Imaging with wireless communication signals
AssigneeInternational Business Machines Corporation
InventorsJunfeng Guan, Bodhisatwa Sadhu, Arun Paidimarri, Asaf Tzadok, Alberto Valdes Garcia
Life of this patent
Estimating the term…
Abstract
Methods and systems for estimating a distance to an object are described. In an example, a device can receive a reflected signal of a modulated signal being used in a wireless transmission of data. The reflected signal can be a reflection of the modulated signal from at least one object. The device can estimate a distance to the at least one object based on the modulated signal and the reflected signal. Further, the device can use the estimated distance to image a scenery including the at least one object.
Claims19
A method comprising:
- receiving, by a sensing module integrated with a communication device, a modulated signal as a loopback signal, wherein the modulated signal is modulated with data for a designated device, the modulated signal is distributed to the sensing module and to a wireless channel to cause a wireless transmission of the data to the designated device, and the modulated signal uses a plurality of sub-carrier frequencies;
- receiving, by the sensing module integrated with the communication device, a reflected signal of the modulated signal, wherein the reflected signal is a reflection of the modulated signal from at least one object different from the designated device, and the reflected signal includes a plurality of symbols corresponding to the plurality of sub-carrier frequencies;
- performing element-wise division on the plurality of symbols of the reflected signal by corresponding symbols of the loopback signal;
- and
- estimating, by the sensing module integrated with the communication device, a distance to the at least one object based on a frequency response resulting from the element-wise division.
A method comprising:
- receiving a plurality of reflected signals having a plurality of carrier frequencies, the plurality of reflected signals being reflections of a plurality of modulated signals, wherein the plurality of modulated signals uses the plurality of carrier frequencies to wirelessly transmit data;
- estimating a distance to at least one object based on the plurality of modulated signals and the plurality of reflected signals;
- using at least the estimated distance to image a scenery including the at least one object;
- and
- merging a subset of the plurality of reflected signals having different carrier frequencies to modify a resolution of image data corresponding to the imaged scenery.
A system comprising:
- a base station;
- a transmitter configured to output a modulated signal that is modulated with data for a designated device, wherein the modulated signal is distributed to the base station and to a wireless channel to cause a wireless transmission of the data to the designated device, and the modulated signal uses a plurality of sub-carrier frequencies;
- the base station being configured to:
- receive the modulated signal as a loopback signal;
- receive a reflected signal of the modulated signal, wherein the reflected signal is a reflection of the modulated signal from at least one object different from the designated device, and the reflected signal includes a plurality of symbols corresponding to the plurality of sub-carrier frequencies;
- perform element-wise division on the plurality of symbols of the reflected signal by corresponding symbols of the loopback signal;
- and
- estimate a distance to the at least one object based on a frequency response resulting from the element-wise division.
Dependencies are inferred from the claim text.