequency and/or the at least one additional radio band is sampled at the common sampling frequency.

Abstract: A system for receiving radio stations includes: at least one A/D converter in order to digitize the entire desired frequency band, for instance, an FM band, received via at least one antenna, and a demodulation unit for demodulating at least two signals of different transmitting frequencies of a radio station.

Abstract: A system for receiving radio stations includes: at least one A/D converter in order to digitize the entire desired frequency band, for instance, an FM band, received via at least one antenna, and a demodulation unit for demodulating at least two signals of different transmitting frequencies of a radio station.

Abstract: A method for direct sampling of a plurality of radio bands, including a step of receiving a first radio band via a first interface and at least one additional radio band via at least one additional interface, the first radio band and the at least one additional radio band each being associated with different frequency ranges, and the first radio band or the at least one additional radio band being a DAB band. Furthermore, a selection signal is received via an interface, the selection signal indicating whether further processing of the first radio band and/or the at least one additional radio band takes place. Depending on the selection signal, the first radio band is sampled at a common sampling frequency and/or the at least one additional radio band is sampled at the common sampling frequency.

Abstract: A method and a device for a receiver for electromagnetic waves having at least two antennas are described; using this method and this device it is possible to effectively suppress multipath interference, while a portion of the antenna signals may also be utilized for other purposes at least temporarily, e.g., to allow better utilization of the possibilities of RDS activities. To do so, a first antenna signal (1) is used as the basis for generating a playback signal (23) when the signal quality of the first antenna signal (1) is above a defined threshold for undisturbed reception—case 1. In this case 1, the signal quality of the first antenna signal (1) is determined. If the signal quality of the first antenna signal (1) falls below this threshold—case 2—then a new signal y generated from at least two antenna signals (1, 2) is used as the basis for generating the playback signal (23).

Abstract: A method and a device for a receiver for electromagnetic waves having at least two antennas are described; using this method and this device it is possible to effectively suppress multipath interference, while a portion of the antenna signals may also be utilized for other purposes at least temporarily, e.g., to allow better utilization of the possibilities of RDS activities. To do so, a first antenna signal (1) is used as the basis for generating a playback signal (23) when the signal quality of the first antenna signal (1) is above a defined threshold for undisturbed reception—case 1. In this case 1, the signal quality of the first antenna signal (1) is determined. If the signal quality of the first antenna signal (1) falls below this threshold—case 2—then a new signal y generated from at least two antenna signals (1, 2) is used as the basis for generating the playback signal (23).

Abstract: The present invention is directed to a sigma-delta D-A converter (300) with N stages, in which the nth stage, where n=1, 2, 3 . . . N, comprises a first adder (10) which adds a use signal x(k) (12) with an error signal errn(k−1) to an input signal en(k) (14), a quantizer (16) which quantizes the input signal en(k) (14) to an output signal yn(k) (18) according to a predetermined quantization function, and a second adder (20) which adds the input signal en(k) (14) with the inverted output signal yn(k) to xn(k) (21), and supplies it to a delay device (22) which sends the signal xn(k) (21) to the first adder (10) as an error signal errn(k−1) with a delay by a clock period.

Abstract: A process and apparatus for synchronizing the block counter of an RDS radio data receiver is described. According to the process, the bits stored in a 26-bit shift register, are cycled at least n times in said register, n being the number of allowable offset words, and the shift register content is X-OR gated with another offset word in a given sequence for each cycle. The gating result is received by a syndrome detection circuit, which triggers a sync pulse when the zero syndrome is detected, and the sync pulse resets the bit counter to zero and sets the block counter to the address counter status assigned to the offset word in the offset word generator.

Abstract: A device for synchronization of a block counter in an RDS receiver, the decoder of which, after synchronization has been effected, is capable of performing an error correction in the received bits. The process steps which can lead to synchronization of the block counter are integrated into the process steps for error correction, and are repeated in each bit period.

Abstract: A mixer oscillator with a phase-locked loop control loop for a radio receiver is described in which a digital loop filter in the control loop includes which an integrator for digital output signals of a phase discriminator which is preprogrammed frequency jumps. The digital loop filter includes two switchable integrators for optional alternate switching of alternate test frequencies.

Abstract: In a circuit for a demodulator of a radio data signal in a radio receiver, the multiplex signal in digital form is mixed into the baseband, in two phase positions shifted 90.degree. with respect to each other, after band-pass filtering, together with a reference carrier generated at a sampling clock rate produced in the radio receiver, thus producing a first and a second mix signal. A first and a second auxiliary signal with, respectively, a sine waveform and a cosine waveform are produced. The first mix signal is multiplied by the first auxiliary signal, and the second mix signal by the second auxiliary signal. The results of these multiplications are added together, producing a first output signal. The first mix signal is multiplied by the second auxiliary signal, and the second mix signal by the first auxiliary signal, and the results subtracted from each other, thus producing a second output signal.

Abstract: Digital tuning of a locally generated frequency supplied to a frequency converting mixer, a mobile radio receiver is provided with great economy of components by utilizing the sampling rate oscillator for an analog-to-digital converter provided at the output of an analog intermediate frequency amplifier of the receiver as the source of the difference frequency for a phase locked loop (PLL) for control of the phase of a local oscillator for the mixer or mixers. All frequencies used to supply local oscillations to mixers, as well as the operating frequency of the phase locked loop are integer number multiples of the sampling rate pulse generator. Some division stages have fixed dividers and others have divisors selectable by a tuning processor and in some of the divisor connections it is useful to interpose a fixed or selectable-factor multiplier. A sampling rate of 42.75 MHz is recommended and an intermediate frequency amplifier frequency which is a rational number multiple of 57 kHZ, preferably 10.

Abstract: A new digital oscillator is described that can be synchronized with a broadcast digital input signal by iteratively rotating the phase of the complex oscillator signal by increasing or decreasing the components, depending upon the phase difference between the broadcast signal and the oscillator output signal.