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Low-Overhead Receiver-side Channel Tracking for mmWave MIMO

Citation Author(s):
Submitted by:
Karthik Upadhya
Last updated:
24 April 2018 - 6:43pm
Document Type:
Poster
Document Year:
2018
Event:
Presenters:
Karthik Upadhya, Sergiy A. Vorobyov, Robert W. Heath, Jr.
Paper Code:
2927
 

Millimeter wave (mmWave) multiple-input multiple-output (MIMO) transceivers employ narrow beams to obtain a large array-gain, rendering them sensitive to changes in the angles of arrival and departure of the paths. Since the singular vectors that span the channel subspace are used to design the precoder and combiner, we propose a method to track the receiver-side channel subspace during data transmission using a separate radio frequency (RF) chain dedicated for channel tracking. Under certain conditions on the transmit precoder, we show that the receiver-side channel subspace can be estimated during data transmission without knowing the structure of the precoder or the transmitted data. The performance of the proposed method is evaluated through simulations.

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