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IEEE 2002 International Conference on Communications, Circuits and Systems and West Sino Expositions

June 29 2002-July 1 2002

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  • IEEE 2002 International Conference on Communications, Circuits and Systems and West Sino Expositions Proceedings [front matter]

    Publication Year: 2002, Page(s):0_1 - xlii
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  • Discussion of SNR after sub-sampling of multiple bandpass signals

    Publication Year: 2002, Page(s):944 - 948 vol.2
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    Freely Available from IEEE
  • Author index

    Publication Year: 2002, Page(s):1789 - 1796
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  • Optimum transmission beamforming on phase-only antenna arrays

    Publication Year: 2002, Page(s):1041 - 1044 vol.2
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (322 KB) | HTML iconHTML

    The objective of optimum adaptive transmission beamforming on linear isotropic phase-only antenna arrays is to maximize the pointing directional gain with the constraints of phase-only control at the antenna elements and the imposition of s in the interference directions. A suitable cost function stemming from the interference ing constraints and phase-only control is constructed, equivalent to th... View full abstract»

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  • A new family of carrier lock detectors and Es/N0 estimators for M-PSK receivers

    Publication Year: 2002, Page(s):1034 - 1040 vol.2
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (439 KB) | HTML iconHTML

    A family of carrier lock detectors for M-PSK receivers operating in AWGN channels is suggested. The statistical properties of the lock detectors are derived theoretically, using stochastic analysis, and computer simulations are used to validate the results obtained. The derivations reveal two useful attributes of the lock detectors: 1) they are self-normalizing (or, in other words, signal-level in... View full abstract»

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  • Frequency and DOA estimation of LFM in fractional Fourier domain

    Publication Year: 2002, Page(s):1029 - 1033 vol.2
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (278 KB) | HTML iconHTML

    The main aim the paper is to study a method for intercepting and processing one type of nonstationary signal - a linear frequency modulation (LFM) signal, bring forward a method for estimating the frequency of the LFM signal and put forward an algorithm to estimate the 2D DOA based on a MUSIC algorithm. View full abstract»

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  • Direction-of-arrival estimation of wideband chirp signals using the Wigner distribution of symmetrical sensor array

    Publication Year: 2002, Page(s):1025 - 1028 vol.2
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (273 KB) | HTML iconHTML

    Recently, time-frequency techniques have been successfully applied in narrowband direction-of-arrival (DOA) estimation (see Amin, M.G., 1999; Belouchrani, A. and Amin, M.G., 1999; Zhang, Y. et al., 2001; 2000). A novel time-frequency approach to direction finding of wideband chirp signals is proposed. Our technique employs the Wigner-Ville distribution (WVD) of a symmetrical sensor array to get di... View full abstract»

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  • A new approach to adaptive blind MMSE multiuser detection

    Publication Year: 2002, Page(s):894 - 898 vol.2
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (412 KB) | HTML iconHTML

    A new adaptive blind multiuser detector is proposed. The algorithm is founded on minimizing the mean squared error (MSE) but does not require training sequences, and converges to the minimum MSE (MMSE) detector. Like the blind minimum-output-energy (MOE) detector, the proposed detector requires only the signature waveform and timing of the user of interest. We show that the blind MMSE and MOE dete... View full abstract»

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  • Optimal transform for colored noise suppression

    Publication Year: 2002, Page(s):939 - 943 vol.2
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (305 KB) | HTML iconHTML

    There has been interest in the application of filter banks and transforms to noise suppression. Recently, Akkarakaran and Vaidyanathan (2001) showed that when the noise is white, the optimal transform (not necessary unitary) for noise suppression is the Karhunen-Loeve transform (KLT). Moreover they showed that for the case of colored noise, if both the noise and signal have a common KLT, then the ... View full abstract»

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  • Performance analysis for joint estimation of frequency, 2D AOA and polarization under array error

    Publication Year: 2002, Page(s):1021 - 1024 vol.2
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (278 KB) | HTML iconHTML

