Reception diversity method, and a radio communication system using diversity reception
AssigneeSiemens Aktiengesellschaft
InventorStefan Oestreich
Life of this patent
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Abstract
A radio diversity method in which a first received signal is received by a first antenna and a second received signal is received by a second antenna. The first received signal and the second received signal are converted from an analog format to a digital format. Digital signal values are in each case detected, with quality levels being defined in each case for the digital signal values. An evaluation device evaluates the quality levels and, depending on the evaluation result, passes on only portions of the digital signal values for subsequent combination. This reduces the data rate that needs to be transmitted, for example, during a soft hand over.
Claims12
A method for reception diversity, which comprises:
- receiving a first received signal via a first antenna;
- receiving a second received signal via a second antenna;
- converting the first received signal and the second received signal from an analog format to a digital format resulting in digital signal values;
- detecting the digital signal values;
- defining quality levels for the digital signal values;
- evaluating in an evaluator the quality levels;
- and
- choosing a method to be used for a diversity combination by the evaluator, and requesting only portions of the digital signal values required for the diversity combination, in dependence on results of an evaluation.
A radio communication system using diversity reception, comprising:
- at least two base stations including a first base station having an antenna receiving a first received signal and a second base station having an antenna receiving a second received signal;
- analog/digital converters disposed in said at least two base stations for converting the first received signal and the second received signal from an analog format to a digital format resulting in digitally received signals;
- detectors for detecting the digitally received signals and for producing digital signal values, said detectors defining quality levels for the digital signal values of the first received signal and the second received signal;
- a base station controller for connecting said at least two base stations to components on a network side;
- and
- an evaluator disposed in said base station controller, said evaluator evaluating at least a portion of the quality levels and, in dependence on results of an evaluation, said evaluator requesting only portions of the digital signal values for forwarding on from said at least two base stations.
Dependencies are inferred from the claim text.