Digital signal processing techniques applied to mobile radio channel sounding

Fannin, P.C.; Molina, Ana María Anguiano; Swords, S. S.; Cullen, P.J.

doi:10.1049/ip-f-2.1991.0066

Cited by 22 publications

(14 citation statements)

References 4 publications

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“…Instead, most practical channel sounders [29]- [31] transmit a general pulse-train sounding signal (9) where the transmit pulse is chosen such that has a low crest factor. The received signal is then passed through a receive filter in order to achieve pulse compression.…”

Section: B Correlative Channel Soundingmentioning

confidence: 99%

See 1 more Smart Citation

Unbiased Scattering Function Estimators for Underspread Channels and Extension to Data-Driven Operation

Artes

Matz

Hlawatsch

2004

IEEE Trans. Signal Process.

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Abstract-We propose two methods for the estimation of scattering functions of random time-varying channels. In contrast to existing methods, our methods exploit the underspread property of these channels to achieve good estimation performance and low computational complexity. The first method uses a dedicated sounding to measure the channel. The second method uses the data signal of an ongoing data transmission as sounding signal and thus allows estimation without dedicated sounding. Both methods are effectively unbiased and can be implemented efficiently using the Zak transform. The performance of our scattering function estimators is studied both analytically by means of variance bounds and experimentally through numerical simulation, and their superiority over existing methods is demonstrated.

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Section: B Correlative Channel Soundingmentioning

confidence: 99%

“…1). The output signal of the resulting matched receive filterbank is (29) with the filtered and windowed noise Because the windows approximately pass the "signal" components , we obtain with the virtual sounding signal…”

Section: A Data-driven Channel Soundingmentioning

confidence: 99%

Unbiased Scattering Function Estimators for Underspread Channels and Extension to Data-Driven Operation

Artes

Matz

Hlawatsch

2004

IEEE Trans. Signal Process.

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“…Rather than performing the RX sampled signal correlation in the time domain, it is common and more computationally efficient to perform the correlation in the frequency domain [10,11,12], then returning the result to the time domain. The well-known Fast Fourier Transform circular convolution (matched filter) approach employed in the CSR is described in Equation (2).…”

Section: Correlation Technique In Channel Sounding Receivermentioning

confidence: 99%

“…Data from the RTL-SDR (set to its maximum IF gain of 49dB) holding 32 captured PRBS frames are first stored to file and then processed in Python, leading to graphs of channel impulse and frequency response. The algorithm employed within the CSR is based on a simplified version of those used in [10,11,12]. In the following descriptions, variables holding arrays of samples are italicised and in bold.…”

Section: Correlation Technique In Channel Sounding Receivermentioning

confidence: 99%

Portable and Low Cost Channel Sounding Platform for VHF / UHF IoT Propagation Research

Ball

2017

Loughborough Antennas &Amp; Propagation Conference (LAPC 2017)

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This paper presents work into realising a cost-effective and portable platform to support Internet of Things (IoT) propagation research at VHF and UHF. The sounding receiver uses a low cost RTL-SDR, Raspberry Pi and touchscreen. The platform runs dedicated channel sounding DSP algorithms written in Python. The resulting platform is a portable and convenient propagation measurement tool, covering 27MHz to 1.7GHz. Initial results from a city measurement campaign at 71MHz and 869.525MHz are presented, showing channel response and interference.

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“…Popular types of channel sounders are pseudo-noise sequence correlation sounders, swept time-delay cross-correlation sounders, and chirp sounders (Cullen, Fannin, & Molina, 1993;Fannin, Molina, Swords, & Cullen, 1991;Parsons, Demery, & Turkmani, 1991). Popular types of channel sounders are pseudo-noise sequence correlation sounders, swept time-delay cross-correlation sounders, and chirp sounders (Cullen, Fannin, & Molina, 1993;Fannin, Molina, Swords, & Cullen, 1991;Parsons, Demery, & Turkmani, 1991).…”

Section: Spread-spectrum-like Channel Soundingmentioning

confidence: 99%