Reception method and base station receiver
First Claim
1. A reception method in a CDMA cellular radio system, comprising:
- in each cell, at least one base station communicating with a plurality of mobile stations located within its area, said base station measuring a direction angle of a signal arriving from each said mobile station to said base station, said base station transmitting and receiving signals of said mobile stations by an antenna array by phasing a signal to be transmitted and received so that a gain obtained from said antenna array is largest in a desired direction, said antenna array comprising several elements,wherein detection of a desired signal uses simultaneously, signals received from said plurality of mobile stations, an incoming direction of said signals being taken into account when selecting said signals.
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Accused Products
Abstract
A base station receiver and a reception method in a CDMA cellular radio system includes, in each cell, at least one base station communicating with a plurality of mobile stations situated within its area. The base stations measure the direction angle of a signal arriving from each mobile station with respect to the base station, and communicate with the mobile stations using antenna beams that change in time. The angles of the greatest gain of the beams are adjusted according to signal components arriving from the mobile station. In order to provide detection of good quality without a great deal of calculation, the detection of the desired signal utilizes simultaneously several signals received from different mobile stations taking into account the incoming direction of the signals when selecting the signals.
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Citations
14 Claims
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1. A reception method in a CDMA cellular radio system, comprising:
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in each cell, at least one base station communicating with a plurality of mobile stations located within its area, said base station measuring a direction angle of a signal arriving from each said mobile station to said base station, said base station transmitting and receiving signals of said mobile stations by an antenna array by phasing a signal to be transmitted and received so that a gain obtained from said antenna array is largest in a desired direction, said antenna array comprising several elements, wherein detection of a desired signal uses simultaneously, signals received from said plurality of mobile stations, an incoming direction of said signals being taken into account when selecting said signals. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A base station receiver, comprising:
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an antenna array comprising several elements; a plurality of radio-frequency units connected to said antenna array; a plurality of detectors, said detectors comprising a plurality of filters and a plurality of signal detectors adapted to a signal to be received; a phaser which phases said received signal so that a gain obtained from said antenna array is largest in said desired direction; a first detector which performs preliminary estimation on received signal components, an input to said first detector being a signal from said radio-frequency units; a switching matrix, an input to said switching matrix being a signal from said first detector, a second detector which performs signal detection and estimation by using a plurality of signal components received from different terminal equipment, an input to said second detector being a signal from said radio-frequency units and output signal of said switching matrix; and a controller which selects and guides, by said switching matrix, signals to be used based on their incoming direction from said first detector to said second detector. - View Dependent Claims (8, 9, 10, 11, 12, 13, 14)
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Specification