Co-channel interference limitations of OFDM communication-radar networks

Abstract

Orthogonal frequency-division multiplexing (OFDM) communication-radar networks are systems where individual nodes use OFDM signals to both communicate and perform radar simultaneously. As a research subject, such networks are fairly new and lack some research covering fundamental limits. In particular, it is unclear how the reliability of the radar component is affected by a network operation, as several nodes might attempt to access the medium at the same time, thereby increasing interference and reducing the radar capabilities of individual nodes. In this paper, we apply the notion of outage (which was originally introduced for communication networks) to radar networks and introduce the outage probability as a performance metric. Using stochastic geometry, we are able to give tight bounds on the outage probability and demonstrate how this is useful for testing OFDM radar parametrizations and algorithms. It is possible to show that the outage probability is smaller than 1% for previously suggested OFDM radar parametrizations without having to resort to empirical methods.

Performance Tradeoffs of Joint Radar-Communication Networks

“…Plugging the expression of F r 1 (x) into (8), θ readily follows (4). Similarly, setting S = θ and solving with respect to the target distance leads to d rm reported in (6). Theorem 1 offers interesting hints in terms of both radar design and performance evaluation, providing compact closedform expressions that relate θ and d rm to the key system parameters.…”

Stochastic Geometry Interference Analysis of Radar Network Performance

“…Recent research has started to address more general configurations. The first results were reported in [6], focusing on OFDM radars. The achievable detection probability for different network densities was investigated, relying on a Gaussian approximation of the aggregate interference.…”

Simulative Prediction of the Interference Potential Between Radars in Common Road Scenarios

“…The simulation methodology presented here can be used to verify and further improve promising analytical approaches like [10] by providing channel data which include deterministic multipath and shielding effects as functions of common measurable traffic parameters such as the flow rate and the velocity.…”