Back to results
US 9,807,646 B1Granted
Determining noise levels in electronic environments
AssigneeAmazon Technologies, Inc.
InventorMilos Jorgavanovic
Life of this patent
Estimating the term…
Abstract
Various approaches discussed herein enable establishing a wireless data connection between one or more devices. A signal to noise ratio (SNR) is determined for the wireless connection, based on an estimate of internal noise associated with a wireless networking component. Another SNR determination is then made, using data such as a Modulation and Coding Scheme (MCS) index value corresponding to the connection, and the difference between the two SNR determinations may be utilized to determine a noise estimate that takes both internal and external noise into account and is utilized as part of baseband signal demodulation.
Claims20
A computer implemented method, comprising:
- establishing, by a device having a wireless network component and a High-Definition Multimedia Interface (HDMI) component, a wireless network connection to a wireless access point, the wireless network component having a first noise value stored at the device, the first noise value corresponding to at least internal noise generated by the wireless network component;
- determining, by the device, an estimated signal-to-noise ratio (SNR) associated with the wireless network connection, the estimated SNR based on a comparison of a received signal strength indication (RSSI) value corresponding to the wireless network connection and the first noise value;
- determining, by the device, a modulation and coding scheme (MCS) number associated with the wireless network connection, the MCS number contained in a first packet received from the wireless access point;
- determining, by the device, a derived SNR of the wireless network connection, the derived SNR corresponding to the MCS number in mapping data stored at the device, the mapping data providing a correspondence between a list of SNR values and a list of MCS numbers;
- determining, by the device, a second noise value, the second noise value comprising the first noise value summed with an absolute value of a difference between the estimated SNR and the derived SNR;
- determining, by the device, a noise difference value substantially corresponding to noise generated by the HDMI component, the noise difference value comprising a difference between the second noise value and the first noise value;
- storing, at the device, the noise difference value;
- determining, by the device, a new SNR comprising a sum of the noise difference value and the first noise value;
- demodulating, at the device, the first packet to form a demodulated first packet;
- and
- communicating, by the device, the new SNR value and demodulated first packet to a decoder executing at the device.
8 more elements
A computer implemented method comprising:
- establishing, by a first device, a wireless network connection with a second device;
- determining, by the first device, a first signal-to-noise ratio (SNR) of the wireless network connection, the first SNR based at least in part on a first received signal strength indication (RSSI) value associated with the wireless network connection and a first noise value stored at the first device, the first noise value corresponding to at least internal noise associated with the first device;
- determining, by the first device, a second SNR, the second SNR based at least on a first modulation and coding scheme (MCS) number associated with the wireless network connection;
- determining, by the first device, a second noise value, the second noise value based at least on the first noise value and a difference between the first SNR and the second SNR;
- determining, by the first device, a noise difference value comprising a difference between the second noise value and the first noise value;
- determining, by the first device, a third SNR comprising a sum of the noise difference value and the first noise value;
- and
- decoding, by the first device, data transmissions received over the wireless network connection from the second device based at least in part on the third SNR.
5 more elements
A device, comprising:
- at least one processor;
- a wireless network component;
- and
- memory including instructions that, when executed by the processor, cause the computing device to:
- establish a wireless network connection with a second device;
- determine a first signal-to-noise ratio (SNR) of the wireless network connection, the first SNR based at least in part on a first received signal strength indication (RSSI) value associated with the wireless network connection and a first noise value stored at the device, the first noise value corresponding to at least internal noise associated with the device;
- determine a second SNR, the second SNR based at least on a first modulation and coding scheme (MCS) number associated with the wireless network connection;
- determine a second noise value, the second noise value based at least on the first noise value and a difference between the first SNR and the second SNR;
- determine a noise difference value comprising a difference between the second noise value and the first noise value;
- determine a third SNR comprising a sum of the noise difference value and the first noise value;
- and
- decode data transmissions received over the wireless network connection from the second device based at least in part on the second noise value.
9 more elements
Dependencies are inferred from the claim text.