Radio frequency (RF)-based ranging and imaging in a wireless communications circuit, particularly for a wireless communications system (WCS)
Radio frequency (RF)-based ranging and imaging in a wireless communications circuit, particularly for a wireless communications system (WCS) is provided. The wireless communications circuit includes an antenna circuit configured to radiate an RF probing signal in a number of directions in a wireless communications cell and receives a number of RF reflection signals corresponding to the RF probing signal. A radar signal processing (RSP) circuit is configured to process the RF reflection signals to detect an obstacle(s) in the wireless communications cell and generate a surrounding image that includes the detected obstacle(s). By generating the surrounding image of the wireless communications cell, it may be possible to detect the obstacle(s) that was not accounted for in an initial deployment design. As a result, it may be possible to adjust a remote unit(s) incorporating the wireless communications circuit to improve RF coverage, throughput, and/or capacity in the wireless communications cell.
1 . A method for performing radio frequency (RF)-based ranging and imaging in a wireless communications circuit, comprising:
radiating an RF probing signal in a plurality of radiation directions in a wireless communications cell;
absorbing a plurality of RF reflection signals corresponding to the RF probing signal radiated in the plurality of radiation directions;
converting the plurality of RF reflection signals into a plurality of digital reflection signals, respectively;
processing the plurality of digital reflection signals based on timing and directionality information related to the RF probing signal to detect one or more obstacles in the wireless communications cell;
generating a surrounding image of the wireless communications cell comprising the one or more detected obstacles;
determining and eliminating a redundant digital reflection signal among the plurality of digital reflection signals that corresponds to a multi-pathed RF reflection signal among the plurality of RF reflection signals and has a propagation duration longer than a predetermined threshold; and
determining an updated position based on the surrounding image.
2 . The method of claim 1 , further comprising repositioning the wireless communications circuit from a present position to the updated position.
3 . The method of claim 2 , further comprising:
identifying the one or more obstacles in the surrounding image; and determining the updated position based on the one or more identified obstacles.
4 . The method of claim 1 , further comprising:
receiving a digital signal from a central unit coupled to the wireless communications circuit; extracting the timing and directionality information from the digital signal; and
converting the digital signal into the RF probing signal.
5 . The method of claim 4 , further comprising forming a plurality of RF beams via an antenna array to radiate the RF probing signal in the plurality of radiation directions in the wireless communications cell.
6 . The method of claim 5 , further comprising:
receiving the digital signal comprising a digital beam discovery signal; and
converting the digital beam discovery signal into the RF probing signal.
7 . The method of claim 5 , further comprising:
receiving the digital signal comprising a downlink digital communications signal; and
converting the downlink digital communications signal into the RF probing signal.
8 . The method of claim 7 , further comprising radiating the RF probing signal via a directional antenna in the plurality of radiation directions in the wireless communications cell.
9 . A method for performing radio frequency (RF)-based ranging and imaging in a wireless communications circuit, comprising:
absorbing a plurality of RF reflection signals corresponding to a RF probing signal radiated in a plurality of radiation directions in a wireless communications cell;
converting the plurality of RF reflection signals into a plurality of digital reflection signals, respectively;
processing the plurality of digital reflection signals based on timing and directionality information related to the RF probing signal to detect one or more obstacles in the wireless communications cell;
generating a surrounding image of the wireless communications cell comprising the one or more detected obstacles;
determining an updated position based on the surrounding image;
eliminating a redundant digital reflection signal among the plurality of digital reflection signals that corresponds to a multi-pathed RF reflection signal among the plurality of RF reflection signals and has a propagation duration longer than a predetermined threshold; and
identifying the one or more obstacles in the surrounding image.
10 . The method of claim 9 , further comprising determining the updated position based on the one or more identified obstacles.
11 . The method of claim 9 , further comprising:
receiving a digital signal from a central unit coupled to the wireless communications circuit; extracting the timing and directionality information from the digital signal; and
converting the digital signal into the RF probing signal.
12 . The method of claim 11 , further comprising forming a plurality of RF beams via an antenna array to radiate the RF probing signal in the plurality of radiation directions in the wireless communications cell.
13 . The method of claim 12 , further comprising:
receiving the digital signal comprising a digital beam discovery signal; and converting the digital beam discovery signal into the RF probing signal.
14 . The method of claim 12 , further comprising:
receiving the digital signal comprising a downlink digital communications signal; and converting the downlink digital communications signal into the RF probing signal.
15 . A method for performing radio frequency (RF)-based ranging and imaging in a wireless communications circuit, comprising:
radiating an RF probing signal in a plurality of radiation directions in a wireless communications cell;
absorbing a plurality of RF reflection signals corresponding to the RF probing signal radiated in the plurality of radiation directions;
converting the plurality of RF reflection signals into a plurality of digital reflection signals, respectively;
eliminating a redundant digital reflection signal among the plurality of digital reflection signals that corresponds to a multi-pathed RF reflection signal among the plurality of RF reflection signals and has a propagation duration longer than a predetermined threshold;
processing the plurality of digital reflection signals based on timing and directionality information related to the RF probing signal to detect one or more obstacles in the wireless communications cell;
generating a surrounding image of the wireless communications cell comprising the one or more detected obstacles;
receiving a digital signal from a central unit coupled to the wireless communications circuit;
extracting the timing and directionality information from the digital signal;
converting the digital signal into the RF probing signal; and
forming a plurality of RF beams via an antenna array to radiate the RF probing signal in the plurality of radiation directions in the wireless communications cell.
16 . The method of claim 15 , further comprising:
receiving the digital signal comprising a digital beam discovery signal; and converting the digital beam discovery signal into the RF probing signal.
17 . The method of claim 16 , further comprising radiating the RF probing signal via a directional antenna in the plurality of radiation directions in the wireless communications cell.
18 . The method of claim 15 , further comprising:
receiving the digital signal comprising a downlink digital communications signal; and converting the downlink digital communications signal into the RF probing signal.
19 . The method of claim 18 , further comprising radiating the RF probing signal via a directional antenna in the plurality of radiation directions in the wireless communications cell.