  A large network employing integrated sensing and communication (ISAC) where a
single transmit signal by the base station (BS) serves both the radar and
communication modes is studied. We consider bistatic detection at a passive
radar and monostatic detection at the transmitting BS. The radar-mode
performance is significantly more vulnerable than the communication-mode due to
the double path-loss in the signal component while interferers have direct
links. To combat this, we propose: 1) a novel dynamic transmission strategy
(DTS), 2) joint monostatic and bistation detection via cooperation at the BS.
We analyze the performance of monostatic, bistatic and joint detection. We show
that bistatic detection with dense deployment of low-cost passive radars offers
robustness in detection for farther off targets. Significant improvements in
radar-performance can be attained with joint detection in certain scenarios,
while using one strategy is beneficial in others. Our results highlight that
with DTS we are able to significantly improve quality of radar detection at the
cost of quantity. Further, DTS causes some performance deterioration to the
communication-mode; however, the gains attained for the radar-mode are much
higher. We show that joint detection and DTS together can significantly improve
radar performance from a traditional radar-network.
