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DIGITAL AUDIO modulation IN THE PAL AND NTSC LASERVISION VIDEO DISK coding FORMATS

IEEE TRANSACTIONS ON CONSUMER ELECTRONICS 1983年第4期29卷 543-551页

作者： IMMINK, KAS HOOGENDIJK, AH KAHLMAN, JA Philips Research Laboratories Eindhoven Netherlands

We present an extension of the current LaserVision video disc format that includes a digital audio signal. We show the feasibility of a combined digital audio signal according to the Compact Disc Digital Audio format and the current analog audio signals in the NTSC video format, enabling the realization of a compatible system. For the PAL and SECAM video formats we show the feasibility of digital audio, but unfortunately it cannot be combined with the analog audio carriers.

关键词： Digital modulation modulation coding Space vector pulse width modulation Pulse modulation Signal to noise ratio Laboratories Optical pulses Frequency modulation Noise reduction Quantization

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UNIFIED REPRESENTATION OF DIFFERENTIAL PULSE-CODE modulation (DPCM) AND TRANSFORM coding SYSTEMS

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IEEE TRANSACTIONS ON COMMUNICATIONS 1974年第5期CO22卷 692-696页

作者： HABIBI, A HERSHEL, RS UNIV SO CALIF DEPT ELECT ENGNLOS ANGELESCA 90007

We consider a transform coding system that uses a lower-triangular transformation to uncorrelate the data. Based on this transformation we propose a generalized differential pulse code modulation (DPCM) system and show that at high bit rates it performs almost as well as coding by the method of principal components (Karhunen-Loeve transformation). This study connects the transform coding system to the DPCM encoder by showing that the proposed system simplifies to a standard DPCM encoder for Markov data.

关键词： Pulse modulation modulation coding Transform coding Covariance matrix Vectors Signal generators Contracts Markov processes Bit rate Quantization

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DESIGN OF coding AND modulation FOR POWER-EFFICIENT USE OF A BAND-LIMITED OPTICAL CHANNEL

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IEEE TRANSACTIONS ON COMMUNICATIONS 1983年第4期31卷 560-565页

作者： SNYDER, DL GEORGHIADES, CN Department of Electrical Engineering Washington University Saint Louis MO USA

We show that Q -ary pulse-position modulation with raised cosine pulses minimizes the average power (photons/s) required to communicate at a specified throughput rate (nats/s) over a band-limited, noisy optical channe... 详细信息

关键词： Optical design modulation coding Optical modulation Optical receivers Pulse modulation Bandwidth Optical pulses Throughput Network address translation Demodulation

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COMBINED coding AND modulation APPROACH FOR COMMUNICATION OVER DISPERSIVE CHANNELS

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IEEE TRANSACTIONS ON COMMUNICATIONS 1973年第3期CO21卷 159-174页

作者： CHASE, D GEN ATRONICS CORP PHILADELPHIAPA 19118

The concept of combining the design of the error-correcting-coding approach and the modulation format is treated in general terms and its effectiveness is demonstrated by a specific implementation referred to as Codem I. A new decoding algorithm is presented, which has the interesting property that the only channel measurement information utilized is the relative reliability of each received digit. The effectiveness of this decoding technique is demonstrated by computer simulation over three different channel models for dispersive channels. Comparisons of the performance of Codem I with the more conventional 16-tone (four-phase DPSK) HF modem are obtained by actual field results as well as by computer simulations. Improvement in error probability in the region of two orders of magnitude is demonstrated when both systems are operating under similar channel conditions and at equal data rates. A further improvement is demonstrated when channel measurement information is used to reject a small percentage (typically less than 3 percent) of codewords that are considered unreliable.

关键词： modulation coding Dispersion Decoding Computer simulation Modems Error probability Error correction Delay Algorithm design and analysis Differential quadrature phase shift keying

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5G-coded fluid antenna multiple access over block fading channels

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ELECTRONICS LETTERS 2025年第1期61卷

作者： Hong, Hanjiang Wong, Kai-Kit Tong, Kin-Fai Xu, Hao Li, Haoyang UCL Dept Elect & Elect Engn London England Shanghai Jiao Tong Univ Cooperat Medianet Innovat Ctr CMIC Shanghai Peoples R China

Fluid antenna multiple access (FAMA) is a concept capable of massive connectivity on the same physical channel without the need of precoding or interference cancellation, by exploiting a super-high dimensional received signal in the spatial domain from fluid antenna system (FAS). This letter investigates the use of 5G New Radio (NR) modulation coding Scheme (MCS) for FAMA systems to improve its connectivity over block fading channels. In particular, an iterative decoding receiver with iterative interference covariance estimation is proposed, designed explicitly for slow fading channels. Extrinsic information transfer (EXIT) chart is used to analyze the performance of the proposed iterative receiver. Both EXIT chart analysis and numerical results indicate that the proposed receiver outperforms the existing approach that uses fixed covariance in block fading channels. Also, the results indicate that coded FAMA can serve 100 user terminals (UTs) at the rate of 0.5 bit/s/Hz under rich scattering.

关键词： 5G mobile communication demodulation iterative decoding modulation coding multi-access systems

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PERFORMANCE EVALUATION OF COMBINED coding AND modulation SCHEMES FOR NONLINEAR CHANNELS

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IEEE TRANSACTIONS ON COMMUNICATIONS 1987年第9期35卷 969-972页

作者： MARSAN, MA ALBERTENGO, G BENEDETTO, S Dipartimento di Elettronica Politecnico di Torino Torino Italy

The performance of combined coding and modulation schemes in channels with intersymbol interference and nonlinearities is studied using an analytical approach. The class of possible receivers is presented, and a generalization of the minimum Euclidean distance used for the asymptotic analysis of the performance of combined coding and modulation schemes on AWGN channels is introduced. Numerical results are presented for coded 16-PSK modulation.

