Multiband receiver and method associated therewith
AssigneeSiemens Aktiengesellschaft
InventorChiron van der Burgt
Life of this patent
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Abstract
A multiband receiver and associated method are provided for simultaneous reception of a number of RF signals with partially different carrier frequencies. An RF/IF converter is provided with a number of local oscillators corresponding to a number of RF signals in order to produce L0 in phase components corresponding to the carrier frequencies and quadrature components; in addition to an in-phase mixer and a quadrature mixer for mixing the respective L0 in-phase and quadrature components with the RF signals in order to produce intermediate frequency signals with IF in-phse components and IF quadrature components. A complex fiber carries out complex filtering on the basis of the intermediate frequency signals in order to suppress reflected intermediate frequency signals.
Claims23
A multiband receiver for simultaneous reception of a plurality of multiband RF signals, at least some of which being at different carrier frequencies, comprising:
- an RF receiving part for processing the RF signals;
- an RF/IF converter for converting the plurality of RD signals to a plurality of analog intermediate frequency signals, the RF/IF converter including a plurality of local oscillators corresponding to the plurality of RF signals for producing LO signals, which are associated with the carrier frequencies and have LO in-phase components and LO quadrature components, the RF/IF converter also including an in-phase mixer and a quadrature mixer for mixing the respective LO in-phase and quadrature components with the RF signals so as to produce the intermediate frequency signals with IF in-phase components and IF quadrature components in an intermediate frequency band, the RF/IF converter further including a complex filter for effecting complex filtering based on the intermediate frequency signals so as to suppress mirror-image intermediate frequency signals;
- an IF receiving part for processing the intermediate frequency signals;
- an A/D converter for converting the analog intermediate frequency signals to digital intermediate frequency signals;
- and
- a digital signal processing part for digital signal processing of the digital intermediate frequency signals and for producing recovered data signals, wherein the digital signal processing part includes a plurality of local oscillators for producing digital signal components associated with the intermediate frequency signals, and a plurality of digital low-pass filters for filtering the digital signal components.
A multiband receiver for simultaneous reception of a plurality of multiband RF signals as claimed in 1, wherein the intermediate frequency signals are produced in a low intermediate frequency band, with the complex filters shifting the phase of the associated IF in-phase components and IF quadrature components so as to at least partially cancel out the mirror-image intermediate frequency signals.
A method for simultaneous reception of a plurality of multiband RF signals, at least some of which being at different carrier frequencies, the method comprising the steps of:
- providing RF reception for processing the RF signals;
- effecting RF/IF conversion so as to convert the plurality of RF signals to a plurality of analog intermediate frequency signals, with a plurality of LO signals, which correspond to the plurality of RF signals, which are associated with the carrier frequencies and have LO in-phase components and LO quadrature components are produced, wherein the LO in-phase and quadrature components are mixed with the RF signals so as to produce the intermediate frequency signals with IF in-phase components and IF quadrature components in an intermediate frequency band, and wherein complex filtering is effected based on the intermediate frequency signals so as to suppress mirror-image intermediate frequency signals;
- providing IF reception for processing the intermediate frequency signals;
- effecting A/D conversion so as to convert the analog intermediate frequency signals to digital intermediate frequency signals;
- and
- effecting digital signal processing of the digital intermediate frequency signals and producing recovered data signals, wherein during the digital signal processing, a plurality of local oscillators produce digital signal components associated with the intermediate frequency signals, and wherein the digital signal components are provided to a plurality of digital tow-pass filter for filtering.
Dependencies are inferred from the claim text.