UWB Noise-OFDM Netted Radar: Physical Layer Design and Analysis

Surender, Shrawan C.; Narayanan, Ram M.

doi:10.1109/taes.2011.5751265

Cited by 46 publications

(38 citation statements)

References 36 publications

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“…The model described by Equation (4) agrees with experimental simulations, as shown in [7]. We mention it here since it validates the multi-user BER versus SNR experimental simulations presented in Section 8.…”

Section: Noise-embedded-communications Performancesupporting

confidence: 81%

“…Thus, the composite transmit waveform is designed to simultaneously support far-field target-sensing and data communications, while possessing covertness and interference rejection properties owing to the transmission of a noise-like signal. This single-radio multi-channel wireless radar-communications system is what we call the UWB noise-OFDM radar [7]. Multiple such radars can then form an ad hoc communication network to provide significant benefits in target detection and recognition, by taking advantage of multi-aspect and multi-look fusion techniques [8,9], and information dissemination through opportunistic routing [10].…”

Section: Figure 1 First-emergency Hostage Rescue Operational Scenariomentioning

confidence: 99%

“…The above OFDM signal is inserted within the notched band-limited noise signal, with appropriate power equalization and an ideal mixer, to produce the multi-functional noise-OFDM radar transmit waveform, which is propagated by an omni-directional transmit antenna. As seen by any unintended receiver, the transmitted composite waveform clearly appears random and noise-like [7], preserving its covertness properties and hence presenting physical layer security. However, for other friendly radar sensors in the transmitting radar's vicinity, the waveform is construed as data plus noise.…”

Section: Transmit Subsystemmentioning

confidence: 99%

“…The SNR at the input of the receiving antenna is defined as the ratio of the transmitted noise-OFDM signal to the band-pass undesired channel noise received by the antenna. The general BER of the noise-OFDM radar's communication subsystem has been derived to be [7] …”

Section: Noise-embedded-communications Performancementioning

confidence: 99%

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Cross-layered resource allocation in UWB noise-OFDM-based ad hoc surveillance networks

Surender

Narayanan

Das

2013

J Wireless Com Network

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Situational awareness in military surveillance and emergency responder scenarios requires detection of long range targets and secure communication of this information across a multi-sensor network. A potential approach towards this requirement is to harness the coexisting advantages of radar sensing and wireless communications. A multifunctional communications-embedded radar design that implicitly develops into a cross-layered multi-radar secure wireless ad hoc network is proposed to address this need. First, we demonstrate radar and communications coexistence through analysis of our novel composite orthogonal frequency division multiplexing (OFDM)-embedded ultra wideband (UWB) noise waveform's bit error rate and ambiguity function formulations. Second, to solve the medium access problem of allocating the multiple OFDM frequencies between different ad hoc radars nodes, we propose a simple yet fully distributed, channel-diversity-aided algorithm. It constructs a contention-free network, scaling logarithmically with the number of radar nodes, and analytically guarantees a provable fraction of the maximum throughput achieved by any optimal centralized allocation algorithm. Furthermore, our solution dynamically adapts with channel variations and topology changes. Working in-sync with the UWB noise-based single radio multi-channel wireless platform, this distributed resource allocation builds a synergistic cross-layered ad hoc network of radars.

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Section: Noise-embedded-communications Performancesupporting

confidence: 81%

Section: Figure 1 First-emergency Hostage Rescue Operational Scenariomentioning

confidence: 99%

Section: Transmit Subsystemmentioning

confidence: 99%

Section: Noise-embedded-communications Performancementioning

confidence: 99%

See 2 more Smart Citations

Cross-layered resource allocation in UWB noise-OFDM-based ad hoc surveillance networks

Surender

Narayanan

Das

2013

J Wireless Com Network

View full text Add to dashboard Cite

show abstract

“…Other applications for UWB radar systems, which require or benefit from the detection and classification capabilities, are for example localization and tracking [6] or through-wall surveillance [4]. The physical layer design for an integrated UWB radar network that utilizes OFDM technology was analyzed in [11]. In [2] the case of object detection is considered, where for the problem of power allocation an approach based on the maximization of the Kullback-Leibler distance is used.…”

Section: Introductionmentioning

confidence: 99%