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Communications, IEEE Transactions on

Issue 1 • Date Jan 1989

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Displaying Results 1 - 13 of 13
  • Performance analysis of an asymptotically quantum-limited optical DPSK receiver

    Publication Year: 1989 , Page(s): 46 - 51
    Cited by:  Papers (5)
    Request Permissions | Click to expandAbstract | PDF file iconPDF (528 KB)  

    An optical, direct-detection differential phase-shift keying (DPSK) receiver whose error probability is quantum-limited as the transmitting laser linewidth vanishes is analyzed. The receiver design is based on a binary equiprobable hypothesis test with doubly stochastic point process observations, the conditional random rates of which depend on the transmitting laser phase noise, which is modeled ... View full abstract»

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  • On the symbol error probability of maximum-selection diversity reception schemes over a Rayleigh fading channel

    Publication Year: 1989 , Page(s): 79 - 83
    Cited by:  Papers (50)
    Request Permissions | Click to expandAbstract | PDF file iconPDF (448 KB)  

    The symbol error probability of two selection schemes, namely, maximum signal-to-noise ratio (Mγ) selection and maximum output (MO) selection, for M-ary multidiversity reception over a Rayleigh fading channel are discussed. The symbol error probability of the MO scheme is lower than that of the Mγ scheme. The more diversity receptions that are used, the large... View full abstract»

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  • A comparison of SSB-SC and conventional AM under a peak power limitation

    Publication Year: 1989 , Page(s): 1 - 5
    Request Permissions | Click to expandAbstract | PDF file iconPDF (280 KB)  

    Single-sideband (SSB) and AM signals are analyzed using a waveform that can be varied in shape from a spike through a sine wave to a square wave by varying a parameter. The average sideband powers and the peak envelope powers are then calculated and compared. It is shown that the ratio of average sideband power to peak envelope power for AM is more favorable than that for SSB for `squarish' modula... View full abstract»

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  • One-stage one-sided rearrangeable switching networks

    Publication Year: 1989 , Page(s): 52 - 56
    Cited by:  Papers (3)
    Request Permissions | Click to expandAbstract | PDF file iconPDF (468 KB)  

    Switching networks consisting of subscriber lines and crosswires connected by switches are considered. A connection between two subscribers is made along one crosswire via two switches. The minimum number of switches necessary for such a switching network to be rearrangeably nonblocking is determined and a switching arrangement which achieves this minimum for any (even) number of subscriber lines ... View full abstract»

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  • About loss probabilities for general routing policies in circuit-switched networks

    Publication Year: 1989 , Page(s): 57 - 59
    Cited by:  Papers (3)
    Request Permissions | Click to expandAbstract | PDF file iconPDF (232 KB)  

    A relationship between the intensities of offered traffic and loss probabilities in a circuit-switched network with general routing policies is derived from Markovian analysis. This relation was first derived in the sample overflow case, i.e., primary trunk-groups overflowing on to a secondary trunk group View full abstract»

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  • Theoretical studies on the performance of lossy photon channels

    Publication Year: 1989 , Page(s): 39 - 45
    Cited by:  Papers (2)
    Request Permissions | Click to expandAbstract | PDF file iconPDF (528 KB)  

    The effect of channel losses on the capacity of noiseless optical communication systems utilizing the number state is studied. Based on these findings, the photon efficiency of these systems is evaluated in the presence of losses. Then, by comparing the photon efficiency of the number-state pulse-position modulation (PPM) and the coherent-state PPM under certain realistic conditions, it is found t... View full abstract»

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  • Performance of binary FSK communications over frequency-selective Rayleigh fading channels

    Publication Year: 1989 , Page(s): 83 - 89
    Cited by:  Papers (9)  |  Patents (1)
    Request Permissions | Click to expandAbstract | PDF file iconPDF (504 KB)  

    The performance of binary frequency-shift-keyed communications over frequency-selective wide-sense-stationary uncorrelated-scattering Rayleigh fading channels is discussed. Previous analyses of FSK communications over frequency-selective channels have considered the average probability of error for specific models for the fading channel and typically assume that the two FSK signals are orthogonal.... View full abstract»

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  • Modeling an asynchronous data echo canceller

    Publication Year: 1989 , Page(s): 75 - 79
    Cited by:  Papers (1)
    Request Permissions | Click to expandAbstract | PDF file iconPDF (420 KB)  

    It is shown that an adaptive echo canceller with asynchronous inputs affected by sampling time jitter can be modeled as the identification of a time-varying channel by an adaptive filter, both the channel and the adaptive filter being fed with synchronous data. This allows application of theoretical results of the identification problem which are already known. It is proved that the problem is sim... View full abstract»

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  • Performance of a broadcast packet switch

    Publication Year: 1989 , Page(s): 60 - 69
    Cited by:  Papers (43)  |  Patents (2)
    Request Permissions | Click to expandAbstract | PDF file iconPDF (872 KB)  

    The results of a simulation study undertaken to evaluate a high-performance packet-switching fabric supporting point-to-point and multipoint communications are presented. This switching fabric contains several components, each based on conventional binary routing networks. The most novel element is the copy network, which performs the packet replication needed for multipoint connections. Results c... View full abstract»

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  • Local access radio interference due to building reflections

    Publication Year: 1989 , Page(s): 70 - 74
    Cited by:  Papers (9)
    Request Permissions | Click to expandAbstract | PDF file iconPDF (456 KB)  

    A computer simulation for studying the interference effects of building reflections on the system performance of local access radio (LAR) is described. The simulation is based upon geometric optics. Coverage probability, defined as the fraction of subscriber locations that can be served by radio within a given range, is calculated. It is shown that only half of the potential subscriber sites withi... View full abstract»

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  • TDM policies in multistation packet radio networks

    Publication Year: 1989 , Page(s): 31 - 38
    Cited by:  Papers (9)
    Request Permissions | Click to expandAbstract | PDF file iconPDF (728 KB)  

    A multistation packet radio network with m stations and a finite number of nodes n that uses a conflict-free protocol to access the backbone network of stations through a shared channel is discussed. The goal is to derive an allocation of the channel time slots (time-division multiplexing cycle), so that all transmissions will be conflict-free and some measure of performance (e.g... View full abstract»

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  • A comparison of protocols for a meteor-burst channel based on time-varying channel model

    Publication Year: 1989 , Page(s): 18 - 30
    Cited by:  Papers (22)
    Request Permissions | Click to expandAbstract | PDF file iconPDF (916 KB)  

    The performance of a meteor-burst (MB) communication system using three different protocols is examined. The protocols were chosen to study the relative advantages of using a simple stop-and-wait automatic repeat request (ARQ) scheme as well as the ability to sense the presence of a channel. It was found that for long messages, the use of the ARQ scheme gave significant performance improvement; ho... View full abstract»

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  • Performance of a meteor-burst communication system using packet messages with variable data rates

    Publication Year: 1989 , Page(s): 6 - 17
    Cited by:  Papers (15)  |  Patents (2)
    Request Permissions | Click to expandAbstract | PDF file iconPDF (800 KB)  

    The transmitted data rate is a function of the channel state and is varied in such a way as to keep the probability of bit error approximately constant. The performance measure of the system is the probability of successful message completion in a given time span TD. Optimum operational signal-to-noise ratios are found as well as practical limits on the maximum and minimum transmission ... View full abstract»

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Aims & Scope

IEEE Transactions on Communications focuses on all telecommunications including telephone, telegraphy, facsimile, and point-to-point television by electromagnetic propagation.

 

 

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Editor-in-Chief
Robert Schober
University of British Columbia