Please use this identifier to cite or link to this item: https://hdl.handle.net/20.500.11851/11784
Title: Performance Analysis for Isac Systems With 1-Bit Dacs
Authors: Salman, Murat Babek
Demir, Özlem Tuğfe
Bjornson, Emil
Keywords: Quantized Precoding
1-Bit Dac
Low-Resolution
Quantization
Isac
Waveform Design
Publisher: IEEE
Series/Report no.: International Symposium on Wireless Communication Systems
Abstract: Low-resolution quantization constrains the maximum achievable gains of multiple-input multiple-output (MIMO) systems. While the adverse effects and mitigation strategies have been thoroughly analyzed for communication systems, the impact of low-resolution quantization on integrated sensing and communication (ISAC) systems remains insufficiently explored in the existing literature. In this paper, we propose an analysis and design framework to investigate and mitigate the effects of 1-bit digital to analog converters (DACs) for ISAC systems. Firstly, an analytical sensing signal-to-noise ratio (SNR) expression is derived by using the Bussgang decomposition. Furthermore, two different methodologies are proposed to design a transmit waveform that satisfies both communication and sensing requirements simultaneously. The first method uses a separate constant modulus (CM) sensing signal since CM signals are known to be more robust to nonlinear distortion than orthogonal frequency division multiplexing (OFDM) modulated signals. The second method employs the squared-infinity norm Douglas-Rachford splitting (SQUID) approach to construct the transmit waveform using nonlinear quantized precoding. Finally, the performance of the proposed methods are validated via numerical simulations to indicate the complexity-performance tradeoff between two different methods.
URI: https://doi.org/10.1109/ISWCS61526.2024.10639073
ISBN: 9798350362527
9798350362510
ISSN: 2154-0217
Appears in Collections:Elektrik ve Elektronik Mühendisliği Bölümü / Department of Electrical & Electronics Engineering
Scopus İndeksli Yayınlar Koleksiyonu / Scopus Indexed Publications Collection
WoS İndeksli Yayınlar Koleksiyonu / WoS Indexed Publications Collection

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