SIC and K-best LSD receiver implementation for a MIMO-OFDM system

Author

Ketonen, Johanna ; Juntti, Markku

Author_Institution

Centre forWireless Commun., Univ. of Oulu, Oulu, Finland

fYear

2008

fDate

25-29 Aug. 2008

Firstpage

1

Lastpage

5

Abstract

MIMO-OFDM receivers with horizontal encoding are considered in this paper. The successive interference cancellation (SIC) algorithm is compared to the K-best list sphere detector (LSD). The SIC and K-best LSD receivers are designed for a 2 × 2 antenna system with quadrature phase shift keying (QPSK), 16-quadrature amplitude modulation (QAM) and 64-QAM. The linear minimum mean squared error (LMMSE) based SIC detector cancels decoder outputs from the received signal. The performance of the SIC algorithm depends on the channel conditions. The SIC algorithm performs worse than maximum a posteriori probability (MAP) and the K-best list sphere detectors (LSD) when the MIMO streams are highly correlated but the SIC receiver performs better than the K-best LSD with less correlated streams. However, the latency of the K-best LSD is higher than that of the SIC receiver.

Keywords

MIMO communication; OFDM modulation; encoding; maximum likelihood estimation; mean square error methods; quadrature amplitude modulation; quadrature phase shift keying; radio receivers; 16-quadrature amplitude modulation; 64-QAM; K-best LSD receiver; LMMSE; MAP; MIMO; OFDM; QPSK; SIC detector; antenna system; horizontal encoding; linear minimum mean squared error; list sphere detector; maximum a posteriori probability; quadrature phase shift keying; successive interference cancellation algorithm; Antennas; Complexity theory; Decoding; Detectors; Receivers; Silicon carbide; Vectors;

fLanguage

English

Publisher

ieee

Conference_Titel

Signal Processing Conference, 2008 16th European

Conference_Location

Lausanne

ISSN

2219-5491

Type

conf

Filename

7080612