    The paper constructs an array error model of joint frequency, 2D AOA and polarization estimation, analyzes the parameter estimation performance of the algorithm based on theoretical conditions under array error, and deduces the mean-square error (MSE) of frequency, 2D AOA and the polarizations. By computer simulation we can see that the theoretical results and the simulation results are similar. View full abstract»

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  • Real-time experimental research on the similarity of room acoustic paths for audio blind signal separation

    Publication Year: 2002, Page(s):890 - 893 vol.2
    Cited by:  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (335 KB) | HTML iconHTML

    The similarity of two room impulse responses (RIR) from a source to two sensors is defined and researched via a real-time room acoustic measurement system. The experimental results show that, the closer the two sensors are, the more similar the two RIRs are, and thus the fewer parameters are needed to describe the difference (DRIR) between the two RIRs. Aiming at reducing the computational complex... View full abstract»

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  • A real-time demodulation algorithm for FSK signals in railway tracks and its implementation

    Publication Year: 2002, Page(s):935 - 938 vol.2
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (293 KB) | HTML iconHTML

    A new demodulation method is developed for frequency-shift key (FSK) signals in railway tracks. Because of the harsh electrical environment, strong background noises are usually found in the sampled FSK signals. Based upon a zoom fast Fourier transform (ZFFT) algorithm, the segmented data blocks are used in an overlapping way for further processing. Theoretical analysis shows that, by using the al... View full abstract»

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  • 2D AOA estimation of multiple wide-band FM sources based on spatial time-frequency distributions

    Publication Year: 2002, Page(s):1017 - 1020 vol.2
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (290 KB) | HTML iconHTML

    A novel 2D angle-of-arrival (AOA) estimation technique for multiple wide-band FM sources is developed. Based on an L-shaped array, the proposed method employs spatial time-frequency distributions (STFD) in conjunction with a coherent signal-subspace (CSS) processing technique to estimate the direction cosines. CSS processing is achieved by using a unitary constraint interpolation technique over mu... View full abstract»

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  • A new supply approach for a DC-DC control circuit

    Publication Year: 2002, Page(s):1733 - 1735 vol.2
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    A new supply approach of a DC-DC control circuit is proposed in this paper. Using this new approach, the control circuit energy is provided by the magnetic leakage energy. Operation states of the converter have been analyzed and parameters of components are given. View full abstract»

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  • A system analysis approach for protocol test

    Publication Year: 2002, Page(s):1356 - 1360 vol.2
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (380 KB) | HTML iconHTML

    Systems analysis possesses mature theories and methods. The concepts, models and methods are introduced into the study of the protocol test. The transfer function of the protocol is defined. The system model of the protocol and the protocol stack are presented. The features and abilities of the test methods are analyzed with this approach. The test suite is designed and organized accordingly. All ... View full abstract»

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  • Channel estimation of DMB-T

    Publication Year: 2002, Page(s):1069 - 1072 vol.2
    Cited by:  Papers (13)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (322 KB) | HTML iconHTML

    A proposed new standard for Chinese DTV is called digital terrestrial multimedia broadcasting (DMB-T). The paper investigates the channel estimation technique of DMB-T. The channel impulse response is obtained by measuring the correlation between the received PN sequence and the locally generated PN sequence. Channel compensation is done in the frequency domain afterwards. View full abstract»

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  • An algorithm for blind adaptive multiuser detection based on hidden Markov models

    Publication Year: 2002, Page(s):885 - 889 vol.2
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (343 KB) | HTML iconHTML

    The problem of constructing a blind adaptive multiuser detector (MUD) is considered for direct sequence code division multiple access signals transmitted through multipath channels. Due to the slow speed of convergence of channel estimation and existent unreason in state estimation in statistical algorithm based blind adaptive multiuser detection, hidden Markov model theory is proposed as the basi... View full abstract»

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  • Small signal analysis of boost converter utilizing V2 control technique

