Directional antenna arrangement method for simulcast broadcasting
First Claim
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1. In a simulcast antenna system covering a geographic area having at least a first and second transmission site and source site for sourcing a digital information signal, a method of improving reception coherence, comprising the steps of:
- A) determining an equal signal level point of transmissions from the first and second transmission site;
B) adjusting at least one of the transmissions from the first and second transmission sites to cause a transmission of the information signal from the first transmission site to arrive at the equal signal level point at substantially the same time as a transmission of the information signal from the second transmission site;
C) comparing transmissions from the first transmission site with transmissions from the second transmission site at various points within the geographic area, to thereby measure at least one reception parameter;
D) selecting a signal radiation pattern for at least one of the first and second transmission sites to optimize the at least one reception parameter.
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Abstract
A method of configuring directional antennas to more fully radiate a geographic region serviced by a simulcast radio system can reduce the number of omni-directional antennas used by prior art methods. Directional antennas having significant differences between frontal and rearward radiated signal levels are used to provide large signal amplitude differences when signal phase differences in the simulcast coverage area become appreciable.
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9 Claims
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1. In a simulcast antenna system covering a geographic area having at least a first and second transmission site and source site for sourcing a digital information signal, a method of improving reception coherence, comprising the steps of:
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A) determining an equal signal level point of transmissions from the first and second transmission site; B) adjusting at least one of the transmissions from the first and second transmission sites to cause a transmission of the information signal from the first transmission site to arrive at the equal signal level point at substantially the same time as a transmission of the information signal from the second transmission site; C) comparing transmissions from the first transmission site with transmissions from the second transmission site at various points within the geographic area, to thereby measure at least one reception parameter; D) selecting a signal radiation pattern for at least one of the first and second transmission sites to optimize the at least one reception parameter. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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Specification