Results 241 to 250 of about 1,475,822 (289)
An adaptive approach to mitigate the effects of I/Q imbalance and multipath channel
2013 19th Asia-Pacific Conference on Communications (APCC), 2013 It is well known that dual-branch receivers suffer from in-phase (I) and quadrature (Q) imbalance problems resulting in distortion and poor signal quality. This paper presents a novel technique, incorporating adaptive estimation and compensation, to mitigate the combined effects of I/Q imbalance and multipath channel on the received signal.
Khandker Nadya Haq, Kah-Seng Chung
core +3 more sources
Correction and compensation of I/Q imbalance and multipath channel for OFDM receivers
2014 9th International Symposium on Communication Systems, Networks & Digital Sign (CSNDSP), 2014 This paper presents an adaptive scheme in overcoming signal distortion, caused by I/Q imbalance and multipath propagation, in an OFDM receiver. Estimation of I/Q imbalance and channel parameters is performed in the frequency domain with the aid of pilot tones.
Khandker Nadya Haq, Kah-Seng Chung
core +4 more sources
Some of the next articles are maybe not open access.
Related searches:
Related searches:
Enhanced Joint Channel and IQ Imbalance Parameter Estimation for Mobile Communications
IEEE Communications Letters, 2013This letter presents an enhanced joint channel and in-phase and quadrature-phase (IQ) imbalance parameter estimation method for communication systems. The proposed method first estimates the channel impulse response (CIR) with integrated IQ imbalance parameters, which contains twice the number of the original CIR parameters.
Weikun Hou, Ming Jiang 0002
exaly +3 more sources
On the Connection of I/Q Imbalance and Channel Equalization in Direct-Conversion Transceivers
IEEE Transactions on Vehicular Technology, 2008Due to its simple structure and reduced requirements for radio frequency filtering, the direct-conversion principle has recently gained a lot of interest in radio transceiver design. This paper considers the so-called inphase/quadrature (I/Q) imbalance problem in such structures under the assumption of frequency-selective transmission channel requiring
Mikko Erik Valkama +2 more
exaly +3 more sources
Channel Imbalance Effects and Compensation for Doppler Radar Physiological Measurements
IEEE Transactions on Microwave Theory and Techniques, 2015Effects of quadrature channel imbalance on Doppler radar physiological measurements, and new compensation methods, are investigated in this paper. Parametric simulations and experiments were performed to investigate the effects of amplitude imbalance, phase imbalance, and initial phase on Doppler radar obtained pattern, displacement, and rate ...
Ehsan Yavari, Olga Borić-Lubecke
exaly +2 more sources
Co-polarization channel imbalance determination by the use of bare soil
ISPRS Journal of Photogrammetry and Remote Sensing, 2014Abstract This paper describes a novel technique which determines the co-polarization channel imbalance by the use of natural bare soil, instead of a trihedral corner reflector (CR). In polarimetric synthetic aperture radar (PolSAR) remote sensing, the polarimetric calibration (PolCAL) is the key technique in quantitative earth parameter measurement ...
Lei Shi, Pingxiang Li
exaly +2 more sources
The effects of channel imbalances on the azimuth multi-channel SAR
IET Conference Proceedings, 2021Azimuth multi-channel (AMC) synthetic aperture radar (SAR) is an effective technology to conquer the minimum antenna area constraint and can provide high-resolution and wide-swath (HRWS) SAR images compared with the conventional strip-map SAR. In order to suppress azimuth ambiguity, AMC SAR will face an important problem: channel imbalances estimation ...
M. Shang +6 more
openaire +1 more source
On the Impact of Channel Imbalance on MIMO Radar Performance
2020 17th European Radar Conference (EuRAD), 2021The multiple-input multiple-output (MIMO) radar systems suffer from several types of system imperfections such as antenna mutual coupling, channel imbalance, system hardware limitations, and noise. Through calibration the deterministic system imperfections can be significantly reduced.
Ricard L. Grove, Jorgen Dall
openaire +1 more source
Channel Imbalance Calibration Method for Airborne TomoSAR System
IGARSS 2020 - 2020 IEEE International Geoscience and Remote Sensing Symposium, 2020Synthetic aperture radar (SAR) tomography (TomoSAR) systems have been widely used because of its capability of 3D reconstruction of urban area. However, due to the critical requirements of phase and amplitude accuracy, the channel imbalance of the airborne multi-baseline TomoSAR system must be estimated and compensated.
Zekun Jiao +5 more
openaire +1 more source