Multiuser detection

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Multiuser detection (also known as joint detection) is one of the receiver design technology for detecting desired signal(s) from interference and noise. Traditionally single-user receiver is known suffering from the so-called near-far problem, where a near-by or strong signal source may block the signal receiption of far-away or weak user(s). The near-far is more serious in CDMA-liked wireless multi-user communication systems. (Wikipedia.org)






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ICC 2021 - IEEE International Conference on Communications

IEEE ICC is one of the two flagship IEEE conferences in the field of communications; Montreal is to host this conference in 2021. Each annual IEEE ICC conference typically attracts approximately 1,500-2,000 attendees, and will present over 1,000 research works over its duration. As well as being an opportunity to share pioneering research ideas and developments, the conference is also an excellent networking and publicity event, giving the opportunity for businesses and clients to link together, and presenting the scope for companies to publicize themselves and their products among the leaders of communications industries from all over the world.


2020 59th IEEE Conference on Decision and Control (CDC)

The CDC is the premier conference dedicated to the advancement of the theory and practice of systems and control. The CDC annually brings together an international community of researchers and practitioners in the field of automatic control to discuss new research results, perspectives on future developments, and innovative applications relevant to decision making, automatic control, and related areas.


2020 IEEE International Conference on Systems, Man, and Cybernetics (SMC)

The 2020 IEEE International Conference on Systems, Man, and Cybernetics (SMC 2020) will be held in Metro Toronto Convention Centre (MTCC), Toronto, Ontario, Canada. SMC 2020 is the flagship conference of the IEEE Systems, Man, and Cybernetics Society. It provides an international forum for researchers and practitioners to report most recent innovations and developments, summarize state-of-the-art, and exchange ideas and advances in all aspects of systems science and engineering, human machine systems, and cybernetics. Advances in these fields have increasing importance in the creation of intelligent environments involving technologies interacting with humans to provide an enriching experience and thereby improve quality of life. Papers related to the conference theme are solicited, including theories, methodologies, and emerging applications. Contributions to theory and practice, including but not limited to the following technical areas, are invited.


2020 IEEE International Symposium on Circuits and Systems (ISCAS)

The International Symposium on Circuits and Systems (ISCAS) is the flagship conference of the IEEE Circuits and Systems (CAS) Society and the world’s premier networking and exchange forum for researchers in the highly active fields of theory, design and implementation of circuits and systems. ISCAS2020 focuses on the deployment of CASS knowledge towards Society Grand Challenges and highlights the strong foundation in methodology and the integration of multidisciplinary approaches which are the distinctive features of CAS contributions. The worldwide CAS community is exploiting such CASS knowledge to change the way in which devices and circuits are understood, optimized, and leveraged in a variety of systems and applications.


GLOBECOM 2020 - 2020 IEEE Global Communications Conference

IEEE Global Communications Conference (GLOBECOM) is one of the IEEE Communications Society’s two flagship conferences dedicated to driving innovation in nearly every aspect of communications. Each year, more than 2,900 scientific researchers and their management submit proposals for program sessions to be held at the annual conference. After extensive peer review, the best of the proposals are selected for the conference program, which includes technical papers, tutorials, workshops and industry sessions designed specifically to advance technologies, systems and infrastructure that are continuing to reshape the world and provide all users with access to an unprecedented spectrum of high-speed, seamless and cost-effective global telecommunications services.


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Periodicals related to Multiuser detection

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Communications Letters, IEEE

Covers topics in the scope of IEEE Transactions on Communications but in the form of very brief publication (maximum of 6column lengths, including all diagrams and tables.)


Communications, IEEE Transactions on

Telephone, telegraphy, facsimile, and point-to-point television, by electromagnetic propagation, including radio; wire; aerial, underground, coaxial, and submarine cables; waveguides, communication satellites, and lasers; in marine, aeronautical, space and fixed station services; repeaters, radio relaying, signal storage, and regeneration; telecommunication error detection and correction; multiplexing and carrier techniques; communication switching systems; data communications; and communication theory. In addition to the above, ...


Computer-Aided Design of Integrated Circuits and Systems, IEEE Transactions on

Methods, algorithms, and human-machine interfaces for physical and logical design, including: planning, synthesis, partitioning, modeling, simulation, layout, verification, testing, and documentation of integrated-circuit and systems designs of all complexities. Practical applications of aids resulting in producible analog, digital, optical, or microwave integrated circuits are emphasized.


Information Theory, IEEE Transactions on

The fundamental nature of the communication process; storage, transmission and utilization of information; coding and decoding of digital and analog communication transmissions; study of random interference and information-bearing signals; and the development of information-theoretic techniques in diverse areas, including data communication and recording systems, communication networks, cryptography, detection systems, pattern recognition, learning, and automata.


Latin America Transactions, IEEE (Revista IEEE America Latina)

The IEEE Region 9 is releasing the IEEE Latin America Transactions to enable the publication of non-published and technically excellent papers from Latin American engineers, in Spanish or Portuguese languages. Engineers and researchers from Portugal and Spain (and others countries with the same language) are also very welcome to submit their proposals.


