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Hybrid automatic repeat request (HARQ) is a promising link adaptation technique to ensure reliable data transmission in future communication systems. However, it can severely suffer from high distortions, nonlinearities, and interferences caused by the propagation environment. In this paper, we propose an efficient HARQ chase combining (HARQ‐CC) for filter bank multicarrier with offset quadrature...
Compressive Sensing (CS) is a new methodology to reconstruct sparse signals from a few number of measurements. These measurements are captured by a sensing matrix, which has a direct impact on the performance of the reconstruction algorithms. Among the sensing matrices proposed in the literature, Bernoulli and Gaussian random sensing matrices are the most prominent. In this work, we propose to improve...
The demand for more data with an optimal use of spectrum in next generation mobile networks is driving researchers to invent a new physical waveforms, Filter Bank MultiCarrier (FBMC) and Filtered-Orthogonal Frequency Division Multiplexing (F-OFDM) are among the potential modulation schemes for the next generation. In this paper we present a comparative analysis of FBMC scheme after a quick review...
Nowadays, Compressive Sensing (CS), is one of the emerging fields of research in signal processing. It aims at reconstructing a signal from a significantly reduced number of measurements. This is done by exploiting the sparsity property of the original signal. Since its start in 2006, CS has been applied in several domains such as wireless channel estimation, cognitive radio, and other domains. In...
In Compressive Sensing (CS) technique, the original sparse signal is compressed in an adequate manner so as to ease its recovery from a reduced number of measurements. This depends potently on the sensing matrix. In this paper, we consider cluster structured sparse signals, and propose an enhanced Bernoulli sensing matrix. We show that the original data can be efficiently reconstructed by performing...
Higher order quadrature amplitude modulation (HOQAM) is one of the key technologies used in advanced mobile communication systems to achieve high data rates. However, in such systems, performance evaluation can be very complicated and time consuming due to the increase of constellation size. As a solution, a QAM scheme is seen as a combination of two pulse amplitude modulations (PAM). Nevertheless,...
Nowadays, it has become difficult to obtain the expected performance of a digital communication system using the Monte Carlo simulation method. This is due to advanced technologies used in the transmitter and the receiver. In this paper, we propose a new semi-analytical approach for deriving the error probability. It combines the saddle-point approximation and bootstrap technique for estimating the...
Error probability is the most popular metric for evaluating the performance of a digital communication system. It is often estimated using Monte-Carlo simulation method since analytical expressions of the error probabilities are not always available especially for advanced communication systems. In this paper, we propose a new semi-analytical method for fast performance evaluation. This method is...
Analytical performance evaluation of a digital communication system remains a serious problem especially when a sophisticated digital signal processing is considered. Moreover, it is difficult to obtain the expected performance of such system using the Monte Carlo simulation method. In this paper, we propose a new semi-analytical approach for predicting error probability in a digital communication...
Quadrature phase shift keying (QPSK) is one of modulation schemes used in advanced wireless communication systems. It is known to be robust against the channel impairement. However, when it is used with sophisticated signal processing, it makes Monte Carlo simulation method time consumming. In this paper, we propose a semi-analytical prediction method which provides a significant gain in term of computing...
This paper deals with the bit error rate (BER) semi-analytical prediction in a turbo coded digital communication system. We propose a new prediction method which is based on the kernel estimator of the probability density function (pdf). We assume that no knowledge on the distribution of the received soft samples is available. In the proposed method, we derived a new expression of the smoothing parameter...
Transmit power control (TPC) is used in high speed uplink packet access (HSUPA) to compensate for the near far effect which degrades the system performance. However, the use of power control in joint application with turbo coding, and hybrid automatic repeat request (Hybrid-ARQ) is very prohibitive and time consuming. In this paper, we propose a simplified simulation methodology for power controlled...
Transmit power control (TPC) is used in high speed uplink packet access (HSUPA) to compensate for the near far effect which degrades system performance. However, its use in joint application with turbo coding, and hybrid automatic repeat request (Hybrid-ARQ) is very prohibitive and time consuming. In this article, we propose a simplified simulation methodology for power controlled HSUPA with Hybrid-ARQ...
In this paper, we evaluate by computer simulation the performance of the WCDMA enhanced uplink system with cooperative chip-level hybrid ARQ (HARQ) Chase combining technique over a multi-path Raleigh channels. The fixed relaying protocol used is the amplify-and-forward (AF). At each HARQ retransmission, one relay amplifies and forwards it received signal to the destination. At the node B, relay transmissions...
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