Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Ultra-wideband Concurrent Ranging   We propose a novel concurrent ranging technique for distance estimation with
ultra-wideband (UWB) radios. Conventional schemes assume that the necessary
packet exchanges occur in isolation, to avoid collisions. Concurrent ranging
relies on the overlapping of replies from nearby responders to the same ranging
request issued by an initiator node. As UWB transmissions rely on short pulses,
the individual times of arrival can be discriminated by examining the channel
impulse response (CIR) of the initiator transceiver. By ranging against N
responders with a single, concurrent exchange, our technique drastically abates
network overhead, enabling higher ranging frequency with lower latency and
energy consumption w.r.t. conventional schemes.
  Concurrent ranging can be implemented with a strawman approach requiring
minimal changes to standard schemes. Nevertheless, we empirically show that
this limits the attainable accuracy, reliability, and therefore applicability.
We identify the main challenges in realizing concurrent ranging without
dedicated hardware and tackle them by contributing several techniques, used in
synergy in our prototype based on the popular DW1000 transceiver. Our
evaluation, with static targets and a mobile robot, confirms that concurrent
ranging reliably achieves decimeter-level distance and position accuracy,
comparable to conventional schemes but at a fraction of the network and energy
cost.

30
The categories of this paper are: q-alg
18
The categories of this paper are: econ
35
The categories of this paper are: mtrl-th
0
The categories of this paper are: hep-ph
33
The categories of this paper are: plasm-ph
12
The categories of this paper are: nucl-th
37
The categories of this paper are: supr-con
9
The categories of this paper are: nlin
11
The categories of this paper are: hep-lat
24
The categories of this paper are: dg-ga
13
The categories of this paper are: quant-ph
26
The categories of this paper are: bayes-an
22
The categories of this paper are: chao-dyn
8
The categories of this paper are: hep-ex
2
The categories of this paper are: math
34
The categories of this paper are: chem-ph