关键词： modulation coding Performance analysis Signal analysis Euclidean distance Binary sequences Intersymbol interference AWGN channels Signal generators Error probability Signal to noise ratio

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ADAPTIVE DELTA modulation FOR COMPANDED PCM coding AND DEcoding

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IEEE TRANSACTIONS ON COMMUNICATIONS 1977年第5期25卷 557-561页

作者： SONG, DC N ELECT CO COLUMBUSOH 43220

An adaptive delta modulator and demodulator are used as the first and last stages in a system for coding and decoding telephone signals into μ = 255 companded pulse code modulation (PCM). The system objectives are to devise an economic coder and decoder that is reliable, free of potentiometer adjustments, and convenient for automated manufacturing for large quantity production. The strategy is a shift of circuit emphasis from analog to digital in order to take full advantage of low-cost, low-speed digital processing technology such as MOS/LSI to achieve the desired objectives. The system structure, digital signal processing, system implementation, and performance of the prototype are discussed in this paper.

关键词： Delta modulation Decoding Pulse modulation modulation coding Demodulation Telephony Potentiometers Manufacturing automation Production systems

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Research on Information Reconstruction Mechanism of Ghost Imaging Based on Rayleigh Fading Channel

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IEEE PHOTONICS TECHNOLOGY LETTERS 2025年第5期37卷 309-312页

作者： Ye, Hualong Guo, Daidou Changshu Inst Technol Sch Elect & Informat Engn Suzhou 215500 Peoples R China Univ Shanghai Sci & Technol Sch Opt Elect & Comp Engn Shanghai 200093 Peoples R China

In previous studies of ghost imaging transmission methods, the influence of real transmission channel on communication quality is weakened to a certain extent. Therefore, in this letter, a channel transmission model in real scenes (Rayleigh fading channel) is introduced. By leveraging the ultra-strong anti-noise capability and weak-signal imaging characteristics of ghost imaging, we explore ways to enhance the transmission of information while minimizing channel interference. Through the analysis of metrics such as bit error rate (BER), structural similarity (SSIM) and peak signal-to-noise ratio (PSNR), the proposed method effectively addresses issues like low restoration accuracy and limited feasibility of current transmission imaging methods, providing a new imaging technology for the research in the field of image transmission and holding significant theoretical value.

关键词： Imaging Image reconstruction modulation Mathematical models Image coding modulation coding Frequency modulation Rayleigh channels Optical imaging Lenses Rayleigh fading channel ghost imaging modulation coding reconstruction

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Eisenstein Integer based Multi-dimensional Coded modulation for Physical-layer Network coding over F₄ in the Two-way Relay Channels

Eisenstein Integer based Multi-dimensional Coded Modulation ...

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European Conference on Networks and Communications (EuCNC)

作者： Fang, Dong Burr, Alister Wang, Yi Univ York Dept Elect York YO10 5DD N Yorkshire England

ISBN: (纸本)9781479952809

A novel multi-dimensional coded modulation based on Eisenstein integer Z[omega] is proposed for physical-layer network coding (PNC) over the finite field F-4 in the two-way relay channel (TWRC). The duo-binary turbo code is used to design the Construction A-based Z [omega]-lattice for the proposed PNC over the lattice partition F-4 congruent to Z [omega]/2Z[omega]. In order to improve the spectral efficiency, Ungerboeck's mapping by set partitioning (MSP) is adopted for transmission of coded and uncoded layers of the designed Construction A-based Z [omega]-lattice. A novel soft-demapper and a new ML decoder with size-reduced search space are proposed to decode the superimposed lattices at the relay. A new mapping selection criterion which maximizes the mutual information between the received signal and the network coded combination is introduced for the proposed softdemapper. Numerical results show that the proposed PNC over F-4 is superior to compute-and-forward using integer-forcing and channel decoder [5, 10].

关键词： Bidirectional modulation coding Physical layer relay channel Eisenstein integers hierarchical network PNC Channel Decoder Network coding turbo codes Integer received signal

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Spatial modulation with Joint Antenna Index and Symbol Index Turbo Trellis coding

Spatial Modulation with Joint Antenna Index and Symbol Index...

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International Symposium on Signals, Circuits and Systems (ISSCS)

作者： Vladeanu, Calin Univ Politehn Bucuresti Fac Elect Telecommun & Informat Theory Bucharest 061071 Romania

ISBN: (纸本)9781467361415

In this article, we introduce a new spatial modulation (SM) transmission scheme using turbo trellis coding (TTC) for both antenna and symbol indexes. In spatial modulation scheme with trellis coding (SM-TC), the transmitter encodes the information bits before selecting the transmit antenna and transmitted symbol indexes. The SM-TC scheme is a generalization of the turbo trellis coded SM (TTCSM) scheme, which encodes just the information bits used to select the transmit antenna index. The performances of the SM-TC scheme can be considerably enhanced by using parallel concatenated turbo coding. The new SM-TTC scheme combines the SM-TC transmission with conventional parallel turbo trellis-coded modulation (TTCM). The bit error rate (BER) performances are evaluated using simulations for PSK-SM-TTC transmissions over stationary Rayleigh, Rician, and spatially correlated (SC) fading channels with additive white Gaussian noise (AWGN). Simulation results reveal that the SM-TTC scheme performs better than the previous TTCSM scheme when transmitting over a SC fading channel, especially for a large number of receive antennas.

关键词： AWGN error statistics fading channels modulation coding trellis codes turbo codes

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