文档介绍：Transmit Gain Optimization for Space Time Block Coding Wireless Systems
with Co-channel Interference
Nevio Benvenuto and Stefano Tomasin
Dipartimento di Elettronica e Informatica, Universita` di Padova
Via G. Gradenigo 6A - 35131, Padova (Italy)
Tel: ++39-0498277654, Fax: ++39-0498277699
E-mail: {nb, tomasin}***@
ABSTRACT Flex project [8]. In works the devices a-
nized into synchronous s which can potentially in-
bination of Orthogonal Frequency Division
terfere with each other and thus limit considerably -
Multiplexing and space-time block coding is a promising
work throughput.
technique for wireless broadband transmission. In a sce-
STBC OFDM
nario where other devices generate interference, we pro- In a system, according to the particular
pose a scheme where the transmit gains of each OFDM condition of both the channel and the interfering signals,
subchannel are adaptively chosen. As a design criteria adaptation of the antenna gains could be done for each of
OFDM
we consider both the minimization of the interference and the subcarriers. However, a fully optimized sys-
maximization of the signal to interference plus noise ra- tem turns out to be plex, hence we fo-
tio at the detection point. As a particular case we con- cus our investigation only on the transmit gain adaptation.
sider also the situation of varying only the amplitude