Gaussian multiple access channels for radar and communications spectrum sharing

Spectrum Sharing Radar: Coexistence via Xampling

“…We now turn to the radar receiver design and describe how a delay-Doppler map can be recovered from only N b transmitted narrow bands. The radar receiver first filters the transmitted bands supported on F R given by (12) and computes the Fourier coefficients of the received signal.…”

“…The frequency support F R of x R (t), given by (12), is known at the comm receiver. From F R , we derive the support S R of the radar slices x R (f ), which is identical to the support of U R , such that…”

“…"CommRad" [9]) attempt to improve performance metrics like the error vector magnitude (EVM) and bit/symbol error rate (BER/SER) for interference from radar [10]. With the introduction of the SSPARC program, joint radar-comm performance is being investigated [11][12][13], with extensions to MIMO radar-comm [14]. In nearly all cases, real-time exchange of information between radar and comm hardware has not yet been integrated into the system architectures.…”

A high-level overview of fundamental limits studies for the DARPA SSPARC program

“…GTRI has examined the problem from a different perspective, focusing on the radar as an encoder of information in an interference-limited environment [4]. Initial performance tradeoffs relied on using special types of hybrid waveforms.…”

The Constant Information Radar

“…Some researchers have defined radar information to develop joint radar-communications information bounds [39,40], but neither consider tracking information or modulate spectral access based on radar information. Others have jointly maximized the information criterion for radar and communications users to minimize mutual interference by varying radar waveform and communications OFDM parameters in response to dynamic bandwidth allocation [41].…”