Search Results - "Renfors, M"

Circularity-Based I/Q Imbalance Compensation in Wideband Direct-Conversion Receivers by Anttila, L., Valkama, M., Renfors, M.

“…Communication receivers that utilize I/Q downconversion are troubled by amplitude and phase mismatches between the analog I and Q branches. These mismatches…”
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A Fast Unambiguous Acquisition Algorithm for BOC-Modulated Signals by Benedetto, F., Giunta, G., Lohan, E. S., Renfors, M.

“…This paper proposes a fast unambiguous acquisition technique for binary-offset-carrier (BOC)-modulated signals. We remove the ambiguities (side peaks) of the…”
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Frequency-Selective I/Q Mismatch Calibration of Wideband Direct-Conversion Transmitters by Anttila, L., Valkama, M., Renfors, M.

“…The current trend in building low-cost yet flexible radio transceivers is to use the so-called direct-conversion principle, which is based on complex (I/Q) up-…”
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Advanced methods for I/Q imbalance compensation in communication receivers by Valkama, M., Renfors, M., Koivunen, V.

“…I/Q signal processing is widely utilized in today's communication receivers. However, all I/Q processing receiver structures, such as the low-IF receiver, face…”
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Effective Monitoring of Freeloading User in the Presence of Active User in Cognitive Radio Networks by Benedetto, F., Giunta, G., Guzzon, E., Renfors, M.

“…In cognitive networks, primary and secondary users (PUs and SUs) share the radio resource according to fair regulations. The goal of this paper is to introduce…”
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Biorthogonal exponentially modulated filter bank by Alhava, J., Renfors, M.

“…This paper explores modulated filter banks (MFBs) utilizing polyphase domain analysis. The MFB theory offers a variety of configuration alternatives and to…”
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Digital Compensation of I/Q Imbalance Effects in Space-Time Coded Transmit Diversity Systems by Yaning Zou, Valkama, M., Renfors, M.

“…Space-time coded wireless transmission techniques with multiple transmit and receive antennas can provide considerable increases in both the link quality as…”
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On the Connection of I/Q Imbalance and Channel Equalization in Direct-Conversion Transceivers by Rykaczewski, P., Valkama, M., Renfors, M.

“…Due to its simple structure and reduced requirements for radio frequency filtering, the direct-conversion principle has recently gained a lot of interest in…”
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Blind signal estimation in conjugate signal models with application to I/Q imbalance compensation by Valkama, M., Renfors, M., Koivunen, V.

“…This letter addresses the blind signal estimation problem in the so-called conjugate signal model, where the observed signal is a linear combination of the…”
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Advanced digital signal processing techniques for compensation of nonlinear distortion in wideband multicarrier radio receivers by Valkama, M., Shahed hagh ghadam, A., Anttila, L., Renfors, M.

“…One of the main trends in the evolution of radio receivers and other wireless device is to implement more and more of the receiver functionalities using…”
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Power efficient structure for conversion between arbitrary sampling rates by Babic, D., Renfors, M.

“…This work presents a novel efficient method for conversion between arbitrary sampling rates. The method allows arbitrary number of zeros at multiples of both…”
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Highly efficient techniques for mitigating the effects of multipath propagation in DS-CDMA delay estimation by Lohan, E.S., Hamila, R., Lakhzouri, A., Renfors, M.

“…Delay estimation in direct-sequence code-division multiple-access (DS-CDMA) systems is necessary for accurate code synchronization and for applications such as…”
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Blind Estimation of Large Carrier Frequency Offset in Wireless OFDM Systems by Al-Dweik, A., Hamila, R., Renfors, M.

“…In this paper, a highly efficient blind band-edge filter-based technique is introduced for the estimation of carrier frequency offsets that are much larger…”
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A novel image rejection architecture for quadrature radio receivers by Valkama, M., Renfors, M.

“…In radio communications, a bandpass-to-lowpass transformation is needed to demodulate the received signal down to baseband. One crucial question in this…”
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Pilot spacing in orthogonal frequency division multiplexing systems on practical channels by Rinne, J., Renfors, M.

“…The performance of two different channel interpolation methods to be used with orthogonal frequency division multiplexing systems are investigated. The…”
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Subchip multipath delay estimation for downlink WCDMA system based on Teager-Kaiser operator by Hamila, R., Lohan, E.S., Renfors, M.

“…Accurate detection and estimation of overlapping fading multipath components is vital for many communication systems, particularly for positioning…”
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Polynomial-based maximum-likelihood technique for synchronization in digital receivers by Hamila, R., Vesma, J., Renfors, M.

“…Maximum-likelihood estimation theory provides a general framework for developing near-optimum (with respect to the Cramer-Rao bound) synchronization schemes…”
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Teager energy and the ambiguity function by Hamila, R., Astola, J., Alaya Cheikh, F., Gabbouj, M., Renfors, M.

“…The connection between the Teager energy operator and the ambiguity function is established in this correspondence after defining the Teager operator over…”
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Impulse burst position detection and channel estimation schemes for OFDM systems by Rinne, J., Hazmi, A., Renfors, M.

“…A new method for compensating the effects of impulse noise in OFDM systems has been presented by Rinne, Henriksson and Hazmi (see Proc. 7th International OFDM…”
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Recursive implementation of FIR differentiators with optimum noise attenuation by Vainio, O., Renfors, M., Saramaki, T.

“…We introduce a computationally efficient recursive implementation of digital finite impulse response (FIR) filters for estimating the rate of change or slope…”
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