Title :
Transmit power allocation for successive interference cancellation in multicode MIMO systems
Author :
Park, Chang Soon ; Lee, Kwang Bok
Author_Institution :
Sch. of Electr. Eng. & Comput. Sci., Seoul Nat. Univ., South Korea
Abstract :
Multiple-input multiple-output (MIMO) system with multicode transmission can provide high speed data services by transmitting independent parallel substreams from multiple antennas and through multicode channelization. In this paper, we first introduce an iterative two-stage successive interference cancellation (SIC) detection scheme for a multicode MIMO system. Next, we derive various transmit power allocation schemes over different data substreams for the proposed detection process to improve error rate performance. The power allocation is performed to make the signal-to-interference-plus-noise ratio (SINR) become balanced for all data substreams. Numerical results show that the proposed transmit power allocation schemes for the two-stage SIC significantly outperform the equal power allocation scheme.
Keywords :
MIMO systems; antenna arrays; channel allocation; channel coding; data communication; interference suppression; iterative methods; data services; detection process; independent parallel substreams; iterative two-stage successive interference cancellation; multicode MIMO systems; multicode channelization; multiple antennas; multiple-input multiple-output; signal-to-interference-plus-noise ratio; transmit power allocation; Bit error rate; Computer science; Interference cancellation; MIMO; Multiaccess communication; Receiving antennas; Signal to noise ratio; Silicon carbide; Transmitters; Transmitting antennas;
Conference_Titel :
Communications, 2005. ICC 2005. 2005 IEEE International Conference on
Print_ISBN :
0-7803-8938-7
DOI :
10.1109/ICC.2005.1494772