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Xplore Articles related to Multiuser detection

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On the Performance of SC-FDE Receivers for Base Station Cooperation Systems with Rate-Limited Backhaul Links

SCC 2013; 9th International ITG Conference on Systems, Communication and Coding, 2013

In this paper we consider BS (Base Station) cooperation schemes for the uplink of broadband wireless systems based on SC-FDE schemes (Single-Carrier with Frequency-Domain Equalization). We have up to P MTs (Mobile Terminals) transmitting simultaneously to R BSs and the signals received by each BS are send to a central unit that employs an iterative frequency-domain receiver to separate different ...


Blind Multiuser Detection Over Highly Dispersive CDMA Channels

IEEE Transactions on Communications, 2004

Blind Multiuser Detection Over Highly Dispersive CDMA Channels This paper addresses blind multiuser detection in a direct-sequence code-division multiple-access (DS-CDMA) network in presence of both multiple-access interference and intersymbol interference. In particular, it considers a DS- CDMA system where<tex>$K$</tex>, our<tex>$bar N$</tex>users, are transmitting: the<tex>$bar N$</tex>admissible spreading codes are known and so is the code of the user to be demodulated. ...


Sum and Difference of Two Squared Correlated Nakagami Variates in Connection With the McKay Distribution

IEEE Transactions on Communications, 2004

Sum and Difference of Two Squared Correlated Nakagami Variates in Connection With the McKay Distribution General formulas for the probability density function of the sum and the difference of two correlated, but not necessarily identically distributed, squared Nakagami variates (or equivalently, gamma variates) are derived. These expressions are shown to be in the form of the McKay “Bessel function” distributions. ...


SpaceTime SpreadingAssisted Broadband Multicarrier DSCDMA: System Design and Performance Analysis

Single and Multi-Carrier DS-CDMA: Multi-User Detection, Space-Time Spreading, Synchronisation, Networking?and Standards, None

This chapter contains sections titled: * Motivation and Outline * Comparison of CDMA, MC-CDMA and MC DS-CDMA * Performance of Broadband Multicarrier DS-CDMA Using STS * TF-domain Spreading Aided MC-CDMA Using LS Codes * Chapter Summary and Conclusion ]]>


Optimal filtering algorithm-based multiuser detector for fast fading CDMA systems

Tsinghua Science and Technology, 2007

A multiuser detector was developed for fast fading code-division multiple- access systems by representing the channels as a system with the multiplicative noise (SMN) model and then using the known optimal filtering algorithm for the SMN for multiuser detection (MUD). This multiuser detector allows the channel response to be stochastic in one symbol duration, which can be regarded as an ...


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IEEE-USA E-Books

  • On the Performance of SC-FDE Receivers for Base Station Cooperation Systems with Rate-Limited Backhaul Links

    In this paper we consider BS (Base Station) cooperation schemes for the uplink of broadband wireless systems based on SC-FDE schemes (Single-Carrier with Frequency-Domain Equalization). We have up to P MTs (Mobile Terminals) transmitting simultaneously to R BSs and the signals received by each BS are send to a central unit that employs an iterative frequency-domain receiver to separate different MTs. To reduce the bit rate requirements at the backhaul links we sample and quantize the signals at each BS and the receiver is specially designed taking into account the adopted quantization scheme. We also propose a relatively simple, yet quite accurate analytical approach for obtaining the performance of the proposed receivers. Index Terms: BS Cooperation, SC-FDE, Analytical Performance Evaluation, Quantization.

  • Blind Multiuser Detection Over Highly Dispersive CDMA Channels

    Blind Multiuser Detection Over Highly Dispersive CDMA Channels This paper addresses blind multiuser detection in a direct-sequence code-division multiple-access (DS-CDMA) network in presence of both multiple-access interference and intersymbol interference. In particular, it considers a DS- CDMA system where<tex>$K$</tex>, our<tex>$bar N$</tex>users, are transmitting: the<tex>$bar N$</tex>admissible spreading codes are known and so is the code of the user to be demodulated. The number of interferers, the signatures of a certain number, possible all, of the interferers, and the channel-impulse response of each active user are unknown. The spreading codes of the unknown interferers are determined via a procedure that exploits the knowledge of the set of admissible transmitted codes and of the known active codes. The procedure applies to both single and multiple receiving antennas. The performance assessment of a blind decorrelating detector, implemented by resorting to the proposed identification procedure, shows that it outperforms a plain subspace-based blind decorrelator for small sizes of the estimation sample.

  • Sum and Difference of Two Squared Correlated Nakagami Variates in Connection With the McKay Distribution

    Sum and Difference of Two Squared Correlated Nakagami Variates in Connection With the McKay Distribution General formulas for the probability density function of the sum and the difference of two correlated, but not necessarily identically distributed, squared Nakagami variates (or equivalently, gamma variates) are derived. These expressions are shown to be in the form of the McKay “Bessel function” distributions. In addition, formulas for the moments of these distributions, in terms of Gauss' hypergeometric function, are provided. An application of these new results, relevant to the calculation of outage probability in the presence of self-interference, is finally discussed.

