TY - GEN
T1 - A 1.5-bit Quantization Scheme and Its Application to Sparse Array Direction Estimation
AU - Lu, Xicheng
AU - Liu, Wei
AU - Alomainy, Akram
N1 - Publisher Copyright:
© 2024 IEEE.
PY - 2024/7
Y1 - 2024/7
N2 - In massive multiple-input multiple-output (MIMO) array systems, the balance between complexity and operational performance has motivated the use of 1-bit analogue-to-digital converters (ADCs). This paper introduces an innovative 1.5-bit ADC design for direction of arrival (DOA) estimation, where the term 1.5-bit is used to distinguish it from the 1-bit scheme. Its information entropy varies with the threshold level set, up to a maximum of log2 3 bits. Characterized by its three quantization levels, the design aims to mitigate the significant quantization loss associated with conventional 1-bit ADCs. Simulation results demonstrate the excellent performance of the 1.5-bit ADC in low-complexity arrays, suggesting that it has the potential to significantly improve the efficiency of massive MIMO systems without incurring much additional cost.
AB - In massive multiple-input multiple-output (MIMO) array systems, the balance between complexity and operational performance has motivated the use of 1-bit analogue-to-digital converters (ADCs). This paper introduces an innovative 1.5-bit ADC design for direction of arrival (DOA) estimation, where the term 1.5-bit is used to distinguish it from the 1-bit scheme. Its information entropy varies with the threshold level set, up to a maximum of log2 3 bits. Characterized by its three quantization levels, the design aims to mitigate the significant quantization loss associated with conventional 1-bit ADCs. Simulation results demonstrate the excellent performance of the 1.5-bit ADC in low-complexity arrays, suggesting that it has the potential to significantly improve the efficiency of massive MIMO systems without incurring much additional cost.
KW - 1-bit quantization
KW - correaltion function
KW - DOA estimation
KW - low-bit quantization
KW - sparse array
UR - http://www.scopus.com/inward/record.url?scp=85203431406&partnerID=8YFLogxK
U2 - 10.1109/ISWCS61526.2024.10639088
DO - 10.1109/ISWCS61526.2024.10639088
M3 - Conference article published in proceeding or book
AN - SCOPUS:85203431406
T3 - Proceedings of the International Symposium on Wireless Communication Systems
BT - 2024 19th International Symposium on Wireless Communication Systems, ISWCS 2024
PB - VDE Verlag GmbH
T2 - 19th International Symposium on Wireless Communication Systems, ISWCS 2024
Y2 - 14 July 2024 through 17 July 2024
ER -