Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Low-Speed ADC Sampling Based High-Resolution Compressive Channel
  Estimation   Broadband channel is often characterized by a sparse multipath channel where
dominant multipath taps are widely separated in time, thereby resulting in a
large delay spread. Traditionally, accurate channel estimation is done by
sampling received signal by analog-to-digital converter (ADC) at Nyquist rate
(high-speed ADC sampling) and then estimate all channel taps with
high-resolution. However, traditional linear estimation methods have two mainly
disadvantages: 1) demand of the high-speed ADC sampling rate which already
exceeds the capability of current ADC and also the high-speed ADC is very
expensive for regular wireless communications; 2) neglect the inherent channel
sparsity and the low spectral efficiency wireless communication is unavoidable.
To solve these challenges, in this paper, we propose a high-resolution
compressive channel estimation method by using low-speed ADC sampling. Our
proposed method can achieve close performance comparing with traditional sparse
channel estimation methods. At the same time, the proposed method has following
advantages: 1) reduce communication cost by utilizing cheap low-speed ADC; 2)
improve spectral efficiency by extracting potential training signal resource.
Numerical simulations confirm our proposed method using low-speed ADC sampling.

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The categories of this paper are: nlin
30
The categories of this paper are: q-alg
26
The categories of this paper are: bayes-an
15
The categories of this paper are: nucl-ex
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The categories of this paper are: cond-mat
6
The categories of this paper are: astro-ph
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The categories of this paper are: hep-lat
21
The categories of this paper are: adap-org
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The categories of this paper are: patt-sol
34
The categories of this paper are: chem-ph
29
The categories of this paper are: funct-an
13
The categories of this paper are: quant-ph
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The categories of this paper are: supr-con
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The categories of this paper are: math-ph
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The categories of this paper are: physics
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The categories of this paper are: econ