ASIC Implementation of Soft-Input Soft-Output MIMO Detection Using MMSE Parallel Interference Cancellation

作者：Studer Christoph^*; Fateh Schekeb; Seethaler Dominik

来源：IEEE Journal of Solid-State Circuits, 2011, 46(7): 1754-1765.

DOI：10.1109/JSSC.2011.2144470

• Iterative detection and decoding
• minimum mean-square error (MMSE)
• multiple-input multiple-output (MIMO)
• parallel interference cancellation (PIC)
• soft-input soft-output (SISO)
• spatial multiplexing
• very-large scale integration (VLSI)
• wireless communication

Multiple-input multiple-output (MIMO) technology is the key to meet the demands for data rate and link reliability of modern wireless communication systems, such as IEEE 802.11n or 3GPP-LTE. The full potential of MIMO systems can, however, only be achieved by means iterative MIMO decoding relying on soft-input soft-output (SISO) data detection. In this paper, we describe the first ASIC implementation of a SISO detector for iterative MIMO decoding. To this end, we propose a low-complexity minimum mean-squared error (MMSE) based parallel interference cancellation algorithm, develop a suitable VLSI architecture, and present a corresponding four-stream 1.5 mm(2) detector chip in 90 nm CMOS technology. The fabricated ASIC includes all necessary preprocessing circuitry and exceeds the 600 Mb/s peak data-rate of IEEE 802.11n. A comparison with state-of-the-art MIMO-detector implementations demonstrates the performance benefits of our ASIC prototype in practical system-scenarios.

• 出版日期2011-7