Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Semidefinite Relaxation Based Blind Equalization using Constant Modulus
  Criterion   Blind equalization is a classic yet open problem. Statistic-based algorithms,
such as constant modulus (CM), were widely investigated. One inherent issue
with blind algorithms is the phase ambiguity of equalized signals. In this
letter, we propose a novel scheme based on CM criterion and take advantage of
the asymmetric property in a class of LDPC codes to resolve the phase
ambiguity. Specifically, a new formulation with modified CM objective function
and relaxed code constraints is presented.

18
The categories of this paper are: econ
26
The categories of this paper are: bayes-an
15
The categories of this paper are: nucl-ex
35
The categories of this paper are: mtrl-th
13
The categories of this paper are: quant-ph
28
The categories of this paper are: alg-geom
24
The categories of this paper are: dg-ga
6
The categories of this paper are: astro-ph
3
The categories of this paper are: physics
0
The categories of this paper are: hep-ph
32
The categories of this paper are: atom-ph
8
The categories of this paper are: hep-ex
37
The categories of this paper are: supr-con
10
The categories of this paper are: q-bio
20
The categories of this paper are: acc-phys
19
The categories of this paper are: eess