Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Joint DOA and Frequency Estimation with Sub-Nyquist Sampling for More
  Sources than Sensors   In this letter, we apply previous array receiver architecture which employs
time-domain sub-Nyquist sampling techniques to jointly estimate frequency and
direction-of-arrival(DOA) of narrowband far-field signals. Herein, a more
general situation is taken into consideration, where there may be more than one
signal in a subband. We build time-space union model, analyze the
identification of the model, and give the maximum signal number which can be
classified. We also proof that the Cramer-Rao Bound (CRB) is lower than that of
which employs Nyquist sampling. Simulation results verify the capacity to
estimate the number of sources. Meanwhile, simulations show that our estimation
performance closely matches the CRB and is superior for more sources than
sensors, especially when the minimum redundancy array (MRA) is employed.

25
The categories of this paper are: patt-sol
3
The categories of this paper are: physics
37
The categories of this paper are: supr-con
30
The categories of this paper are: q-alg
36
The categories of this paper are: cmp-lg
14
The categories of this paper are: math-ph
24
The categories of this paper are: dg-ga
0
The categories of this paper are: hep-ph
20
The categories of this paper are: acc-phys
10
The categories of this paper are: q-bio
29
The categories of this paper are: funct-an
9
The categories of this paper are: nlin
26
The categories of this paper are: bayes-an
8
The categories of this paper are: hep-ex
22
The categories of this paper are: chao-dyn
23
The categories of this paper are: solv-int