Skip to content

Radar Detection

rfsoc_rfdc.dsp.radar_detection

Classes

RadarDetection

Bases: Detection

Child class of Detection to support returning packet indices for radar applications.

Source code in rfsoc_rfdc/dsp/radar_detection.py 
 6
 7
 8
 9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
class RadarDetection(Detection):
    """
    Child class of Detection to support returning packet indices for radar applications.
    """

    def proc_rx(self, wave_rx):
        """
        Detects preamble in the received packet and returns the packet
        along with its absolute start and end indices in the input waveform.
        """
        # Call the parent's proc_rx method to perform the detection logic
        # and store the relevant internal attributes.
        packet_rx, snr, cfo = super().proc_rx(wave_rx)

        # Check if detection was successful
        if packet_rx is None:
            return None, np.nan, np.nan, -1, -1

        # Retrieve the internal attributes stored by the parent proc_rx
        # These attributes (_last_offset_packet, _last_search_len) were added
        # to the parent Detection class specifically for this purpose.
        offset_packet = self._last_offset_packet
        search_len = self._last_search_len

        # Calculate absolute indices based on the original wave_rx length
        # and the search_len (which was the length of wave_rx_search)
        abs_start_index = len(wave_rx) - search_len + offset_packet
        abs_end_index = abs_start_index + self.packet_len

        return packet_rx, snr, cfo, abs_start_index, abs_end_index
Functions
proc_rx(wave_rx)

Detects preamble in the received packet and returns the packet along with its absolute start and end indices in the input waveform.

Source code in rfsoc_rfdc/dsp/radar_detection.py 
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
def proc_rx(self, wave_rx):
    """
    Detects preamble in the received packet and returns the packet
    along with its absolute start and end indices in the input waveform.
    """
    # Call the parent's proc_rx method to perform the detection logic
    # and store the relevant internal attributes.
    packet_rx, snr, cfo = super().proc_rx(wave_rx)

    # Check if detection was successful
    if packet_rx is None:
        return None, np.nan, np.nan, -1, -1

    # Retrieve the internal attributes stored by the parent proc_rx
    # These attributes (_last_offset_packet, _last_search_len) were added
    # to the parent Detection class specifically for this purpose.
    offset_packet = self._last_offset_packet
    search_len = self._last_search_len

    # Calculate absolute indices based on the original wave_rx length
    # and the search_len (which was the length of wave_rx_search)
    abs_start_index = len(wave_rx) - search_len + offset_packet
    abs_end_index = abs_start_index + self.packet_len

    return packet_rx, snr, cfo, abs_start_index, abs_end_index