Characteristics of Short-Term Phase Noise of MIMO Channel Sounding and Its Effect on Capacity Estimation

2009 ◽  
Vol 58 (1) ◽  
pp. 196-201 ◽  
Author(s):  
A. Taparugssanagorn ◽  
J. Ylitalo
Keyword(s):  
Phase Noise ◽  
Mimo Channel ◽  
Capacity Estimation ◽  
Short Term ◽  
Channel Sounding

scholarly journals JOINT DELAY AND AZIMUTH ESTIMATION OF COHERENT WAVES FOR MILLIMETER-WAVE BAND CHANNEL SOUNDING

2020 ◽  
Vol 10 (1) ◽  
pp. 1-8
Author(s):  
Kentaro Saito ◽  
Ahmad Salaam Mirfananda ◽  
Jun-ichi Takada ◽  
Mitsuki Nakamura ◽  
Wataru Yamada ◽  
...  
Keyword(s):  
Parameter Estimation ◽  
Millimeter Wave ◽  
Mobile Communication ◽  
Channel Modeling ◽  
Cloud Services ◽  
Mimo Channel ◽  
Estimation Accuracy ◽  
Wave Band ◽  
Channel Sounding ◽  
Millimeter Wave Band

The user traffic in the mobile communication area has rapidly increased owing to the widespread of smartphones and various cloud services. To handle the increasing traffic, in the fifth-generation mobile communication system (5G), the millimeter-wave multiple-input and multiple-output (MIMO) communication technology is under development. Because the MIMO transmission performance heavily depends on the radio propagation characteristics, various MIMO channel measurements are needed for the performance evaluation and system design. The accurate and efficient parameter estimation algorithm which estimates the propagation delays and angle of arrivals (AoA) of radio waves is also indispensable for the purpose. In this paper, we extended the joint delay and azimuth estimation (JADE) method based on multiple signal classification (MUSIC) algorithm. In our proposal, the drawback of the MUSIC that the performance degrades for the estimation of coherent waves was solved by applying the smoothing technique in the frequency domain. It also makes the antenna calibration simpler. We implemented the proposed algorithm for the channel sounding system in the 66 GHz band, which is one of the candidate frequency bands for the International Mobile Telecommunications (IMT) system and evaluated the effectiveness through the experiment in an anechoic chamber. The result showed that our proposed method can de-correlate the signal components of coherent waves, and improved the parameter estimation accuracy significantly. The root means square error (RMSE) of the propagation delay estimation was improved from 2.7 ns to 0.9 ns, and the RMSE of the AoA estimation was improved from 20.3 deg. to 7.2 deg. The results are expected to be utilized for the millimeter wave band MIMO channel modeling.

scholarly journals Online capacity estimation of lithium-ion batteries with deep long short-term memory networks

2021 ◽  
Vol 482 ◽  
pp. 228863
Author(s):  
Weihan Li ◽  
Neil Sengupta ◽  
Philipp Dechent ◽  
David Howey ◽  
Anuradha Annaswamy ◽  
...  
Keyword(s):  
Lithium Ion Batteries ◽  
Short Term Memory ◽  
Lithium Ion ◽  
Capacity Estimation ◽  
Short Term ◽  
Term Memory ◽  
Long Short Term Memory

scholarly journals Phase Noise Effects on Wideband Mobile Radio Channel Sounding

2015 ◽  
Vol 14 (2) ◽  
pp. 132-154
Author(s):  
Carlos Eduardo Salles Ferreira ◽  
Gláucio Lima Siqueira ◽  
Raimundo Sampaio Neto
Keyword(s):  
Phase Noise ◽  
Radio Channel ◽  
Mobile Radio ◽  
Channel Sounding ◽  
Noise Effects

scholarly journals A Sub-mW 18-MHz MEMS Oscillator Based on a 98-dBΩ Adjustable Bandwidth Transimpedance Amplifier and a Lamé-Mode Resonator

Sensors ◽  
2019 ◽  
Vol 19 (12) ◽  
pp. 2680
Author(s):  
Anoir Bouchami ◽  
Mohannad Y. Elsayed ◽  
Frederic Nabki
Keyword(s):  
Phase Noise ◽  
Cmos Technology ◽  
High Gain ◽  
Transimpedance Amplifier ◽  
Short Term ◽  
Microelectromechanical System ◽  
Fully Differential ◽  
Mems Oscillator ◽  
Measured Input ◽  
Mode Resonator

This paper presents a microelectromechanical system (MEMS)-based oscillator based on a Lamé-mode capacitive micromachined resonator and a fully differential high-gain transimpedance amplifier (TIA). The proposed TIA is designed using TSMC 65 nm CMOS technology and consumes only 0.9 mA from a 1-V supply. The measured mid-band transimpedance gain is 98 dB Ω and the TIA features an adjustable bandwidth with a maximum bandwidth of 142 MHz for a parasitic capacitance C P of 4 pF. The measured input-referred current noise of the TIA at mid-band is below 15 pA/ Hz . The TIA is connected to a Lamé-mode resonator, and the oscillator performance in terms of phase noise and frequency stability is presented. The measured phase noise under vacuum is −120 dBc/Hz at a 1-kHz offset, while the phase noise floor reaches −127 dBc/Hz. The measured short-term stability of the MEMS-based oscillator is ±0.25 ppm.

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