Title :
Improved soft de-mapping scaling for a constrained MMSE receiver in OFDM MIMO systems
Author :
Lu, I-Tai ; Teng, Hui-Yuan
Author_Institution :
Dept. of ECE, Polytech. Inst. of NYU, Brooklyn, OH, USA
Abstract :
Since different spatial streams in MIMO systems experience different SINRs, the soft bits of each spatial stream should be scaled according to its SINR. In this paper, we introduced the idea of soft demapping scaling according to SINR and proposed an improved scaling method using a constrained MMSE approach for OFDM MIMO systems. Based on IEEE 802.11n examples, good system performances are observed in various modulation and coding schemes using the proposed soft demapping scaling while computational efficiency is preserved.
Keywords :
MIMO communication; OFDM modulation; encoding; least mean squares methods; radio receivers; wireless LAN; IEEE 802.11; OFDM MIMO systems; coding schemes; computational efficiency; constrained MMSE receiver; improved soft demapping scaling; modulation schemes; spatial streams; Binary phase shift keying; Delta modulation; Interference; MIMO; Signal to noise ratio; Constrained MMSE; MIMO; OFDM; Scaling; Soft Demapping; Soft bit;
Conference_Titel :
Sarnoff Symposium, 2011 34th IEEE
Conference_Location :
Princeton, NJ
Print_ISBN :
978-1-61284-681-1
Electronic_ISBN :
978-1-61284-680-4
DOI :
10.1109/SARNOF.2011.5876458
