IEEE Communications Letters

Issue 11 • Nov. 1998

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Displaying Results 1 - 6 of 6
  • Tight error bounds for asynchronous multicarrier CDMA and their application

    Publication Year: 1998, Page(s):295 - 297
    Cited by:  Papers (7)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (103 KB)

    Upper and lower bounds on the average bit error rate for binary phase-shift keying (BPSK), asynchronous multicarrier (MC)-CDMA communications using coherent detection are derived. The bounds can be made very tight by adjusting a parameter in the computation and this is demonstrated by numerical examples. Based on the derived bounds it is shown by numerical examples that the performance of asynchro... View full abstract»

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  • Capacity of DS/CDMA communication systems with optimum spectral overlap

    Publication Year: 1998, Page(s):298 - 300
    Cited by:  Papers (7)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (118 KB)

    We consider frequency overlapped DS/CDMA (FO/CDMA) communication systems where a number of DS/CDMA systems share frequency bands with adjacent systems. We analyze the multiple-access interference from adjacent systems with arbitrary amount of frequency overlap and compare the capacity of FO/CDMA with that of single wideband CDMA (WCDMA). The optimum amount of overlap increases with the number of o... View full abstract»

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  • A link control scheme using self-reflecting signal in global beam satellite network

    Publication Year: 1998, Page(s):301 - 303
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (127 KB)

    In this letter, we show that we can improve the existing go-back-N automatic repeat request (ARQ) in satellite communication by using a self-reflecting signal from the satellite. We also provide the analyses of the existing go-back-N ARQ and our scheme. In our scheme, we use a self-reflecting signal from the satellite in order to investigate whether the transmitting frame experiences errors or not... View full abstract»

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  • Improving idle handoff in CDMA mobile systems

    Publication Year: 1998, Page(s):304 - 306
    Cited by:  Papers (1)  |  Patents (8)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (75 KB)

    In this letter, we have developed an efficient idle handoff technique, starting from field-test results obtained with the method used in present CDMA mobile phones, where the handoff is performed when a new pilot rises over the current one by a predefined constant. Unlike the conventional method, the proposed method decides the handoff based on a variable threshold, the value of which is automatic... View full abstract»

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  • Blind estimation of output labels of SIMO channels based on a novel clustering algorithm

    Publication Year: 1998, Page(s):307 - 309
    Cited by:  Patents (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (79 KB)

    This paper addresses the problem of data detection for digital communications employing space diversity reception, where the system model contains a single-input multiple-output (SIMO) vector channel. The received vector corrupted by additive white Gaussian noise (AWGN) is modeled as the noisy output of a finite state vector Markov source. Subsequently, a discretely valued basis of minimal dimensi... View full abstract»

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  • Noncoherent equalization of GMSK using complex receiver structures

    Publication Year: 1998, Page(s):310 - 312
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (95 KB)

    In this letter, the performance of the HIPERLAN system in an indoor multipath fading channel is considered. Due to the high carrier frequency and high data rate, a simple noncoherent demodulator followed by a nonlinear equalizer, which includes a RAM and a Viterbi decoder, is proposed to cope with intersymbol interference. The novelty of the proposed equalizer is that a complex noncoherent signal ... View full abstract»

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IEEE Communications Letters publishes letters on the frontiers of research within the field of interest of the IEEE Communications Society in a timely manner.

 

 

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Octavia Dobre
Memorial University, Canada