Abstract: Systems, methods, and computer-readable storage media for generating, transmitting, and utilizing a composite radar and communication waveform are disclosed. The composite radar and communication waveform may facilitate radar detection and data communication operations and may be generated from a frequency modulated (FM) radar waveform and a communication signal. In an aspect, the composite radar and communication waveform may be generated by iteratively executing a shaping process against the FM radar waveform and the communication signal until a first stop criterion is satisfied to produce an initial composite radar and communication waveform having the communication signal embedded therein, and then iteratively executing an enhancement process against the initial composite radar waveform and the communication signal until a second stop criterion is satisfied to produce a final composite radar and communication waveform suitable for both radar detection and data communication operations.

Abstract: Systems, methods, and computer-readable storage media for generating and utilizing radar signals with embedded data are disclosed. Data is encoded onto a CPM waveform, which is then combined with a base radar waveform to produce a radar-embedded communication (REC) waveform. Both the CPM waveform and the base radar waveform may have a continuous phase and constant envelope, resulting in the REC waveform having a continuous phase and constant envelope. The changing (e.g., on a pulse-to-pulse basis) nature of the REC waveform causes RSM of clutter which may result in residual clutter after clutter cancellation, decreasing target detection performance of the radar system. In an aspect, various parameters may be utilized to dynamically adjust the performance of the radar system for a particular operating scenario, such as to enhance radar signal processing or enhance data communication capabilities.

Abstract: Systems, methods, and computer-readable storage media for generating, transmitting, and utilizing a composite radar and communication waveform are disclosed. The composite radar and communication waveform may facilitate radar detection and data communication operations and may be generated from a frequency modulated (FM) radar waveform and a communication signal. In an aspect, the composite radar and communication waveform may be generated by iteratively executing a shaping process against the FM radar waveform and the communication signal until a first stop criterion is satisfied to produce an initial composite radar and communication waveform having the communication signal embedded therein, and then iteratively executing an enhancement process against the initial composite radar waveform and the communication signal until a second stop criterion is satisfied to produce a final composite radar and communication waveform suitable for both radar detection and data communication operations.

Abstract: Multi-symbol non-coherent continuous phase modulation (CPM) detectors having a trellis structure, methods of continuous phase detection using a trellis structure, and trellis-based lock detectors and methods for digitally modulated signals are described. The continuous phase modulation detector includes receiver, observation, memory, and adjustment portions. The receiver has a trellis structure and is adapted for receiving digitally modulated signals having a generally continuous phase. The observation portion is adapted for performing multi-symbol observations on received digitally modulated signals and the memory is adapted for storing historic observation data corresponding to multi-symbol observations performed by the observation portion. The adjustment portion is adapted for selectively adjusting the receiver in accordance with stored historic observation data.

Abstract: A trellis-based lock detector and method for digitally modulated signals are presented. A global survivor for consecutive time indexes is computed as a maximum cumulative branch metric corresponding to a given time index for consecutive branches of the trellis structure. The invention is based on a concept that for a noise signal entering the lock detector, in contrast to an informative signal, the probability of a long succession of true evaluations of a global survivor is very small. The latter allows for using data, representative of the number of consecutive true conditions for a global survivor over an averaging time, as an informative parameter for making a decision on the status of lock detection.

Abstract: Multi-symbol non-coherent continuous phase modulation (CPM) detectors having a trellis structure, methods of continuous phase detection using a trellis structure, and trellis-based lock detectors and methods for digitally modulated signals are described. The continuous phase modulation detector includes receiver, observation, memory, and adjustment portions. The receiver has a trellis structure and is adapted for receiving digitally modulated signals having a generally continuous phase. The observation portion is adapted for performing multi-symbol observations on received digitally modulated signals and the memory is adapted for storing historic observation data corresponding to multi-symbol observations performed by the observation portion. The adjustment portion is adapted for selectively adjusting the receiver in accordance with stored historic observation data.