Title :
Study on modulo-lattice in vector perturbation for MIMO broadcast channels
Author :
Zheng, Jianping ; Bai, Baoming ; Li, Ying ; Gu, Daqing ; Luo, Yajuan
Author_Institution :
State Key Lab. of Integrated Services Networks, Xidian Univ., Xi´´an, China
Abstract :
The modulo in the vector perturbation for the multiple-input multiple-output broadcast channel is studied. The notion of modulo-lattice is presented, which is a direct extension of the conventional modulo constant. And the conditions that a good modulo-lattice should be satisfied are analyzed. Based on this analysis, some good modulo-lattices are suggested for the quadrature-amplitude modulation (QAM) and the phase-shift keying (PSK), respectively. For example, a scale hexagonal lattice is suggested as the modulo-lattice for M-PSK (M>4). Moreover, the efficient implementation of the modulo-lattice at the transceiver is illustrated by the scale hexagonal lattice. Simulations show that the modulo-lattice suggested has a gain of about 0.8 dB over the conventional modulo constant in high signal-to-noise ratio (SNR) regions for M-PSK.
Keywords :
MIMO communication; broadcast channels; least mean squares methods; phase shift keying; quadrature amplitude modulation; MIMO broadcast channels; modulo-lattice; phase-shift keying; quadrature-amplitude modulation; vector perturbation; Broadcasting; Electronic mail; Lattices; MIMO; Phase modulation; Phase shift keying; Quadrature amplitude modulation; Receiving antennas; Transmitting antennas; Vectors; broadcast channel; multiple-input multiple-output (MIMO); the hexagonal lattice; vector perturbation;
Conference_Titel :
Communications, 2009. APCC 2009. 15th Asia-Pacific Conference on
Conference_Location :
Shanghai
Print_ISBN :
978-1-4244-4784-8
Electronic_ISBN :
978-1-4244-4785-5
DOI :
10.1109/APCC.2009.5375637
