Title :
Word length study and architecture design of a K-best based MIMO-OFDM detector algorithm
Author :
Kerttula, Johanna ; Myllylä, Markus ; Juntti, Markku
Author_Institution :
Univ. of Oulu, Oulu
Abstract :
The combination of multiple-input multiple-output (MIMO) and orthogonal frequency-division multiplexing (OFDM) has been adopted for high-data-rate transmission. A word length study and a top level architecture of a K-best based list sphere detector (LSD) algorithm for a MIMO-OFDM system are introduced in this paper. The word lengths were determined with computer simulations for 2 times 2 and 4 times 4 antenna systems with quadrature phase shift keying (QPSK), 16-quadrature amplitude modulation (QAM) and 64-QAM. The resulting word lengths can be used in the hardware implementation of the K-best LSD and they will lead to optimal floating point performance. The architecture was designed for a 2 times 2 antenna system with operating modes for QPSK and 16-QAM. Also a top level structure of a 4 times 4 MIMO detector is presented. The architecture allows the use of a variable list size.
Keywords :
MIMO communication; OFDM modulation; antenna arrays; quadrature amplitude modulation; quadrature phase shift keying; radio access networks; word processing; MIMO-OFDM detector algorithm; QAM; QPSK; list sphere detector; multiple-input multiple-output system; orthogonal frequency-division multiplexing; quadrature amplitude modulation; quadrature phase shift keying; word length study; Algorithm design and analysis; Amplitude modulation; Computer architecture; Computer simulation; Detectors; Frequency division multiplexing; MIMO; OFDM; Quadrature amplitude modulation; Quadrature phase shift keying;
Conference_Titel :
Signal Processing Advances in Wireless Communications, 2007. SPAWC 2007. IEEE 8th Workshop on
Conference_Location :
Helsinki
Print_ISBN :
978-1-4244-0955-6
Electronic_ISBN :
978-1-4244-0955-6
DOI :
10.1109/SPAWC.2007.4401339