    Publication Year: 2002, Page(s):1711 - 1715 vol.2
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (286 KB) | HTML iconHTML

    V2 control technique of switching power converter is presented and analyzed in this paper. The small signal model and open-loop small signal transfer function of V2 controlled switching power converters have been studied. As the example, the small signal performance analysis of V2 controlled boost converter was performed. View full abstract»

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  • Analog circuit for sound localization applications

    Publication Year: 2002, Page(s):931 - 934 vol.2
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (327 KB) | HTML iconHTML

    We describe an analog CMOS circuit that computes the time (phase) delay between two 10 kHz sinusoids. This circuit can be used in sound localization applications. We realize a locking range of 10-170 degrees in less than 1 ms that is robust over process variations. Two receivers placed at a distance from one another intercept a sinusoidal waveform emanating from a sound source. The phase differenc... View full abstract»

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  • Performance study of 2D DOA estimation using UCA with five sensors

    Publication Year: 2002, Page(s):1012 - 1016 vol.2
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (362 KB) | HTML iconHTML

    The paper is concerned with the investigation of the 2D direction-of-arrival (DOA) (azimuth and elevation) estimation using a two-dimensional array of sensors in radio DF systems. The 2D interferometry DOA estimation algorithm for a five sensor uniform circular array (UCA) is addressed. Methods to resolve ambiguities in DOA estimation with a large aperture interferometer are investigated in detail... View full abstract»

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  • The modulation and transfer function analysis of CIC control

    Publication Year: 2002, Page(s):1728 - 1732 vol.2
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (330 KB) | HTML iconHTML

    The assessment of the effects of current signal slopes on the stability of current-injection-control (CIC) converter is presented based on the modulation process analysis. The current loop gain was derived in a unified basis leading to small-signal models describing the modulation process. The combination of modulation process and transfer function analysis explain the instability phenomena exists... View full abstract»

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  • Implementation of a PDA/GPS based development platform and its applications in native education

    Publication Year: 2002, Page(s):1556 - 1560 vol.2
    Cited by:  Papers (6)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (440 KB) | HTML iconHTML

    In order to apply the mobile technology and the information technology for the applications in the learning environment, the PDA, wireless, and the location identification feature provided by GPS are integrated for the development of the GPS/PDA Guide system. By using this system, the guided information can bind with its location automatically. The most important concept of the proposed system is ... View full abstract»

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  • Automatic hardware test system for complex digital systems

    Publication Year: 2002, Page(s):1351 - 1355 vol.2
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (283 KB) | HTML iconHTML

    Traditional automatic hardware testing deals mainly with stateless systems. With the rapidly increasing complexity of digital systems, software is more and more engaged in hardware testing. At present, such testing is still mainly carried out manually by engineers, consuming a lot of time and effort. In this paper, we propose an automatic hardware test system that can substantially save engineers'... View full abstract»

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  • Datapath allocation algorithm for deep submicron VLSI

    Publication Year: 2002, Page(s):1411 - 1414 vol.2
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (297 KB) | HTML iconHTML

    With the feature size of VLSI scaling down, interconnect delays begin to dominate the circuit performance. Typical Top-Down High level synthesis methodology is not suitable to the deep submicron VLSI design any more. We present a novel design methodology of datapath allocation for deep submicron VLSI. After allocation, we obtain not only the datapath netlists, but also the floorplan information. F... View full abstract»

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  • Performance evaluations of 3rd order sigma-delta (Σ - Δ) modulators via ASIC implementation

    Publication Year: 2002, Page(s):1540 - 1542 vol.2
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (262 KB) | HTML iconHTML

    A third-order sigma-delta (Σ - Δ) modulator implementation in a Digital Power Amplifier is presented in this paper. The operation is obtained by using a novel combination of architectural features, proper circuit structure selections, specific clocking strategies, and efficient circuit optimization algorithms. Measurement results from fabricated CMOS chip prototypes show a good match w... View full abstract»

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