An overview of ultra wide band indoor channel measurements and modeling

Irahhauten, Z.; Nikookar, H.; Janssen, G. C. A. M.

doi:10.1109/lmwc.2004.832620

Cited by 92 publications

(61 citation statements)

References 13 publications

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“…Moreover, a distinct wideband model, considering the bandwidth, for each sub-band in UWB is proposed in (8). The above-mentioned frequency-dependency has been verified by the measurements in different ways.…”

Section: Frequency Selectivity 711 Transfer Function Characterizationmentioning

confidence: 78%

See 1 more Smart Citation

Ultra-Wideband (UWB) Communications Channel – Theory and Measurements

Ahmadi‐Shokouh¹,

Qiu²

2011

Ultra Wideband Communications: Novel Trends - Antennas and Propagation

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Section: Frequency Selectivity 711 Transfer Function Characterizationmentioning

confidence: 78%

“…To account for frequency-dependent electromagnetic behavior of scatterers, (1) is generalized in (8) to:…”

Section: Frequency Selectivity 711 Transfer Function Characterizationmentioning

confidence: 99%

Ultra-Wideband (UWB) Communications Channel – Theory and Measurements

Ahmadi‐Shokouh¹,

Qiu²

2011

Ultra Wideband Communications: Novel Trends - Antennas and Propagation

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“…Nevertheless, this ambiguity will not affect the receiver error performance when the estimated channel is used in subsequent signal detection. Even so, a possible strategy to alleviate this frame-level timing offset estimation ambiguity is to select T f to be as close to the channel delay spread τ L−1,0 as possible, assuming that τ L−1,0 is known accurately to the receiver (possibly through channel sounding [13]). This choice will not only improve the transmission rate but also reduce the chances that + τ L−1,0 ≤ T f for an unknown random offset…”

Section: Da Low-complexity Maximum-likelihood (Lc-ml) Timing Acqmentioning

confidence: 99%

Low-complexity ML timing acquisition for UWB communications in dense multipath channels

Tian

Lottici²

2005

IEEE Trans. Wireless Commun.

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Abstract-Timing acquisition for ultrawideband (UWB) communication systems operating in dense multipath environments faces major challenges due to the stringent requirements to resolve and capture ultrashort transmitted pulses. This paper develops low-complexity maximum-likelihood (LC-ML) acquisition methods that offer explicit design options to trade off acquisition accuracy and complexity. The proposed schemes are based on a tapped delay line (TDL) model whose tap spacing is set in accordance with a low frame-level rate. By avoiding subpulse rate sampling, the LC-ML methods achieve low complexity and fast acquisition speed and at the same time retain good estimation accuracy due to the underlying ML principle. Both the data-aided (DA) and nondataaided (NDA) versions are derived. It is also demonstrated by simulations that the proposed synchronizers are markedly robust with respect to the effects of both multipath channel and multiple access interference.

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“…The massive test results on the multipath propagation characteristics of radio signal at indoor and outdoor show that if a transmission terminal transmits a pulse signal through multipath channel, its reception terminal may receive several pulse signals [1][2][3][4][5][6]. The delay-spread of each pulse and the number of pulses are all different; the delay-spread causes the narrowing down of the relevant bandwidth of a channel.…”

Section: Introductionmentioning

confidence: 99%

A Synchronous Wideband Frequency-Domain Method for Long-Distance Channel Measurement

Hu¹,

Zhou²,

Guo³

2013

PIER

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Abstract-This paper proposes a novel synchronous wideband frequency domain method for measuring time domain response of longdistance channel. Its core consists of: (1) baseband signal generators at the transmission terminal and the reception terminal respectively are used to generate the wideband signal of the same frequency; (2) the two GPS clock frequency reference sources locked on the same satellite are used to yield the high-stability 10 MHz signal as the external reference source of the baseband signal generator so that the initial phases of the wideband signals are basically the same; (3) the pulse per second (PPS) signal generated by the GPS clock frequency reference source is used as trigger signal to ensure that the baseband signal generator and the vector network analyzer (VNA) can transmit and receive signals synchronously; (4) the time domain response of the channel is indirectly obtained through the inverse Fourier transform of amplitude and phase of the frequency domain response. To verify the measurement method, experiments were performed, in which the sea surface evaporation waveguide which is tens of kilometers apart from each other was selected as the channel. The experimental results, given in Figs. 4 and 5, and their analysis show that the measurement method can obtain amplitude and phase of the signal whose band is hundreds of MHz and whose equivalent pulse width reaches 5 ns. The measurement method is used to obtain the time domain response of the long-distance channel, verifying that the measurement method is effective.

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An overview of ultra wide band indoor channel measurements and modeling

Cited by 92 publications

References 13 publications

Ultra-Wideband (UWB) Communications Channel – Theory and Measurements

Ultra-Wideband (UWB) Communications Channel – Theory and Measurements

Low-complexity ML timing acquisition for UWB communications in dense multipath channels

A Synchronous Wideband Frequency-Domain Method for Long-Distance Channel Measurement

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