Abstract:
Es wird ein Verfahren zur Direktabtastung einer Mehrzahl von Radiobändern vorgeschlagen, das einen Schritt des Empfangens eines ersten Radiobands (331) über eine erste Schnittstelle und mindestens eines weiteren Radiobands (332, 333) über mindestens eine weitere Schnittstelle umfasst, wobei das erste Radioband (331) und das mindestens eine weitere Radioband (332, 333) jeweils unterschiedlichen Frequenzbereichen zugeordnet sind und es sich bei dem ersten Radioband oder dem mindestens einen weiteren Radioband um ein DAB-Band handelt. Ferner erfolgt ein Empfangen (104) eines Auswahlsignals über eine Schnittstelle, wobei das Auswahlsignal anzeigt, ob eine Weiterverarbeitung des ersten Radiobands (331) und/oder des mindestens einen weiteren Radiobands (332, 333) erfolgt. Abhängig von dem Auswahlsignal erfolgt ein Abtasten des ersten Radiobands (331) mit einer gemeinsamen Abtastfrequenz und/oder des mindestens einen weiteren Radiobands (332, 333) mit der gemeinsamen Abtastfrequenz.
Abstract:
The invention relates to an electronic device (50) comprising a headset connector (51) adapted to connect a headset (56) to the electronic device (50) and an active amplifier circuit (54) connected to the headset connector (51). The active amplifier circuit (54) is adapted to amplify radio signals received by an antenna (56), which is connected to the electronic device (50) via the headset connector (51). The invention relates equally to a chip comprising such an active amplifier circuit (54), to a system comprising the electronic device and to a corresponding method for receiving radio signals at such an electronic device.
Abstract:
A method for detecting the digital quality of a radio signal includes: receiving a radio signal including an analog modulated portion; digitally sampling an analog modulated portion of the radio signal to produce a plurality of samples; using a ratio between an average magnitude and an RMS magnitude of a block of the samples to compute an analog signal quality metric. Receivers that implement the method are also provided.
Abstract:
A method for detecting the digital quality of a radio signal includes: receiving a radio signal including a digital portion modulated by a series of symbols each including a plurality of samples; computing correlation points between endpoint samples in cyclic prefix regions of adjacent symbols; and using the correlation points to produce a digital signal quality metric. Receivers that implement the method are also provided.
Abstract:
A method for detecting the digital quality of a radio signal includes: receiving a radio signal including a digital portion modulated by a series of symbols each including a plurality of samples; computing correlation points between endpoint samples in cyclic prefix regions of adjacent symbols; and using the correlation points to produce a digital signal quality metric. Receivers that implement the method are also provided.
Abstract:
A method for detecting the digital quality of a radio signal includes: receiving a radio signal including a digital portion modulated by a series of symbols each including a plurality of samples; computing correlation points between endpoint samples in cyclic prefix regions of adjacent symbols; and using the correlation points to produce a digital signal quality metric. Receivers that implement the method are also provided.
Abstract:
A Digital Radio Mondiale (DRM) receiver and demodulation method includes an analog and digital separation filter for filtering and separating a DRM-encoded signal and a non DRM-encoded signal from a composite RF signal received at the receiver. The DRM receiver includes a programmable downsampler and a programmable N-point Fast Fourier Transform (FFT) to recover and demodulate the OFDM symbols in a received DRM-encoded RF signal. The received signal is digitally sampled at a rate operably integer downsampled to achieve a number N samples in the useful portion of the OFDM symbol for input to an N-point FFT, where N equal to a power of two. The downsampling rate and size (N-points) of the FFT depend on the DRM encoding and transmission parameters, notably the robustness mode and spectrum occupancy. The structure and operation of the receiver in this manner simplifies the design and reduces the required filter order of the analog and digital separation filter.
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:
The disclosure relates to a radio broadcasting method for a first multicarrier digital signal occupying a first frequency band adjacent to at least one second frequency band, each assigned to a second signal. Pre-filtering is applied to the said first signal before its emission so as to attenuate the power of the said first signal in at least a first portion of the said first frequency band, adjacent to the said second frequency band(s).