Device with steering and channel stitching for an extended bandwidth

1 . A radio frequency (RF) device, comprising:

a first channel configured to receive a first signal in a first frequency band;

a second channel configured to receive a second signal in a second frequency band that is different from the first frequency band; and

control circuitry configured to:

obtain a first channel response associated with the first channel using the received first signal;

obtain a second channel response associated with the second channel using the received second signal;

calibrate the first channel response and the second channel response by steering to a calibration base; and

combine the first channel response and second channel response by channel stitching to obtain a combined channel response;

wherein the control circuitry is further configured to:

identify a peak from one of a group consisting of the first channel response and the second channel response;

define a calibration base window based on the identified peak; and

calibrate initial steering coefficients on the identified peak; and

iteratively adjust steering coefficients over the calibration base window to identify a first peak.

2 . The device according to claim 1 ,

wherein the first frequency band and the second frequency band are adjacent to each other or non-adjacent to each other.

3 . The device according to claim 2 ,

wherein there is a gap between the first frequency band and the second frequency band.

4 . The device according to claim 1 ,

wherein the device is an ultra-wide band (UWB) device.

5 . The device according to claim 1 ,

wherein the peak may include one selected from the group consisting of:

a dominant peak;

a most dominant peak;

a dominant multipath component;

a target peak; and

a self-interference peak.

6 . The device according to claim 5 , wherein calibration is performed to correct at least:

a constant phase offset, or

a steering phase offset between the first channel response and the second channel response.

7 . The device according to claim 5 ,

wherein steering is performed to center a first phase of the first channel response and a second phase of the second channel response to obtain a coherence of the first channel response and the second channel response.

8 . The device according to claim 1 , wherein the control circuitry is further configured to:

process the first channel response, the second channel response, or the combined channel response.

9 . The device according to claim 1 , comprising three or more channels.

10 . The device according to claim 1 ,

wherein the control circuitry is further configured to, in a case that in at least one selected from the group consisting of the first channel response and the second channel response, the first peak is not a strongest peak:

define a calibration base window based on an identified strongest peak;

and

iteratively steer over the calibration base window to identify the first peak.

11 . The device according to claim 1 , further comprising:

a receiver configured to receive the first signal and the second signal.

12 . The device according to claim 1 , comprising at least one of the following features:

wherein the first channel response is a first channel impulse response (CIR);

wherein the second channel response is a second CIR;

wherein the first channel response is associated with a first spectrum;

wherein the second channel response is associated with a second spectrum;

wherein the combined channel response is associated with a combined spectrum.

13 . A method of operating a radio frequency (RF) device, the method comprising:

obtaining a first channel response associated with a received first signal at a first channel with a first frequency band;

obtaining a second channel response associated with the received second signal at a second channel with a second frequency band,

wherein the first frequency band and the second frequency band are different; calibrating the first channel response and the second channel response by steering to a calibration base;

wherein calibrating the first channel response and second channel response includes:

identifying a peak from one of a group consisting of the first channel response and the second channel response;

defining a calibration base window based on the identified peak; and

calibrating initial steering coefficients on the peak; and

combining the first channel response with the second channel response for obtaining a combined channel response, wherein combining comprises channel stitching.

14 . The method according to claim 13 ,

wherein the calibration base is associated with a target.

15 . The method of claim 13 further comprising:

applying the combined channel response to determine a spatial characteristic.

16 . The method of claim 13 , further comprising, in case that in at least one of the group consisting of the first channel response and the second channel response, a first peak is not a strongest peak:

identifying the strongest peak;

defining a calibration base window based on an identified strongest peak; and

iteratively steering over the calibration base window to identify the first peak.

17 . The method of claim 13 ,

wherein the first frequency band and the second frequency band have a frequency gap in between.

18 . A radio frequency (RF) device, comprising:

a first channel configured to receive a first signal in a first frequency band;

a second channel configured to receive a second signal in a second frequency band that is different from the first frequency band; and

control circuitry configured to:

obtain a first channel response associated with the first channel using the received first signal;

obtain a second channel response associated with the second channel using the received second signal;

calibrate the first channel response and the second channel response by steering to a calibration base; and

combine the first channel response and second channel response by channel stitching to obtain a combined channel response;

wherein the control circuitry is further configured to:

identify a strongest peak, in one selected from the group consisting of the first channel response and the second channel response;

initially calibrate steering coefficients based on the identified strongest peak;

define a calibration base window based on the identified strongest peak; and

iteratively adjust steering coefficients over the calibration base window to identify a first peak.

19 . The device according to claim 18 , wherein calibration is performed to correct at least:

a constant phase offset; and

a steering phase offset between the first channel response and the second channel response.

20 . The device according to claim 19 , wherein there is a gap between the first frequency band and the second frequency band.