@conference {16686, title = {A Low-cost andLow-power Single Bit Phased Array at Ka-Band for 5G Applications}, booktitle = {European Microwave week 2019}, year = {Accepted}, author = {Mohammad Hossein Mazaheri Kalahrody and Sadegh and Mostafa Alizadeh and Fakharzadeh and Safieddin Safavi-Naeini} } @conference {15871, title = {Experimental study on the phase analysis of FMCW radar for vital signs detection}, booktitle = {13th European Conference on Antennas and Propagation}, year = {2019}, publisher = {IEEE}, organization = {IEEE}, address = {13th European Conference on Antennas and Propagation}, abstract = {In this work, we address the challenge of the FMCW radar phase analysis known as the phase wrapping. A new solution is proposed based on a recursive phase correction, which does not resort to differentiation or integrations. In addition,
the method is implemented and tested for a subject in order to detect heart and breathing rates in a bedroom environment. On
the other hand, we derive the cardio-respiration waveforms for the subject to demonstrate the feasibility of using the radar for clinical applications.
\ }, author = {Mostafa Alizadeh and George Shaker and Safieddin Safavi-Naeini} } @conference {21053, title = {Low-cost low-power in-vehicle occupant detection with mm-wave FMCW radar}, booktitle = {IEEE Sensor 2019}, year = {2019}, publisher = {IEEE}, organization = {IEEE}, abstract = {In this paper, we use a low-cost low-power mm-wave frequency modulated continuous wave (FMCW) radar for the in-vehicle occupant detection. We propose an algorithm using Capon filter for the joint range-azimuth estimation. Then, the minimum necessary features are extracted to train machine learning classifiers to have reasonable computational complexity while achieving high accuracy. In addition, experiments were carried out in a minivan to detect occupancy of each row using support vector machine (SVM). Finally, our proposed system achieved 97.8\% accuracy on average in finding the defined scenarios. Moreover, the system can correctly identify if the vehicle is occupied or not with 100\% accuracy.
\ }, author = {Mostafa Alizadeh and Hajar Abedi and George Shaker} } @conference {15872, title = {Remote Heart Rate Sensing with mm-wave Radar}, booktitle = { 2018 18th International Symposium on Antenna Technology and Applied Electromagnetics (ANTEM)}, year = {2018}, pages = {1-2}, publisher = {IEEE}, organization = {IEEE}, address = {ANTEM}, abstract = {

There are so many patients who need a continuous vital sign monitoring. Monitoring a patient with a wearable device such as using electrode-based electrocardiography (ECG) signal recording device for a long time is very inconvenient. One possible solution is using contactless sensors such as radars to find vital signs of the subjects. In this paper, we demonstrate the use of frequency-modulated continuous wave (FMCW) radar operating at 77 GHz for monitoring a patient{\textquoteleft}s heart rate in a retirement environment. Several experiments were conducted to validate the reliability of the radar responses. Finally, the whole system is tested in a bedroom with the radar above a bed and a patient lying on it.

}, url = {https://ieeexplore.ieee.org/document/8572982}, author = {Mostafa Alizadeh and George Shaker and Safieddin Safavi-Naeini} } @article {15873, title = {Low-complexity method for primary synchronisation in the third generation partnership project long term evolution downlink system}, journal = {Low-complexity method for primary synchronisation in the third generation partnership project long term evolution downlink system}, volume = {10}, year = {2016}, pages = {1229 - 1235}, abstract = {

In this study, the authors propose a low-complexity method for symbol synchronisation in the third generation partnership project long term evolution (LTE) downlink system. The authors introduce the lowest sampling frequency of a receiver for synchronisation purposes. Using a low sampling frequency at the receiver means that the digital signal is decimated and a lower number of processing samples is needed. This results in reducing the computational complexity. It is also shown that this advantage comes at the cost of signal-to-noise ratio degradation and insertion of a systematic error in synchronisation that can be avoided by choosing a proper decimation factor. A thorough analysis is also conducted for all possible sampling frequencies that reduce the computational complexity of LTE cell search. To show the validity of the authors{\textquoteright} method, they implemented an LTE primary synchroniser in C++ using GNU Radio libraries and prepared a software-based radio modem, tested in different conditions. Some Monte-Carlo simulations are carried out to compare the proposed method with other low-complexity methods. These comparisons show the suggested method is faster than available techniques in literatures.

}, url = {https://ieeexplore.ieee.org/document/7503182}, author = {Faramarz Jabbarvaziri and Mostafa Alizadeh and Abbas Mohammadi and Abdolali Abdipour} } @conference {15874, title = {Subcarrier and Power Allocation with Cognitive Radio Technique in HeterogeneousNetworks for Reducing Interference on Macrocells}, booktitle = {The First International Conference on Signal Processing \& Intelligent systems (SPIS)}, year = {2015}, address = {The First International Conference on Signal Processing \& Intelligent systems (SPIS)}, author = {Mostafa Alizadeh and Mohsen Moosavi and Abbas Mohammadi} }