Wireless mediums, such as RF, optical, or acoustical, provide finite resources for the purposes of remote sensing (such radar) and data communications. Often, these two functions are at odds with one another compete resources. Applications wireless technology growing rapidly, RF convergence is already presenting itself a requirement both users consumer military system requirements evolve. The broad solution space to this complex problem encompasses cooperation codesigning systems...

In this paper, we introduce a radar information metric, the estimation rate, that allows user to be considered in multiple-access channel enabling performance bounds for joint radar-communications coexistence derived. Traditionally, two systems were isolated one or multiple dimensions. We categorize new attempts at spectrum-space-time convergence as either coexistence, cooperation, co-design. The meaning and interpretation of rate what it means alter are discussed. Additionally, elaborate on...

We investigate methods of co-existence between radar and communications systems. Each system typically considers the other a source interference. Consequently, traditional solution is to isolate two systems spectrally or spatially. By considering cooperative signaling scheme, we derive achievable bounds on performance for receiver that observes return in same frequency allocation. assume operations be single joint system. Bounds are measured terms data information rate novel estimation radar.

We develop a joint radar and communications performance bound by optimizing waveforms jointly for the simultaneous return receiver. that maximize estimation rate data shared spectrum. As an extension to our previous efforts, we consider parametrically defined spectral weighting of waveform, balancing potential increase in entropy due range sidelobes with improvement main lobe performance. Successive interference cancellation is used mitigate in-band user signal after predicted removed. The...

We develop and present a novel minimum estimation error variance waveform design method. The method optimizes the spectral shape of unimodular radar such that performance joint radar-communications system shares spectrum is maximized. also water-filling successive interference cancelation data rate, which employs continuous algorithm to obtain optimal communications power spectrum. perform numerical study compare new technique with previously derived mask shaping global rate capture...

Microwave radar technology is very attractive for ubiquitous short-range health monitoring due to its non-contact, see-through, privacy-preserving and safe features compared the competing remote technologies such as optics. The possibility of radar-based approaches breathing cardiac sensing was demonstrated a few decades ago. However, investigation regarding robustness vital-sign (VSM) not available in current literature. In this paper, we aim close gap by presenting an extensive...

We investigate methods of co-existence between radar and communications systems. Since historically each system views the other as a source interference, systems are traditionally isolated spectrally or spatially in order to prevent performance degradation. By considering cooperative signaling scheme, we derive achievable bounds on for receiver that observes return same frequency allocation. These inner will be derived scenarios where has perform target parameter estimation multiple targets....

We model the effects of phase noise on clutter cancellation and study overall impact it has radar estimation rate. Cooperative bounds involving for additional communications access are impacted by complicating model. assume is static with small intrinsic motion (ICM). Treating residual due to as an source, rate negatively impacted. This further degrades channel, affecting data well. also relationship between range scatterer.

We analyze the performance of a joint radar-communications receiver performing target detection while simultaneously decoding message from an in-band communications user. assume that there is clutter in environment and performs basic mitigation. Inner bounds on are then formulated. Bounds system measured terms data information rate for area under operating characteristic (ROC) curve radar.

We analyze the effects of clutter on inner bounds for performance a joint radar-communications system. Radar returns from are often characterized by randomly fluctuating cross section. Hence, statistical methods must be employed to model and its cross-section. In this paper we consider two models their effect Bounds system measured in terms data information rate communications, radar estimation radar.

In this paper, we investigate the joint multiple-input multiple-output (MIMO) radar and communications system convergence problem develop a radar-communications performance bound using concept of estimation rate for data information system. At receiver, propose Successive Interference Cancellation (SIC) strategy to estimate parameters decode signal simultaneously. While, at MIMO transmitter, spectrum sharing scheme show that optimal can be achieved through spectral spatial waterfilling...

The growing population of radar and communications systems poses a challenge to spectral coexistence. In this preliminary study, we investigate the utility reinforcement learning in facilitating cooperative We also highlight subtleties challenges associated with employing context. simulate small joint radar-communications network whose members communicate while tracking moving target's range. A management system must learn how distribute allotted bandwidth jointly maximize performance....

