Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Transmit Designs for the MIMO Broadcast Channel with Statistical CSI   We investigate the multiple-input multiple-output broadcast channel with
statistical channel state information available at the transmitter. The
so-called linear assignment operation is employed, and necessary conditions are
derived for the optimal transmit design under general fading conditions. Based
on this, we introduce an iterative algorithm to maximize the linear assignment
weighted sum-rate by applying a gradient descent method. To reduce complexity,
we derive an upper bound of the linear assignment achievable rate of each
receiver, from which a simplified closed-form expression for a near-optimal
linear assignment matrix is derived. This reveals an interesting construction
analogous to that of dirty-paper coding. In light of this, a low complexity
transmission scheme is provided. Numerical examples illustrate the significant
performance of the proposed low complexity scheme.

35
The categories of this paper are: mtrl-th
28
The categories of this paper are: alg-geom
7
The categories of this paper are: hep-th
24
The categories of this paper are: dg-ga
5
The categories of this paper are: gr-qc
6
The categories of this paper are: astro-ph
13
The categories of this paper are: quant-ph
31
The categories of this paper are: ao-sci
11
The categories of this paper are: hep-lat
16
The categories of this paper are: stat
18
The categories of this paper are: econ
30
The categories of this paper are: q-alg
33
The categories of this paper are: plasm-ph
0
The categories of this paper are: hep-ph
27
The categories of this paper are: comp-gas
4
The categories of this paper are: cond-mat