Constellation diagram

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A constellation diagram is a representation of a signal modulated by a digital modulation scheme such as quadrature amplitude modulation or phase-shift keying. It displays the signal as a two-dimensional scatter diagram in the complex plane at symbol sampling instants. (Wikipedia.org)






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2020 IEEE International Symposium on Information Theory (ISIT)

Information theory, coding theory, communication theory, signal processing, and foundations of machine learning


2020 IEEE Wireless Communications and Networking Conference (WCNC)

IEEE WCNC is the world premier wireless event that brings together industry professionals, academics, and individuals from government agencies and other institutions to exchange information and ideas on the advancement of wireless communications and networking technology. The conference will feature a comprehensive technical program offering numerous technical sessions with papers showcasing the latest technologies, applications and services. In addition, the conference program includes workshops, tutorials, keynote talks from industrial leaders and renowned academics, panel discussions, a large exhibition, business and industrial forums.


2020 Optical Fiber Communications Conference and Exhibition (OFC)

The Optical Fiber Communication Conference and Exhibition (OFC) is the largest global conference and exhibition for optical communications and networking professionals. For over 40 years, OFC has drawn attendees from all corners of the globe to meet and greet, teach and learn, make connections and move business forward.OFC attracts the biggest names in the field, offers key networking and partnering opportunities, and provides insights and inspiration on the major trends and technology advances affecting the industry. From technical presentations to the latest market trends and predictions, OFC is a one-stop-shop.


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.


ICC 2020 - 2020 IEEE International Conference on Communications

All topics relating to existing and emerging communications networking technologies.


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Antennas and Propagation, IEEE Transactions on

Experimental and theoretical advances in antennas including design and development, and in the propagation of electromagnetic waves including scattering, diffraction and interaction with continuous media; and applications pertinent to antennas and propagation, such as remote sensing, applied optics, and millimeter and submillimeter wave techniques.


Broadcasting, IEEE Transactions on

Broadcast technology, including devices, equipment, techniques, and systems related to broadcast technology, including the production, distribution, transmission, and propagation aspects.


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, ...


Consumer Electronics, IEEE Transactions on

The design and manufacture of consumer electronics products, components, and related activities, particularly those used for entertainment, leisure, and educational purposes


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Most published Xplore authors for Constellation diagram

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Xplore Articles related to Constellation diagram

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A general parity check equation for rotationally invariant trellis codes

IEEE/CAM Information Theory Workshop at Cornell, 1989

We present a general parity check equation for rate k/(k+ 1) convolutional codes.


Set Partitioning and Multilevel Coding for Codes Over Gaussian Integer Rings

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

This work demonstrates that the concept of set partitioning can be applied to Gaussian integer rings. It is shown that it is always possible to partition the Gaussian integer rings into subsets in a manner that the minimum Euclidean distance of each subset is strictly larger than in the original set. This enables multilevel code constructions for codes over Gaussian ...


A Carrier Recovery Algorithm for High Order QAM Signals

2010 6th International Conference on Wireless Communications Networking and Mobile Computing (WiCOM), 2010

The carrier recovery is one key technique in the demodulation of high order quadrature amplitude modulation (QAM) signals. A carrier recovery algorithm which switches between multi-threshold polarity decision mode and decision directed mode according to the standard deviation of the frequency of numerically controlled oscillator (NCO) is proposed. The proposed algorithm can detect a proper time for the mode switch ...


A new bit-interleaved coded modulation scheme using shaping coding

IEEE Global Telecommunications Conference, 2004. GLOBECOM '04., 2004

We present a new and simple method for combining constellation shaping and bit-interleaved coded modulation over Gaussian channels. By considering the example of a 3-bit/dim turbo coding scheme using a 16-PAM constellation, it is shown that this technique can provide shaping gains of 0.7 dB, and that error performance within 1.6 dB of the continuous-input channel capacity limit is achieved.


Optimum signal constellation design and mapping rule for few-mode fiber based LDPC-coded CO-OFDM

CLEO: 2013, 2013

We propose an OSCD-based LDPC-coded mode-multiplexed CO-OFDM system as multi- Tb/s enabling technology, and demonstrate that 16-OSCD with optimized mapping rule outperforms the 16-QAM by 0.9dB over 1000km of few-mode fiber in strong coupling regime.


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Educational Resources on Constellation diagram

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IEEE-USA E-Books

  • A general parity check equation for rotationally invariant trellis codes

    We present a general parity check equation for rate k/(k+ 1) convolutional codes.

  • Set Partitioning and Multilevel Coding for Codes Over Gaussian Integer Rings

    This work demonstrates that the concept of set partitioning can be applied to Gaussian integer rings. It is shown that it is always possible to partition the Gaussian integer rings into subsets in a manner that the minimum Euclidean distance of each subset is strictly larger than in the original set. This enables multilevel code constructions for codes over Gaussian integers.