We investigate joint radar-communications convergence for a multiple-antenna system and develop sharing schemes in spatial domain. In this paper, we in-band radar communications model provide set of multiple-access performance bounds, which can be used as design tool based on parameterization performance. Spatial domain approaches are proposed, the resulting bounds compared analysed. Throughout formulation these consider range angle target parameters interest. utilize estimation rate data...

With rapid advances in flexible, software-defined computational architectures and radio front-end technologies, we have an opportunity to improve the efficiency of spectral use, reinforce system reliability, enable new capabilities. We deprecate traditional "stove-piped" approach towards management favor networks RF, mmWave, terahertz systems that jointly execute multiple functions, including communications; radar; positioning, navigation, timing (PNT); situational awareness; opportunistic...

One solution to addressing the spectral congestion problem is co-design communications and remote sensing systems cooperate, such that each system benefits from presence of one another. In this work, we present a novel joint multiple access architecture allows for simultaneous decoding information radar target tracking parameter estimation within same space, time, frequency continuum. We demonstrate feasibility by implementing it on network software defined radios (SDRs). To characterize...

In this paper, we present a new observation when processing backscattered radar signals from sleeping subject on normal mattress. A breathing motion magnification effect is observed because of mattress surface displacement due to human respiratory activity. This undesirable artifact causes existing methods for accurate heart-rate estimation fail. We therefore propose novel active cancellation technique deal with problem by intelligently selecting slow-time series multiple ranges and...

Modern RF environments are becoming increasingly congested. This limits the opportunities and capabilities of modern systems, obstructing development proliferation new technologies. Novel vehicular technologies promise a era transportation capabilities, but legacy design techniques cannot adapt to current spectral congestion. We summarize recent Convergence results discuss how they mitigate congestion in applications. propose joint radar, communications, positioning, navigation, timing...

Emerging applications such as autonomous vehicles and urban air mobility (UAM) rely on radar, communications, positioning, navigation, timing (PNT) capabilities, all of which compete for limited spectral resources. In-band, full-duplex (IBFD) systems promise better efficiency but also introduce significant self-interference. In this paper, we discuss a combination self-interference cancellation approaches IBFD, joint radar-communications in the context automated mobility. We propose simulate...

In this article, we develop a new waveform codesign approach for radar–communications spectral coexistence using decision-theoretic framework called <italic xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">partially observable Markov decision process</i> (POMDP). The POMDP framework's natural look-ahead feature allows us to trade off short-term long-term performance, which is necessary in problems with competing objectives and dynamic user needs. As...

We derive bounds on mutual information for arbitrary estimation problems in additive noise, modeled using Gaussian mixtures. Previous work exploiting the I-minimum-mean-squared-error (MMSE) formula to formulate a bridge between MMSE mixture model and are generalized allow noise modeling. A novel upper bound is also developed general case. In addition, limits analyzed develop entropy, asymptotic behavior of all bounds, errors with some results bridged back domain.

We develop and present a radar waveform design method that optimizes the spectral shape of so joint performance cooperative communications system is maximized. The continuous water-filling (WF) spectral-mask shaping presented in this paper based on previously derived technique. However, modified to utilize algorithm improve performance. also introduce additional practical constraints autocorrelation peak side-lobe-to-main-lobe ratio leakage. Finally, we perform numerical study compare WF...

In this paper, we develop a decision theoretic approach for radar waveform design to maximize the joint communications performance in spectral coexistence. Specifically, an adaptive by posing problem as partially observable Markov process (POMDP), which leads hard optimization problem. We extend approximate dynamic programming called nominal belief-state solve perform numerical study compare of proposed POMDP with commonly used myopic approaches.

In-band, full-duplex (IBFD) radio frequency (RF) users generate self-interference that obstructs receiver operations. This interference may be mitigated using several techniques, including antenna isolation, circulators, digital mitigation, and analog mitigation at the carrier frequency. We apply an technique uses a sparse tap-delay model to reduce power computational complexity. demonstrate optimizing weights of resulting equalizer achieves sufficient even under realistic hardware...

The increasing demand for cost-efficient yet reliable swarms of multi-function unmanned aerial systems (UASs) has tremendous potential in both military and civilian applications. Advancements ISACs research, such as RF Convergence exclusively provide a promising path toward implementing UASs, often limited by insufficient front-end capabilities the network scales up. Because interconnection bandwidth computational complexity required to process data among nodes using centralized...