In this paper, a new method has been proposed to eliminate the intersymbol interference (ISI) and interchannel interference (ICI) for discrete multitone/orthogonal frequency division multiplexing (DMT/OFDM) systems by considering Time to Live (TTL) of multipath channel fading, especially for wireless medical application. In this method, the existence time of the packet is considered as the maxi...

The problem of blind demodulation of multiuser information symbols in a high-rate code-division multiple-access (CDMA) network in the presence of both multiple-access interference (MAI) and intersymbol interference (ISI) is considered. The dispersive CDMA channel is first cast into a multipleinput multiple-output (MIMO) signal model framework. By applying the theory of blind MIMO channel identi...

We consider cooperative space-frequency block-coded OFDM (SFBC-OFDM) networks with amplify-and-forward (AF) and decode-and-forward (DF) protocols at the relays. In cooperative SFBC-OFDM networks that employ DF protocol, (i), intersymbol interference (ISI) occurs at the destination due to violation of the “quasistatic” assumption because of the frequency selectivity of the relay-to-destination c...

Timing synchronization (TS) is vital for orthogonal frequency division multiplexing (OFDM) systems, which makes the discrete Fourier transform (DFT) window start at intersymbol-interference (ISI)-free region. However, multi-path uncertainty in wireless communication scenarios degrades TS correctness. To alleviate this degradation, we propose a learning-based method enhanced by improving design ...

Space-Time Codes represent a key technology for future broadband wireless communication systems. In this paper a class of space-time block codes according to [1] is used which can lead to intersymbol interference (ISI) due to an optimized diversity performance. Therefore ISI compensation is an important task of the decoding process of these codes. Several known ISI compensation methods can be a...

The improved convergence speed and tracking properties of fractionally-spaced equalizers are analyzed. We consider in particular the effect of a frequency offset between the transmitter baud rate and the receiver sampling clock that induces important time-variations. We show that a fractionallyspaced equalizer can handle the intersymbol interferences (ISI) induced when the propagation channel d...

In the communication field, during transmission, a source signal undergoes a convolutive distortion between its symbols and the channel impulse response. This distortion is referred to as Intersymbol Interference (ISI) and can be reduced significantly by applying a blind adaptive deconvolution process (blind adaptive equalizer) on the distorted received symbols. But, since the entire blind deco...

1 The paper proposes a Constrained Least Square (CLS) pre-distortion scheme for multiple-input 2 single-output (MISO) multiple access ultra-wideband (UWB) systems. In such a scheme, a simple 3 objective function is defined, which can be efficiently solved by a gradient based algorithm. For the 4 performance evaluation, scenarios CM1 and CM3 of the IEEE 802.15.3a channel model are considered. 5 ...

Space-time block codes based on orthogonal designs, known as space-time orthogonal block (STOB) codes, have recently been proposed. It has been noted that when the number of transmit antennas is more than two, full-rate STOB codes could only be designed for real-valued data symbols. Real-valued symbols form pulse amplitude modulated (PAM) sequences whose bandwidth efficient transmission is only...