  • A Carrier Recovery Algorithm for High Order QAM Signals

    The carrier recovery is one key technique in the demodulation of high order quadrature amplitude modulation (QAM) signals. A carrier recovery algorithm which switches between multi-threshold polarity decision mode and decision directed mode according to the standard deviation of the frequency of numerically controlled oscillator (NCO) is proposed. The proposed algorithm can detect a proper time for the mode switch to yield lower steady state error. The simulation results demonstrate the effectiveness of the proposed algorithm in improving the performance of blind carrier recovery.

  • A new bit-interleaved coded modulation scheme using shaping coding

    We present a new and simple method for combining constellation shaping and bit-interleaved coded modulation over Gaussian channels. By considering the example of a 3-bit/dim turbo coding scheme using a 16-PAM constellation, it is shown that this technique can provide shaping gains of 0.7 dB, and that error performance within 1.6 dB of the continuous-input channel capacity limit is achieved.

  • Optimum signal constellation design and mapping rule for few-mode fiber based LDPC-coded CO-OFDM

    We propose an OSCD-based LDPC-coded mode-multiplexed CO-OFDM system as multi- Tb/s enabling technology, and demonstrate that 16-OSCD with optimized mapping rule outperforms the 16-QAM by 0.9dB over 1000km of few-mode fiber in strong coupling regime.

  • Addition of Gaussian random signals for peak to average power ratio reduction in OFDM systems

    This paper investigates the problem of peak-to-average power ratio (PAPR) in orthogonal frequency division multiplexing (OFDM) system. It presents a new PAPR reduction method based on addition of power of random signals in a complex Gaussian distribution form to the data constellation points in frequency domain. The added signals alter the constellation shape by shifting the constellation points from their original positions into new positions. This change in shape is accompanied by changes in the statistical properties and reduction in the PAPR value. There is no need to send side information to the receiver for signal recovery. This scheme significantly reduces the PAPR value without decrease in the bit rate or BER performance. Moreover, there is no out-of-band distortion resulted. For 64-PSK OFDM system using 128 data sub- carriers, >4 dB reduction in the PAPR value is achieved by using the proposed PAPR reduction method.

  • Improvement of higher order modulations for MUROS

    MUROS using high order modulation (HOM) is one of techniques for improving speech efficiency for 3GPP GERAN evolution. However, the conventional HOM for MUROS scheme shows high complexity because of the change of modulation format. Therefore, in this paper, an improved HOM scheme for the MUROS is proposed which employs a repetition transmission using surplus bits.

  • On the nonexistence of rate-one generalized complex orthogonal designs

    Orthogonal space-time block coding proposed recently by Alamouti (1998) and Tarokh et al. (1999) is a promising scheme for information transmission over Rayleigh-fading channels using multiple transmit antennas due to its favorable characteristics of having full transmit diversity and a decoupled maximum- likelihood (ML) decoding algorithm. Tarokh et al. extended the theory of classical orthogonal designs to the theory of generalized, real, or complex, linear processing orthogonal designs and then applied the theory of generalized orthogonal designs to construct space-time block codes (STBC) with the maximum possible diversity order while having a simple decoding algorithm for any given number of transmit and receive antennas. It has been known that the STBC constructed in this way can achieve the maximum possible rate of one for every number of transmit antennas using any arbitrary real constellation and for two transmit antennas using any arbitrary complex constellation. Contrary to this, in this correspondence we prove that there does not exist rate-one STBC from generalized complex linear processing orthogonal designs for more than two transmit antennas using any arbitrary complex constellation.

  • Pilot design for OFDM systems in the presence of phase noise

    The bit error rate performance of orthogonal frequency division multiplexing (OFDM) systems is severely degraded in the presence of phase noise. The effect of phase noise on an OFDM signal has been studied in the literature. The OFDM signal sub-carriers are distorted due to phase noise in two ways. First is the constant phase shift of all the sub-carriers, and second is the inter-carrier interference. A pilot structure is proposed to estimate the phase noise spectral components in every data OFDM symbol. The pilot design parameters are specifically optimized for an OFDM system in the presence of phase noise.

  • Meteor burst communications LPI applications

    A technique that enhances the performance of meteor-burst communications is described. The technique, the feedback adaptive variable rate (FAVR) system, maintains a feedback channel that allows the transmitted bit rate to mimic the time behavior of the received power so that a constant bit energy is maintained. This results in a constant probability of bit error in each transmitted bit. Experimentally determined meteor-burst channel characteristics and FAVR system simulation results are presented.<<ETX>>



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