We make two contributions to the field of FDD transmit processing for multi-user MISO systems: first the concept of covariance based linear precoding is extended to spatio-temporal channels with full rank covariance matrices. Within, the variance true approximation of all signal components allows the formulation of the receive signal exclusively basing upon covariance knowledge and thus the der...

Orthogonal Frequency Division Multiplexing (OFDM) is a very attractive technique for high data rate transmission in wireless and wired applications. However, implementation of the OFDM system entails several difficulties. One of the major drawbacks is the high peak to average power ratio (PAPR) of the transmitted signals. Several approaches exist to reduce PAPR of OFDM symbols. Precoding is a n...

InMulti User Multiple Input Single Output (MU-MISO) systems one centralized transmitter with multiple antennas serves several decentralized single-antenna receivers. Precoding is an attractive way to remove multiuser interferences because it reduces cost and power consumption in the user equipment. When implementing precoding, however, the base station should know the Channel State Information ...

It is known that precoding a signal prior to its transmission through an unknown finite impulse response channel facilitates the equalisation of the channel. Moreover, since linear precoders spread the spectrum, the equalisation process mitigates the effects of channel spectral nulls caused by frequency selective fading. This paper argues that certain affine precoders are more efficient than li...

In this paper we consider massive MIMO Multi-cell TDD systems. In order to eliminate the effect of pilot contamination, a new scheme is proposed. In the same cell all transmitted signals from base station or user are multiplied same precoding sequences. The precoding sequences are orthogonal for different cell. The received signals at base station or terminals are multiplied the conjugate trans...

Multiple input multiple output (MIMO) systems using multiple transmit and receive antennas are widely recognized as the vital breakthrough that will allow future wireless systems to achieve higher data rates with limited bandwidth and power resources. The capacity of MIMO systems depends strongly on whether the channel state information (CSI) is available at the transmitter or not. The main aim...

Precoding, i.e., nonlinear pre-equalization, at the transmitter side has been proved to be a very efficient strategy for channel equalization in single-carrier digital transmission schemes. It enables the application of coded modulation in a seamless fashion. A drawback of precoding is that the signal at the input of the decision device exhibits a huge dynamic range. Based on dynamics shaping, ...

 A nonlinear transmitter-based multiple access interference (MAI) cancellation technique, Tomlinson-Harashima transmitter precoding (THP), is proposed for Direct Sequence (DS) Code-Division Multiple Access (CDMA) systems with or without multipath fading. This zero forcing (ZF)-based transmitter precoding method minimizes the mean square error at the receiver. It is suitable for the downlink si...

MIMO COMMUNICATION CAPACITY: ANTENNA COUPLING AND PRECODING FOR INCOHERENT DETECTION

Visible light communication (VLC) transmission system, combined with lighting and communication, has a great application value in the field of intelligent transportation. To efficiently improve performance VLC-based transportation an improved precoding scheme is proposed experimentally verified. Partial data-carrying subcarrier (PDS)-precoding can balance signal-to-noise ratio (SNR) combat freq...