Title :
MIMO precoding design for OFDMA uplink systems with MAI and ICI interferences
Author :
Deng, Juinn-Horng ; Jang, Yuh-Cherng
Author_Institution :
Dept. of Commun. Eng., Yuan Ze Univ., Chungli, Taiwan
Abstract :
In this study, a precoding OFDMA uplink technique is proposed for the upcoming 4G cellular system. Candidates for 4G system include WiMAX 2.0 and 3GPP LTE-Advanced. This study specifically addresses the common carrier frequency offset (CFO) problem that causes inter carrier interference (ICI) and multiple access interference (MAI). A novel QR dirty paper coding (QR-DPC) method based on QR decomposition is proposed. With the aid of block diagonalization (BD) algorithm, the precoding technique effectively eliminates annoying MAI in a multiuser uplink system. Thus, the combination of BD and QR-DPC can substantially enhances BER performance as compared to conventional DPC. The second part is to extend QR-DPC to MIMO structure. This study derived a 2 × 2 QR-DPC structure, which can be extended to any M × M MIMO case with M >; 2. In the end a combination of space-time block coding (STBC) and spatial multiplexing (SM) MIMO structures can achieve high rate and high quality transmission for OFDMA uplink system.
Keywords :
3G mobile communication; 4G mobile communication; Long Term Evolution; MIMO communication; OFDM modulation; WiMax; cellular radio; error statistics; frequency division multiple access; intercarrier interference; precoding; space division multiplexing; space-time block codes; 3GPP LTE-Advanced; 4G cellular system; BD algorithm; BER performance; CFO problem; ICI interference; MAI interference; MIMO precoding design; OFDMA uplink systems; QR decomposition; QR dirty paper coding method; QR-DPC method; SM MIMO structure; STBC; WiMAX 2.0; block diagonalization algorithm; carrier frequency offset problem; intercarrier interference; multiple-access interference; multiuser uplink system; orthogonal frequency division multiple access; precoding OFDMA uplink technique; space-time block coding; spatial multiplexing MIMO structure; Antennas; Equations; Interference; MIMO; Transceivers; Vectors; 4G; Block diagonalization; Dirty paper coding; ICI; MAI; MIMO; OFDMA; Precoding;
Conference_Titel :
Communications (APCC), 2012 18th Asia-Pacific Conference on
Conference_Location :
Jeju Island
Print_ISBN :
978-1-4673-4726-6
Electronic_ISBN :
978-1-4673-4727-3
DOI :
10.1109/APCC.2012.6388199
