Because of the large numbers of feedback in the multiple input & multiple output (MIMO) multi-carrier system, the precoding based on full channel state information is difficult to be applied in practical. In order to significantly reduce the overhead of the feedback link, a compressed sensing precoding method with limited feedback in MIMO multi-carrier system is proposed in this paper. First, t...

In this thesis, a single carrier ATSC DTV baseband transmitter, part of the receiver (including channel estimator and channel equalizer), were modeled. Since multi-path induced ISI (inter symbol interference) is the most significant impact on the performance of single carrier DTV reception, modeling and implementation of single carrier channel estimator and channel equalizer have been the focus...

In this paper, we investigate channel estimation techniques for wireless receivers. Channel estimation is important for wireless applications because a wireless channel has fading characteristics and time varying impulse response. OFDM is a multi-carrier modulation technique wherein we use a set of orthogonal sub-carriers. OFDM divides the entire frequency band into several sub bands. The sub-c...

The paper extends the recently proposed concept of finite dimensional robust 2-D MMSE channel estimation to the staggered pilot grids in multi-carrier systems. The proposed scheme is particularly useful once the receiver has no knowledge of the channel correlation function and it intends to pursue the MMSE channel estimation for improved performance. We build a minimax optimization setup, as a ...

This paper deals with the optimization and the performances evaluation of multi carrier transmissions on indoor power lines, using semi-blind channel estimation. Various transmission schemes are proposed to mitigate the effects of the stationary noise, the channel selectivity and the sudden change of the channel transfer function. These different techniques are optimized for a transmission on a...

We propose an iterative receiver for a multi-carrier (MC) code division multiple access (CDMA) system in the uplink for users moving at vehicular speed. MC-CDMA is based on orthogonal frequency division multiplexing (OFDM), thus time-variant channel estimation can be performed for every subcarrier independently. The variation of a subcarrier over the duration of a data block is upper bounded by...

OFDM/OQAM is a special type of multi-carrier modulation that can be considered as an alternative to conventional OFDM with cyclic prefix (CP) for transmission over multipath fading channels. Indeed, as it requires no guard interval, it has the advantage of a theoretically higher spectral efficiency. Furthermore if the pulse shape is well-localized in frequency, the resulting OFDM/OQAM signal sa...

The purpose of this paper is to quantify the effects of Carrier Frequency Offset (CFO), Symbol Timing Offset (STO) and Phase Noise in coded Orthogonal Frequency Division Multiplexing (OFDM) and coded Single Carrier Frequency Domain Equalization (SC-FDE) systems and to compare their relative sensitivities in wide-band HF channel model. In mobile communication systems where multi-path propagation...