Abstract:
In-band full-duplex (IBFD) transmission enables simultaneous transmission and reception of signals over the same frequency, thereby doubling spectral efficiency. This tec...Show MoreMetadata
Abstract:
In-band full-duplex (IBFD) transmission enables simultaneous transmission and reception of signals over the same frequency, thereby doubling spectral efficiency. This technique has the potential to be the backbone of next-generation wireless networks. At the same time, a continuous up-scaling of wireless network carrier frequencies arising from ever-increasing data traffic is driving research on integrated sensing and communications (ISAC) systems. This paper considers hitherto unexamined ISAC system comprising IBFD multi-user (MU) multiple-input-multiple-output (MU-MIMO) communications and a distributed MIMO radar. In particular, we propose a transceiver co-design mechanism for a joint distributed MIMO radar and an IBFD MU-MIMO communications system in the presence of a moving radar target. We leverage the relationship between the achievable rate and the weighted minimum mean squared error for the co-designed transceiver. We solve the resulting non-convex optimization using the block coordinate descent algorithm to sequentially obtain the MIMO radar waveform matrix, the downlink, and uplink precoders of the IBFD MU-MIMO, and linear receive filters subject to the power and quality-of-service constraints. Numerical experiments show that our proposed WMMSE-based method for distributed ISAC design achieves monotonic convergence within finite steps with a much-improved signal-to-noise ratio for radar and communications functions.
Date of Conference: 04-08 December 2022
Date Added to IEEE Xplore: 11 January 2023
ISBN Information: