US11209536B2 - Method And Apparatus For Tracking Motion Utilizing Radio Frequency Signals - Google Patents
Detecting motion effectively in quite a lot of environments stays a problem. FIG. 1 illustrates an example house state of affairs, wherein Wi-Fi alerts are scattered by objects, in accordance to at least one embodiment of the current invention. FIG. 2 illustrates an instance object detection system, according to at least one embodiment of the current invention. FIG. 3 illustrates an instance excessive level block diagram of a motion tracing system, according to at least one embodiment of the present invention. FIG. 5 illustrates example operations that could be carried out to detect and monitor a transferring object, in accordance to at least one embodiment of the present invention. FIG. 4 illustrates an instance block diagram of a movement detection/tracing system, according to at least one embodiment of the present invention. FIGS. 6A, 6B and 6C illustrate an instance backscatter channel composed of three impulses, according to one embodiment of the present invention. FIGS. 7A by way of 7D sequentially illustrate intermediate results of an estimation of the backscatter signal after performing the progressive self-interference cancellation, in accordance to at least one embodiment of the present invention.
FIGS. 8A, ItagPro 8B and 8C illustrate example backscatter components obtained from a simulated hand motion in a typical indoor state of affairs using a Wireless tracing software program, according to one embodiment of the current invention. FIGS. 9A and 9B illustrate an example software of Hungarian algorithm for a subset of backscatter components, according to one embodiment of the present invention. FIGS. 10A and 10B illustrate an instance movement of a human hand, according to 1 embodiment of the present invention. FIG. Eleven illustrates instance operations which may be performed by a gadget to detect motion, in accordance with one embodiment of the present disclosure. FIG. 12 illustrates instance operations which may be performed by a iTagPro smart device to trace motion of a moving gadget, in accordance with one embodiment of the present disclosure. FIG. 13 is a simplified block diagram of an exemplary computer or information processing system 1300 through which portions of the movement tracing/detection system, may be embodied.
WiFi transceivers detects and traces motion whereas WiFi transceivers are naturally transmitting packets for communication. Therefore, tracing functionality may be piggybacked on existing WiFi alerts and use current WiFi spectrum without compromising communication or throughput. One embodiment is capable of tracing impartial motion of a number of objects. One embodiment is capable of detecting and tracing movement of one or more those who independently perform units of high-quality-grained movements. Therefore, according to at least one embodiment, radio frequency transceivers, comparable to WiFi transceivers can be utilized as correct, occlusion resistant, high resolution motion cameras capable of working in low mild or dark circumstances. FIG. 1 illustrates an instance home situation, by which radio indicators (e.g., WiFi indicators) are scattered by objects, in accordance to at least one embodiment of the current invention. FIG. 1 illustrates an instance home scenario, by which radio signals (e.g., WiFi alerts) are scattered by objects, iTagPro USA in accordance to at least one embodiment of the current invention.
WiFi AP is being used for accessing the Internet, which is for example a 4-antenna 802.11ac AP. AP receives backscatter reflections from a nearby reflector (e.g., the monitor), as nicely because the faraway reflectors, comparable to hands of individual B. As a result of distinction in distance, iTagPro smart device as well as the fact that faraway backscatter signal has to reflect off or travel by way of walls, there is a substantial difference in signal power between the 2 backscatter elements. As described beneath, one embodiment offers a way to seize and/or estimate weak backscatter indicators. As illustrated in FIG. 1 , the AP receives many backscatter reflections, out of which only a few correspond to reflections from the shifting objects. The reason being the nice propagation properties of WiFi frequencies and the abundance of reflectors in indoor environments. Many objects such as drywalls, tables, chair, laptops and floors replicate signals at the 2.4 GHz and 5 GHz frequencies. The problem is to identify the backscatter alerts which might be mirrored from the transferring objects amongst these multitude of backscatter parts.
FIG. 2 illustrates an instance movement detection/tracing system, in accordance to 1 embodiment. 202 and N transceivers 204 1 via 204 N . WiFi transceivers that are able to tracing and tacking motion may be disposed in a room. Each of the transceivers could transmit a radio frequency sign and obtain backscatter indicators from objects within the setting. 206 and one or more static objects 208 could also be located within the surroundings that mirror the radio frequency signals transmitted by the transceivers 204 1 via 204 N . 206 and ship the estimated parameters to server 202 for extra processing. 202 isolates the backscatter generated by transferring objects, and iTagPro portable traces the motion after combining the measurements from all of the transceivers. FIG. 3 illustrates an instance high-stage block diagram of a motion detection and/or tracing system 300 , according to at least one embodiment. 302 , a backscatter isolating block 304 , and a motion detecting block 306 .