Smart antenna channel simulator and test system
First Claim
1. A smart antenna simulator for simulating sensor signals for a smart antenna processor, comprising:
- a reference signal;
means for translating assumed environmental and equipment conditions of a smart antenna array into signal conditioning parameters representing delay spread effects, Doppler spread effects, and angular spread effects;
means for tapping said reference signal with said delay spread effects to create a plurality of multipath signals as a function of said assumed environmental and equipment conditions;
means for splitting each said multipath signal into at least one set of channel signals, each channel signal of said set corresponding to a respective sensor of said smart antenna array;
means for modifying said channel signals with Doppler spread effects and angular spread effects as a function of said assumed environmental and equipment conditions;
means for summing respective modified said channel signals across said sets into at least one sensor signal as a function of said reference signal and said assumed environmental and equipment conditions.
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Accused Products
Abstract
There is disclosed a method and apparatus for verifying the integrity of a smart antenna system. A signal simulator replicates the respective signals received at the multiple sensors of the antenna array, with signal parameters that include the correlated effects of Doppler, delay and angular spread. A combination of hardware and software capabilities simulate a primary line-of-sight signal, plus reflected signals and refracted signals, which requires manipulation by the smart antenna processor to extract the temporal and spatial information of the signals of interest. The simulated signals may be varied in numbers, amplitude, phase, delay and bearing components for representing a variety of terrain, environmental, equipment and capacity conditions encountered in alternative environments and conditions. The output of the smart antenna processor is checked against the input parameters to compare, verify and calibrate the smart antenna system.
127 Citations
15 Claims
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1. A smart antenna simulator for simulating sensor signals for a smart antenna processor, comprising:
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a reference signal; means for translating assumed environmental and equipment conditions of a smart antenna array into signal conditioning parameters representing delay spread effects, Doppler spread effects, and angular spread effects; means for tapping said reference signal with said delay spread effects to create a plurality of multipath signals as a function of said assumed environmental and equipment conditions; means for splitting each said multipath signal into at least one set of channel signals, each channel signal of said set corresponding to a respective sensor of said smart antenna array; means for modifying said channel signals with Doppler spread effects and angular spread effects as a function of said assumed environmental and equipment conditions; means for summing respective modified said channel signals across said sets into at least one sensor signal as a function of said reference signal and said assumed environmental and equipment conditions. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A smart antenna simulator, comprising:
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a reference signal; a controller section for translating environmental and equipment conditions of a smart antenna array into signal conditioning parameters representing delay spread effects, Doppler spread effects, angular spread effects, and local scattering effects; a multipath delay section for applying said delay spread effects to said reference signal to generate a plurality of multipath signals; a splitter section for splitting each said multipath signal into a plurality of sets of correlated channel signals, each channel signal of each said set corresponding to a respective sensor of said smart antenna array; a propagation delay section for incorporating said angular spread effects in each said channel signal; a Doppler section for incorporating said Doppler spread effects into each said channel; a local scattering effects section for incorporating said local scattering effects into each said channel; and a summing section for summing respective said channel signals across said sets of channels signals into corresponding sensor signals.
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Specification