A receiver architecture for dual-functional massive MIMO OFDM radcom systems

Date

2020-06-01

Author

Temiz, Murat
Alsusa, Emad
Danoon, Laith

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This study introduces a receiver architecture for dual-functional communication and radar (RadCom) base-stations (BS), which exploits the spatial diversity between the received radar and communication signals, and performs interference cancellation (IC) to successfully separate these signals. In the RadCom system under consideration, both communication and radar systems employ orthogonal frequency-division multiplexing (OFDM) waveforms with overlapping subcarriers. Employing OFDM waveform allows the BS to simultaneously perform uplink channel estimation on the narrow-band subcarriers to efficiently obtain full channel state information (CSI) between the users (UEs) and the BS antenna elements. The estimated CSI matrix is then utilized to acquire uplink data streams from the UEs by suppressing the inter-user interference and radar signals which arrive at the BS through unknown channels. After acquiring the UEs' data, radar signals are extracted from the received complex baseband signals by performing interference cancellation. The proposed method has been analyzed mathematically and verified by simulations under various conditions including CSI mismatch and high radar interference. The results show that 16QAM modulated uplink is outstandingly robust against radar interference and that having a large number of antennas significantly improves the performance of both communication and radar subsystems, cooperatively. This study shows that it is possible to distinguish radar and communication signals by employing large-scale antenna arrays to successfully realize a RadCom receiver for future communication networks.

Subject Keywords

Massive MIMO, MIMO OFDM Radar, RadCom Receiver, Successive Interference Cancellation

URI

https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85090275599&origin=inward
https://hdl.handle.net/11511/105790

DOI

https://doi.org/10.1109/iccworkshops49005.2020.9145285

Conference Name

2020 IEEE International Conference on Communications Workshops, ICC Workshops 2020

Collections

Department of Electrical and Electronics Engineering, Conference / Seminar

Citation Formats

M. Temiz, E. Alsusa, and L. Danoon, “A receiver architecture for dual-functional massive MIMO OFDM radcom systems,” presented at the 2020 IEEE International Conference on Communications Workshops, ICC Workshops 2020, Dublin, İrlanda, 2020, Accessed: 00, 2023. [Online]. Available: https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85090275599&origin=inward.