Waveform configuration for the AWR2188 includes the following steps:

• Profile configuration: Includes basic parameter configuration. Each chirp must have a specific profile, which is stored in the specific profile RAM.
• Chirp parameter LUTs: Tunable chirp parameters are defined as a look-up table (LUT), which is stored in the specific chirp RAM.
• Subframe configuration: Includes chirp number, burst, and timing information, and chirp LUT configuration associated with the subframe, including the parameters that must use the chirp LUT, and the address, size, and look-up table approach of each parameter in the chirp LUT. Like chirp parameter LUTs, the subframe configuration is also stored in the chirp RAM.
• Frame configuration: Includes parameters such as the start address in the chirp RAM, subframe number, and so forth for subframes to be used in the frame.

Figure 3-1 below shows the storage locations and associations of each configuration in the RAM.

As shown in Figure 3-1, for the waveform generation of each frame, first locate the frame configuration; then locate the corresponding subframe configuration in the chirp RAM based on the h_SubFrameLutOffset setting in the frame configuration; and finally index the profile and TxEnable configurations in the chirp RAM according to the defined chirp LUT configuration to generate the corresponding chirps.

For the AWR2188 waveform configuration, the basic API configuration flow is shown in Figure 3-2 below. The chirp parameter LUTs provide great flexibility for the generation of different waveforms.

The following is a detailed description of frame, subframe, chirp parameter LUT, and profile. See also Reference^[5] for detailed configuration parameter structures and APIs.