Spatio-temporal coding for wireless communication

On the capacity of OFDM-based spatial multiplexing systems

“…In [13], the capacity of deterministic two-user multiaccess channels with memory is computed. Using a parametric MIMO channel model in which each path is described by an angle of departure, an angle of arrival, a (complex) path gain, and a pathdelay,thecapacityofthecorrespondingdeterministicMIMO delay spread channel (full channel knowledge at the transmitter and the receiver) has been provided in [4]. Using the same parametric channel model and defining the underlying parameters as random variables, a parametric MIMO fading channel model is established in [11], and an expression for the ergodic capacity is provided for the cases where the channel is either known at the receiver only or known at both the transmitter and the receiver.…”

“…Using the same parametric channel model and defining the underlying parameters as random variables, a parametric MIMO fading channel model is established in [11], and an expression for the ergodic capacity is provided for the cases where the channel is either known at the receiver only or known at both the transmitter and the receiver. The channel model used in [4] and [11] does not capture the effects of spatial fading correlation, diffuse scattering, and scattering radius on capacity and is therefore fundamentally different from the MIMO fading channel model used in this paper. Furthermore, in the channel model used in [4] and [11], each path can only be a rank-1 contributor to capacity, 1 whereas in our model the rank depends on physically meaningful parameters such as cluster angle spread and antenna spacing.…”

“…The channel model used in [4] and [11] does not capture the effects of spatial fading correlation, diffuse scattering, and scattering radius on capacity and is therefore fundamentally different from the MIMO fading channel model used in this paper. Furthermore, in the channel model used in [4] and [11], each path can only be a rank-1 contributor to capacity, 1 whereas in our model the rank depends on physically meaningful parameters such as cluster angle spread and antenna spacing. Our MIMO fading channel model is therefore more flexible than the one used in [4] and [11].…”

“…T HE USE OF multiple antennas at both ends of a wireless link has recently been shown to have the potential of achieving extraordinary bit rates [1]- [4]. The corresponding technology is known as spatial multiplexing [1] or BLAST [2], [5] and allows an increase in bit rate in a wireless radio link without additional power or bandwidth consumption.…”

“…based spatial multiplexing systems [4], [11] considering the case where the channel is unknown at the transmitter and perfectly known at the receiver. These expressions are then used to study (analytically and numerically) the influence of propagation parameterssuchasdelayspread,clusteranglespread,andtotalangle spread, and system parameters such as the number of antennas and antenna spacing on capacity.…”