Title :
A 50 Mbps 4×4 maximum likelihood decoder for multiple-input multiple-output systems with QPSK modulation
Author :
Burg, A. ; Felber, N. ; Fichtner, W.
Author_Institution :
Integrated Syst. Lab., Zurich, Switzerland
Abstract :
In this article, we present an efficient approach for the implementation of optimum maximum likelihood decoding of QPSK modulated multiple-input-multiple-output data streams. The proposed method does not compromise optimality of the detection algorithm. Instead it uses the special properties of QPSK modulation, together with algebraic transformations and architectural optimizations, to achieve very low hardware complexity and high speed. To our knowledge, it is the fastest and most area efficient reported VLSI implementation of a hard decision maximum likelihood decoder for QPSK based MIMO systems. It can be applied to a variety of narrow band and wideband systems in many different configurations, including different degrees of spatial multiplexing and receive diversity.
Keywords :
MIMO systems; VLSI; channel capacity; diversity reception; logic design; maximum likelihood decoding; quadrature phase shift keying; space division multiplexing; 50 Mbit/s; MIMO data streams; QPSK modulation; VLSI implementation; algebraic transformations; channel capacity; detection algorithm optimality; hard decision maximum likelihood decoder; low hardware complexity; multiple-input multiple-output systems; optimum maximum likelihood decoding; receive diversity; spatial multiplexing; Laboratories; MIMO; Maximum likelihood decoding; Maximum likelihood detection; Maximum likelihood estimation; Noise cancellation; Quadrature phase shift keying; Receiving antennas; Transmitting antennas; Very large scale integration;
Conference_Titel :
Electronics, Circuits and Systems, 2003. ICECS 2003. Proceedings of the 2003 10th IEEE International Conference on
Print_ISBN :
0-7803-8163-7
DOI :
10.1109/ICECS.2003.1302044