Receiver-transmitter pair selection in MIMO phased array radar
Hamed Nosrati, Elias Aboutanios, David B. Smith
Abstract
The increase in the number of degrees of freedoms (DoF) that is afforded by multiple-input-multiple-output (MIMO) phased arrays is accompanied by an increase in hardware and computational costs. We mitigate this problem in a collocated MIMO phased array system by employing a selection strategy where a subset of K transmitter-receiver (Tx-Rx) pairs is chosen from the availableN pairs. We formulate the selection task as an optimization problem using the spatial correlation coefficient (SCC). Minimizing the SCC leads to an increase in the orthogonality of the signal and interference subspaces. We formulate and solve both the joint Tx-Rx selection problem and factored selection where the Tx and Rx are decoupled and treated separately. We show that both approaches can achieve excellent trade-off between performance and cost. While the factored problem compromises performance with respect to the joint Tx-Rx selection, it allows for better transmit power efficiency, thus increasing the received signal-to-noise ratio.
BibTeX
@inproceedings{icassp2017_receivertransmit,
title = {Receiver-transmitter pair selection in MIMO phased array radar},
author = {Hamed Nosrati and Elias Aboutanios and David B. Smith},
booktitle = {ICASSP 2017},
year = {2017}
}