Advanced Signal Processing Algorithms for Wireless Communications

Adaptive Blind Multiuser Detection over Flat Fast Fading Channels Using Particle Filtering

We propose a method for blind multiuser detection (MUD) in synchronous systems over flat and fast Rayleigh fading channels. We adopt an autoregressive-moving-average (ARMA) process to model the temporal correl...

Authors: Yufei Huang, Jianqiu (Michelle) Zhang, Isabel Tienda Luna, Petar M Djurić and Diego Pablo Ruiz Padillo

Impact of Channel Estimation Errors on Multiuser Detection via the Replica Method

For practical wireless DS-CDMA systems, channel estimation is imperfect due to noise and interference. In this paper, the impact of channel estimation errors on multiuser detection (MUD) is analyzed under the ...

Authors: Husheng Li and H Vincent Poor

Blind Decoding of Multiple Description Codes over OFDM Systems via Sequential Monte Carlo

We consider the problem of transmitting a continuous source through an OFDM system. Multiple description scalar quantization (MDSQ) is applied to the source signal, resulting in two correlated source descripti...

Authors: Zigang Yang, Dong Guo and Xiaodong Wang

Adaptive Iterative Soft-Input Soft-Output Parallel Decision-Feedback Detectors for Asynchronous Coded DS-CDMA Systems

The optimum and many suboptimum iterative soft-input soft-output (SISO) multiuser detectors require a priori information about the multiuser system, such as the users' transmitted signature waveforms, relative...

Authors: Wei Zhang, Claude D'Amours and Abbas Yongaçoğlu

Factor-Graph-Based Soft Self-Iterative Equalizer for Multipath Channels

We consider factor-graph-based soft self-iterative equalization in wireless multipath channels. Since factor graphs are able to characterize multipath channels to per-path level, the corresponding soft self-it...

Authors: Ben Lu, Guosen Yue, Xiaodong Wang and Mohammad Madihian

Editorial

Authors: Erdal Panayırcı, Costas Georghiades, Xiaodong Wang and Hakan A Çırpan

Blind Multiuser Detection for Long-Code CDMA Systems with Transmission-Induced Cyclostationarity

We consider blind channel identification and signal separation in long-code CDMA systems. First, by modeling the received signals as cyclostationary processes with modulation-induced cyclostationarity, long-co...

Authors: Tongtong Li, Weiguo Liang, Zhi Ding and Jitendra K Tugnait

Estimation of Directions of Arrival by Matching Pursuit (EDAMP)

We propose a novel system architecture that employs a matching pursuit-based basis selection algorithm for directions of arrival estimation. The proposed system does not require a priori knowledge of the numbe...

Authors: GüneşZ Karabulut, Tolga Kurt and Abbas Yongaçoglu

A Theoretical Framework for Soft-Information-Based Synchronization in Iterative (Turbo) Receivers

This contribution considers turbo synchronization, that is to say, the use of soft data information to estimate parameters like carrier phase, frequency, or timing offsets of a modulated signal within an itera...

Authors: Nele Noels, Vincenzo Lottici, Antoine Dejonghe, Heidi Steendam, Marc Moeneclaey, Marco Luise and Luc Vandendorpe

Adaptive Space-Time-Spreading-Assisted Wideband CDMA Systems Communicating over Dispersive Nakagami- Fading Channels

In this contribution, the performance of wideband code-division multiple-access (W-CDMA) systems using space-time-spreading- (STS-) based transmit diversity is investigated, when frequency-selective Nakagami-

Authors: Lie-Liang Yang and Lajos Hanzo

The Extended-Window Channel Estimator for Iterative Channel-and-Symbol Estimation

The application of the expectation-maximization (EM) algorithm to channel estimation results in a well-known iterative channel-and-symbol estimator (ICSE). The EM-ICSE iterates between a symbol estimator based...

Authors: Renato R Lopes and John R Barry

Soft-In Soft-Output Detection in the Presence of Parametric Uncertainty via the Bayesian EM Algorithm

We investigate the application of the Bayesian expectation-maximization (BEM) technique to the design of soft-in soft-out (SISO) detection algorithms for wireless communication systems operating over channels aff...

Authors: AS Gallo and GM Vitetta

A Low-Complexity KL Expansion-Based Channel Estimator for OFDM Systems

This paper first proposes a computationally efficient, pilot-aided linear minimum mean square error (MMSE) batch channel estimation algorithm for OFDM systems in unknown wireless fading channels. The proposed ...

Authors: Habib Şenol, Hakan A Çırpan and Erdal Panayırcı

A Receiver for Differential Space-Time -Shifted BPSK Modulation Based on Scalar-MSDD and the EM Algorithm

In this paper, we consider the issue of blind detection of Alamouti-type differential space-time (ST) modulation in static Rayleigh fading channels. We focus our attention on a ...

Authors: Michael LB Riediger, Paul KM Ho and Jae H Kim

Opportunistic Carrier Sensing for Energy-Efficient Information Retrieval in Sensor Networks

We consider distributed information retrieval for sensor networks with cluster heads or mobile access points. The performance metric used in the design is energy efficiency defined as the ratio of the average ...

Authors: Qing Zhao and Lang Tong