Showing papers in "Physical Communication in 2010"

TL;DR: The main technologies for LTE-Advanced are explained, together with possible improvements, their associated challenges, and some approaches that have been considered to tackle those challenges.

TL;DR: It is shown that analog wavelet transform is successfully implemented in biomedical signal processing for design of low-power pacemakers and also in ultra-wideband (UWB) wireless communications.

TL;DR: In this article, an advanced channel model is derived to characterize the underground wireless channel and the foundational issues for efficient communication through soil are discussed, in particular, the underground communication channel is modeled considering not only the propagation of EM waves in soil, but also other effects such as multipath, soil composition, soil moisture, and burial depth.

TL;DR: A new frequency-domain channel estimation and equalization (FDE) scheme, combined with a new group-wise phase correction scheme, is proposed for single-carrier (SC) underwater acoustic communications systems employing single transducer and multiple hydrophones.

TL;DR: This work considers an unsupervised network operating on a frequency-flat Gaussian channel, where K + 1 nodes associate their identities to nonorthogonal signatures, transmitted at random times, synchronously, and independently.

TL;DR: The results from this research provide insightful information on the performance of various direction finding algorithms as a function of complex reflecting environment, transmitter height, receiving antenna array location, number of receiving antenna elements and pass rate acceptance criteria.

TL;DR: This paper presents a comprehensive analysis of superposition coded modulation (SCM), i.e., the single- code SCM (SC-SCM) and multi-code SCM

TL;DR: Exploration of performance shows that the proposed collaborative communication system mitigates the fading, hence, significant power gain and significant reduction in BER can be achieved in the presence of phase errors, AWGN and Rayleigh fading.

TL;DR: A novel approach that uses features of the SCA and its enabling technologies to achieve rapid dynamic reconfiguration of SDRs is presented, and the act of radio reconfigured through SCA application management is found to momentarily decrease the radio throughput.

TL;DR: Application of the EM-based algorithm to the problem of iterative data detection and channel estimation leads to a receiver structure that also incorporates a partial interference cancelation and computer simulations show that the proposed algorithms have excellent BER end estimation performance.

TL;DR: A scheme in which the cooperation is triggered only if the source-destination channel is of an unacceptable quality and the destination selects one relay out of a decoding set of relays for cooperation is considered.

TL;DR: A performance analysis of user scheduling schemes forMultiuser MIMO systems exploiting the multiuser and antenna diversities over Nakagami-m fading channels is presented.

TL;DR: A new coupled PHY and MAC scheduling methodology is addressed by investigating the relationship between the Burst length and its Goodput in different Modulation/Coding schemes, and investigating, given a Burst, the most efficient such scheme.

TL;DR: The proposed cognitive CSMA/CA MAC protocol can allow an ad hoc network to coexist with the legacy TDMA system and can improve the system throughput by 50% through analysis and NS-2 simulations, while keeping the dropping rate lower than 2% for delay-sensitive traffic.

TL;DR: An analytical framework to evaluate the exact bit error rate (BER) performance of a high data rate Ultra-Wideband Differential Transmitted-Reference (UWB-DTR) system over a perfect IEEE 802.15.3a Channel Model 1 (CM1) is developed and log-normal fading is considered, which is an essential characteristic of CM1, for the first time.

TL;DR: This paper presents a performance analysis of a user scheduling scheme for multiuser multiple-input-multiple-output (MIMO) systems with maximum ratio combining (MRC) and transmit antenna selection exploiting theMultiuser and antenna diversities over independent and non-identically distributed (i.ni.d.) Rayleigh fading channels.

TL;DR: It is presented in the paper that superior correlation of GDFT over DFT manifests itself in improved BER performance in direct sequence CDMA based multi-user communications systems.

TL;DR: It is shown that the amount of knowledge regarding the reserved resources in the neighboring cell plays a crucial role in the performance of ICI schedulers, and a minimum expected number of collision scheduler is developed and its performance is investigated.

TL;DR: This paper studies the physical-layer performance of a cooperative system based on distributed linear block coding, and results in terms of bit error rate and outage probability are presented when perfect decoding at the user location is assumed.

TL;DR: This paper derives the optimum power allocation algorithm for multi-band MC-CDMA systems, where optimum is defined as minimal BER under the constraint of fixed transmitted power, assuming knowledge of power attenuation of different sub-bands.

TL;DR: The Nash equilibrium of the power control game is proved to be always inside the rate region where successive decoding techniques are used at the receiver, for which numerical results at low signal-to-noise ratios (SNRs) have been provided.

TL;DR: This paper derives the optimal PDPR in terms of average symbol error rate (SER) and spectral efficiency according to different receiver types such as zero-forcing and minimum mean square error (MMSE) and results in higher spectral efficiency and lower SER without using any additional resource.

TL;DR: Simulation results show that the proposed schemes significantly outperform direct transmission and reference schemes under the same transmit power and bandwidth efficiency.

TL;DR: This paper considers the efficient design of MIMO-OFDM receivers in preamble-based systems and addresses the problem of large processing delays associated with pre-computations and symbol detection, and proposes a redesign of channel decomposition algorithms which achieves a better matching of the processing rate of M IMO- OFDM receivers to the real-time processing deadlines imposed by the structure of the incoming data packets.

TL;DR: Signal processing related designs such as equalization, detection, and synchronization, as well as coding related issues such as adaptive modulation and coding, low complexity decoding, and practical code design are reviewed.

TL;DR: This work considers a multiple access MAC fading channel with two users communicating with a common destination, where each user mutually acts as a relay for the other one as well as wishes to transmit its own information as opposed to having dedicated relays.

TL;DR: A new relaying system and three cooperation protocols suited for SCLDGM codes are proposed and computer simulation results show that the BER performance of the proposed system equals to that of conventional LDPC coded relay system.

TL;DR: Simulation results show that the proposed algorithms can effectively cancel the IBI and ICI and significantly improve the performance in OFDM systems.