Calibration of received signal strength indication
First Claim
1. A method for calibrating received signal strength indication within a radio frequency integrated circuit (RFIC), the method comprises:
- concurrently enabling a transmitter portion of the RFIC and a receiver portion of the RFIC;
providing a zero input to the transmitter portion, wherein the transmitter portion up converts the zero input via a mixer section to produce a radio frequency (RF) signal;
measuring received signal strength of the RF signal as received by the receiver portion while the transmitter portion and receiver portion are concurrent enabled to produce a measured received signal strength;
comparing the measured received signal strength with a desired zero-input signal strength value; and
when the measured received signal strength compares unfavorably to the desired zero-input signal strength value, scaling a received signal strength to power level table based on a difference between the measured received signal strength and the desired zero-input signal strength value.
6 Assignments
0 Petitions
Accused Products
Abstract
Calibration of received signal strength indication (RSSI) within a radio frequency integrated circuit (RFIC) begins by concurrently enables a transmitter portion and receiver portion. With both the transmitter and receiver enabled, the RFIC provides a zero input to the transmitter portion, where the zero input is an effective zero input based on the input circuitry of the transmitter portion. The RFIC then measures, via the receiver portion, the received signal strength of the RF signal generated by the transmitter portion regarding the zero input signal. The RFIC then compares the measured received signal strength with a desired zero input signal strength value. If the measured received signal strength compares unfavorably with the desired zero input signal strength value (e.g., differ by more than a few percentage points), the received signal strength to power level table within the RFIC, which is used to convert a measured voltage into a dBm value, is scaled based on the difference between the measured received signal strength and the desired zero input signal strength value.
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Citations
9 Claims
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1. A method for calibrating received signal strength indication within a radio frequency integrated circuit (RFIC), the method comprises:
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concurrently enabling a transmitter portion of the RFIC and a receiver portion of the RFIC;
providing a zero input to the transmitter portion, wherein the transmitter portion up converts the zero input via a mixer section to produce a radio frequency (RF) signal;
measuring received signal strength of the RF signal as received by the receiver portion while the transmitter portion and receiver portion are concurrent enabled to produce a measured received signal strength;
comparing the measured received signal strength with a desired zero-input signal strength value; and
when the measured received signal strength compares unfavorably to the desired zero-input signal strength value, scaling a received signal strength to power level table based on a difference between the measured received signal strength and the desired zero-input signal strength value. - View Dependent Claims (2, 3)
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4. An apparatus for calibrating received signal strength indication within a radio frequency integrated circuit (RFIC), the apparatus comprises:
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processing module; and
memory operably coupled to the processing module, wherein the memory includes operational instructions that cause the processing module to;
concurrently enable a transmitter portion of the RFIC and a receiver portion of the RFIC;
provide a zero input to the transmitter portion, wherein the transmitter portion up converts the zero input via a mixer section to produce a radio frequency (RF) signal;
measure received signal strength of the RF signal as received by the receiver portion while the transmitter portion and receiver portion are concurrent enabled to produce a measured received signal strength;
compare the measured received signal strength with a desired zero-input signal strength value; and
when the measured received signal strength compares unfavorably to the desired zero-input signal strength value, scale a received signal strength to power level table based on a difference between the measured received signal strength and the desired zero-input signal strength value. - View Dependent Claims (5, 6)
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7. A radio frequency integrated circuit (RFIC) comprises:
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transmitter section operably coupled to convert outbound data into outbound radio frequency (RF) signals;
receiver section operably coupled to convert inbound RF signals into inbound data;
received signal strength indicator operably coupled to measure signal strength of the inbound RF signals to produce a measured signal strength; and
calibration module operably coupled to calibrate the measured signal strength by;
concurrently enabling the transmitter section and the receiver section;
providing a zero input to the transmitter section, wherein the transmitter section up converts the zero input via a mixer section to produce the outbound RF signal;
measuring received signal strength of the outbound RF signal as received by the receiver section while the transmitter section and receiver section are concurrent enabled to produce a measured received signal strength;
comparing the measured received signal strength with a desired zero-input signal strength value; and
when the measured received signal strength compares unfavorably to the desired zero-input signal strength value, scaling a received signal strength to power level table based on a difference between the measured received signal strength and the desired zero-input signal strength value. - View Dependent Claims (8, 9)
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Specification