Switched beam antenna with digitally controlled weighted radio frequency combining
First Claim
Patent Images
1. A wireless communication system comprising:
- a plurality of antenna elements;
a selector for selecting a sub-set of received radio frequency signals from said antenna elements;
a combiner for combining said sub-set of received radio frequency signals into a single radio frequency signal;
a processing chain for processing and demodulating said single radio frequency signal and for generating at least a radio performance indicator representative of the quality of said single radio frequency signal;
a processor detecting said radio performance indicator for generating a selection signal(s) for said selector and a phase shift signal for said radio frequency phasing network in order to obtain a single radio frequency signal having a radio performance indicator within a predetermined range; and
a radio frequency phasing network for co-phasing said selected radio frequency signals before combining in said combiner by applying a phase shift to at least one signal in said sub-set.
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Abstract
A wireless communication system, wherein a sub-set of radio frequency signals received from corresponding antenna elements is selected and combined into a single radio frequency signal, the single radio frequency signal being processed and demodulated in a single processing chain, includes a radio frequency phasing network for co-phasing the selected radio frequency signals before combining and a processor for controlling combining and phasing in order to obtain a single radio frequency signal having a radio performance indicator which satisfies predetermined conditions.
67 Citations
24 Claims
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1. A wireless communication system comprising:
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a plurality of antenna elements; a selector for selecting a sub-set of received radio frequency signals from said antenna elements; a combiner for combining said sub-set of received radio frequency signals into a single radio frequency signal; a processing chain for processing and demodulating said single radio frequency signal and for generating at least a radio performance indicator representative of the quality of said single radio frequency signal; a processor detecting said radio performance indicator for generating a selection signal(s) for said selector and a phase shift signal for said radio frequency phasing network in order to obtain a single radio frequency signal having a radio performance indicator within a predetermined range; and a radio frequency phasing network for co-phasing said selected radio frequency signals before combining in said combiner by applying a phase shift to at least one signal in said sub-set. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 24)
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12. A method of processing a radio frequency signal in a radio communication system, said signal being received by a plurality of antenna elements, comprising the steps of:
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selecting a sub-set of received radio frequency signals from said antenna elements; combining said sub-set of received radio frequency signals into a single radio frequency signal; processing and demodulating said single radio frequency signal for generating at least a radio performance indicator representative of the quality of said single radio frequency signal; subjecting signals in said sub-set of received radio frequency signals to co-phasing, by applying a phase shift to at least one signal in said sub-set; detecting said radio performance indicator; and selecting a combination of sub-set of received radio frequency signals and a phase shift for said co-phasing step, in order to obtain a single radio frequency signal having a radio performance indicator within a predetermined range. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23)
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Specification