System and method for steering directional antenna for wireless communications
AssigneeTexas Instruments Incorporated
InventorsMichael E. Wilhoyte, Michael V. Goettemoeller
Life of this patent
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Abstract
A system and method for determining an optimal antenna position of a directional antenna in a wireless communication system are described. The optimal antenna position is determined by calculating a steering metric value for possible antenna positions and the antenna position with the highest steering metric value is selected as the optimal antenna position.
Claims8
A method of determining an optimal antenna position of a directional antenna in a wireless communication system, comprising
- calculating a steering metric value SM(k) at each data rate index (k) for a plurality of possible beam positions for the directional antenna;
- and
- selecting one of the plurality of possible antenna positions for the directional antenna having a highest steering metric value, wherein the steering metric value SM(k) is given by:
- SM(k)=(1−C(k))*(0.5−PER(k))+[C(k)*(G(k)−meanG)]/sigmaG,
- where:
- k=a data rate index of the wireless communication channel,
- C(k)=a weight applied based on data rate of the wireless communication channel,
- PER(k)=an estimated packet error rate of the wireless communication channel,
- G(k)=gain reduction applied during reception of an acknowledgement packet on the wireless communication channel,
- meanG=a constant mean value of G(k) determined based on empirical data from data collection at various data rates, and
- sigmaG=standard deviation of the G(k) determined based on empirical data from data collection at various data rates.
A system for determining an optimal antenna position of a directional antenna in a wireless communication system, comprising:
- a transceiver;
- a beam steering unit coupled to the transceiver;
- and
- a steering metric calculating unit coupled to the transceiver, wherein
- the steering metric calculating unit is configured to
- calculate a steering metric value SM(k) at each data rate index (k) for a plurality of possible antenna positions for the directional antenna;
- and
- select one of the plurality of possible antenna positions for the directional antenna having a highest steering metric value, wherein the steering metric value SM(k) is given by:
- SM(k)=(1−C(k))*(0.5−PER(k))+[C(k)*(G(k)−meanG)]/sigmaG,
- where:
- k=a data rate index of the wireless communication channel,
- C(k)=a weight applied based on data rate of the wireless communication channel,
- PER(k)=an estimated packet error rate of the wireless communication channel,
- G(k)=gain reduction applied during reception of an acknowledgement packet on the wireless communication channel,
- meanG=a constant mean value of G(k) determined based on empirical data from data collection at various data rates, and
- sigmaG=standard deviation of the G(k) determined based on empirical data from data collection at various data rates.
Dependencies are inferred from the claim text.