  • SpaceTime SpreadingAssisted Broadband Multicarrier DSCDMA: System Design and Performance Analysis

    This chapter contains sections titled: * Motivation and Outline * Comparison of CDMA, MC-CDMA and MC DS-CDMA * Performance of Broadband Multicarrier DS-CDMA Using STS * TF-domain Spreading Aided MC-CDMA Using LS Codes * Chapter Summary and Conclusion ]]>

  • Optimal filtering algorithm-based multiuser detector for fast fading CDMA systems

    A multiuser detector was developed for fast fading code-division multiple- access systems by representing the channels as a system with the multiplicative noise (SMN) model and then using the known optimal filtering algorithm for the SMN for multiuser detection (MUD). This multiuser detector allows the channel response to be stochastic in one symbol duration, which can be regarded as an effective method of MUD for fast fading CDMA systems. Performance analyses show that the multiuser detector is theoretically valid for CDMA systems over fast fading channels. Simulations show that the multiuser detector performs better than the Kalman filter-based multiuser detector with a faster convergence rate and lower bit error rate.

  • Overview of Genetic Algorithms Used for MultiUser Detection

    This chapter contains sections titled: * An Introduction to Genetic Algorithms * Genetic Algorithms at Work * How do GAs Operate? * Elements of Genetic Algorithms * Survey of Genetic Algorithm-assisted CDMA Multi-user Detection * Chapter Summary and Conclusions ]]>

  • Comparative analysis of conventional and multiuser detectors in multisensor receivers

    Multiuser detection has been proposed to improve the performance of direct- sequence spread-spectrum code-division multiple-access (DS-CDMA) systems. Use of multiple sensors (antenna elements or base stations) can be used to improve the signal-to-noise ratio and counter the effects of fading in any communication system. In this paper, multisensor multiuser detection is analyzed. It is shown by analysis and numerical examples that the use of multiple sensors averages the multiple-access interference (MAI) out towards zero even without multiuser detection. The performance of linear multisensor receivers with and without multiuser detection is analyzed and compared. The examples show that relatively good performance can be obtained without multiuser detection with moderate number of users and under a reasonable near- far problem.

  • Reduced State Sequence Detection Asynchronous Gaussian Multiple-Access Channels

    The problem of coherent multiuser detection is considered for the K-user asynchronous Gaussian Code-Division multiple Access (CDMA) channel. The maximum likelihood sequence detector (MLSD) is asymptotically optimal in that it achieves the highest error exponent of the bit error probability for each user. However, the MLSD can only be implemented by a dynamic programming algorithm whose complexity depends exponentially on K. In order to mitigate the complexity of this scheme, a class of group detection strategies is derived based on optimal statistical inferential procedures. Each member of this class of detectors corresponds to a L group partition of the K users, and consists of a bank of L group detectors, one for demodulating the information symbols of users in each group. Each group detector is a reduced state sequence detector with the dominant complexity determined by the computation of the solution of a combinatorial optimization problem via a forward dynamic programming algorithm. This algorithm has a complexity that is exponential in the number of users in the corresponding group. The overall complexity is determined by the size of the largest group which is a design parameter that can be chosen to be only as large as complexity considerations allow. The performance analysis of the group detection scheme is obtained by deriving asymptotically tight upper and lower bounds on the bit error probability, thereby characterizing its multiuser asymptotic efficiency.

  • Solving the single machine total weighted tardiness scheduling problem using a hybrid simulated annealing algorithm

    An application of a new hybrid optimization approach for the single-machine total weighted tardiness problem (SMTWTP) is presented in this article. SMTWTP is known Io be NP-hard, and thus the right way to proceed is through the use of heuristic techniques. The proposed approach combines the stochastic sampling of a simulated annealing algorithm (SAA) together with features borrowed from the field of evolutionary algorithms, such as the population of individual solutions and a special unary recombination operator. The performance of the hybrid SSA is tested over multiple benchmark problems with up to 50 jobs on a single machine and compared to that of other previously studied heuristics. The results obtained are in average less than 1% above the known global optimum solutions

  • Multiuser Detection Method for Single-Carrier Transmission in Uplink Multiuser MIMO Access

    Single-carrier (SC) transmission with frequency- domain equalization (FDE) is expected to expand the service area of wireless communication systems by taking advantage of its lower peak-to-average power ratio (PAPR) compared to when using orthogonal frequency division multiplexing (OFDM). In the uplink, the transmit timing difference among the signals from multiple mobile terminals (MTs) becomes significant in a large service area. If the difference in arrival timing among MTs exceeds the cyclic prefix (CP) length, it is difficult to separate the signal of each MT and the transmission quality is severely degraded. In this paper, we propose a novel multiuser detection (MUD) technique that can separate the signals regardless of the difference in the arrival timing between MTs with an acceptable level of calculation complexity. The achievable bit error rate (BER) performance is evaluated by computer simulation in a frequency selective fading channel and the results confirm the effectiveness of the proposed method.



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