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  • 1
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    On the equivalence in performance of several phase-locked loop configurations (1970)
    In:  Other Sources
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    Publikationsdatum: 2011-08-16
    Beschreibung: Dynamic noise performance equivalence of phase locked or double superheterodyne tracking loops, using noise free external generator
    Schlagwort(e): COMMUNICATIONS
    Materialart: ; ADEMIE DES SCIENCES
    Format: text
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  • 2
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    On the capacity of a cascade of identical discrete memoryless nonsingular channels (1970)
    In:  Other Sources
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    Publikationsdatum: 2011-08-16
    Beschreibung: Capacity calculation of N identical discrete memoryless nonsingular channels cascade, discussing dependence on eigenvalues and eigenvectors of subchannel transition matrices
    Schlagwort(e): COMMUNICATIONS
    Materialart: ; STITUTION OF ENGINEE
    Format: text
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  • 3
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    Telecommunication systems engineering (1973)
    In:  Other Sources
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    Publikationsdatum: 2011-08-16
    Beschreibung: Telecommunication network concepts are discussed together with carrier-tracking loops employing the phase-lock principle, phase and Doppler measurements in two-way phase-coherent tracking systems, range measurements by phase-coherent techniques, and questions of phase-coherent detection with perfect reference signals and with noisy reference signals. The design of one-way and two-way phase-coherent communication systems is considered, giving attention to the optimal design of single-channel systems, the design of two-channel systems, and the design of multichannel systems. Other topics explored include the design and the performance of phase-coherent systems preceded by band-pass limiters, symbol synchronization and its effects on data detection, noncoherent communication over the Gaussian channel, and tracking loops with improved performance.
    Schlagwort(e): COMMUNICATIONS
    Format: text
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  • 4
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    On the selection of a sampling filter bandwidth for a digital data detector. (1972)
    In:  Other Sources
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    Publikationsdatum: 2011-08-16
    Beschreibung: Consideration of the problem of selecting a low-pass sampling bandwidth for the digital mechanization of a matched-filter bit-synchronizer combination. An attempt is made to determine how large a data rate can be provided for a fixed sampling rate (limited by hardware considerations on the sampling device) without paying an excessive penalty in SNR performance.
    Schlagwort(e): COMMUNICATIONS
    Materialart: IEEE Transactions on Communications; COM-20; June 197
    Format: text
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  • 5
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    L-orthogonal signal transmission and detection. (1972)
    In:  Other Sources
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    Publikationsdatum: 2019-06-27
    Beschreibung: A study of L-orthogonal signal performance represents an approach wherein the performance of polyphase and orthogonal signal sets stand out as the extreme special cases. The L-orthogonal signal model and its associated bandwidth properties are briefly discussed. System performance is investigated by presenting tight upper and lower bounds on the error probability performance of the maximum-likelihood receiver of L-orthogonal signals suggested by Reed and Scholtz (1966). A study of the error probability performance of the suboptimum receiver in the presence of noisy reference signals is also conducted.
    Schlagwort(e): COMMUNICATIONS
    Materialart: IEEE Transactions on Communications; COM-20; Oct 1972
    Format: text
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  • 6
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    Carrier synchronization and detection of polyphase signals. (1972)
    In:  Other Sources
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    Publikationsdatum: 2019-06-27
    Beschreibung: Digital communication networks used for the distribution of high-speed digital information are currently the subject of design studies for many civil and military applications. This paper presents results that are useful in such studies as well as in network planning. In particular, the paper is concerned with the problems of carrier synchronization and noisy reference detection of polyphase signals. Reconstruction of coherent references for the detection of polyphase signals is considered and analyzed for three carrier reconstruction loops, namely, Nth power (multiply-and-divide) loops, generalized Costas (I-Q) loops, and extensions of data-aided (modulation wipeoff) loops. General expressions for the error probability are developed when the reconstructed reference signals are noisy.
    Schlagwort(e): COMMUNICATIONS
    Format: text
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  • 7
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    Hexagonal multiple phase-and-amplitude-shift-keyed signal sets (1973)
    In:  Other Sources
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    Publikationsdatum: 2019-06-27
    Beschreibung: Selection of a particular signal set array for a bandwidth-constrained multiple phase-and-amplitude-shift-keyed (MPASK) communication system for a linear additive Gaussian noise channel requires consideration of factors such as average and/or peak power vs symbol error probability, signal amplitude dynamic range, simplicity of generation and detection, and number of bit errors per symbol error (Gray code properties). A simple technique is presented for generating and optimally detecting the honeycomb (hexagonal) signal set, i.e., the signal set that has the tightest sphere-packing properties. The symbol and bit error probability performance of this set is compared to other two-dimensional signal sets that have been investigated in the literature, and is shown to be slightly superior from an average power standpoint. The paper concludes with a comparison of all of these signal sets from the standpoint of the factors listed above.
    Schlagwort(e): COMMUNICATIONS
    Materialart: IEEE Transactions on Communications; COM-21; Oct. 197
    Format: text
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  • 8
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    The effect of loop stress on the performance of phase-coherent communication systems (1970)
    In:  Other Sources
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    Publikationsdatum: 2019-06-27
    Beschreibung: Phase-coherent communication systems with phase locked loops for data detector synchronization, calculating noisy timing effects on detection efficiency
    Schlagwort(e): COMMUNICATIONS
    Materialart: ; YAL SOCIETY (
    Format: text
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  • 9
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    A hex on MPASK. (1973)
    In:  Other Sources
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    Publikationsdatum: 2019-07-13
    Beschreibung: A class of multiple-phase amplitude-shift-keying (MPASK) signal sets based upon a hexagonal design is presented. The sets give slightly improved error probability performance over any other MPASK set thus far reported in the literature. The hexagonal signal set designs presented are motivated by a sphere-packing argument. Gray codes for binary data are considered, giving attention to questions regarding the 'best' impure Gray code that can be constructed for hexagonal signal sets.
    Schlagwort(e): COMMUNICATIONS
    Materialart: International Conference on Communications; Jun 11, 1973 - Jun 13, 1973; Seattle, WA
    Format: text
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  • 10
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    The performance of a noncoherent FSK receiver preceded by a bandpass limiter. (1972)
    In:  Other Sources
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    Publikationsdatum: 2019-06-27
    Beschreibung: Many applications of the bandpass limiter involve either coherent or noncoherent demodulation following the limiter. In this paper we study the performance of a noncoherent frequency-shift keying (FSK) receiver when it is preceded by a bandpass limiter. In particular, we obtain expressions for signal suppression factor, output signal-to-noise ratio (SNR), and error probability from which one can assess the degradation in performance of the receiver due to the presence of the limiter.
    Schlagwort(e): COMMUNICATIONS
    Materialart: IEEE Transactions on Communications; COM-20; Dec. 197
    Format: text
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