Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Interference Alignment via Improved Subspace Conditioning   For the K user, single input single output (SISO), frequency selective
interference channel, a new low complexity transmit beamforming design that
improves the achievable sum rate is presented. Jointly employing the
interference alignment (IA) scheme presented by Cadambe and Jafar in [1] and
linear minimum mean square error (MMSE) decoding at the transmitters and
receivers, respectively, the new IA precoding design improves the average sum
rate while preserving the achievable degrees of freedom of the Cadambe and
Jafar scheme, K/2.

17
The categories of this paper are: q-fin
26
The categories of this paper are: bayes-an
27
The categories of this paper are: comp-gas
35
The categories of this paper are: mtrl-th
11
The categories of this paper are: hep-lat
37
The categories of this paper are: supr-con
36
The categories of this paper are: cmp-lg
13
The categories of this paper are: quant-ph
30
The categories of this paper are: q-alg
9
The categories of this paper are: nlin
21
The categories of this paper are: adap-org
4
The categories of this paper are: cond-mat
0
The categories of this paper are: hep-ph
16
The categories of this paper are: stat
28
The categories of this paper are: alg-geom
23
The categories of this paper are: solv-int