An Adaptive Partial Parallel Multistage Detection for MIMO (V-BLAST) System

• Main Authors: Hsin-Lung Li, 李欣隆
• Other Authors: Shih-Lin Wu
• Format: Others
• Language: en_US
• Published: 2003
• Online Access: http://ndltd.ncl.edu.tw/handle/83968522397726960760

碩士 === 長庚大學 === 電機工程研究所 === 91 === Recently information theory research has shown that the rich-scattering wireless channel is capable of enormous theoretical capacities if an appropriate processing architecture is used. A previous proposed parallel multistage detection (similar to parallel interference cancellation) for multiple antenna systems has less processing delay and better performance than the V-BLAST (Vertical- Bell Laboratories Layered Space-Time). However, owing to the disadvantage of full parallel interference cancellation, the performance of the previous scheme will degrade when the received powers of transmitted data bits at one receive antenna are unbalanced and/or when in the system is heavily loaded. Therefore, we introduce a partial weighting coefficient into the parallel multistage detection to overcome the performance degradation. The weighting coefficient is evaluated by the average correct probability (1-average error probability) of the previous stage’s decision, through this method, the weighting will change dynamically with the channel condition and previous decision. In the simulation, we show out the Symbol Error Rate of our proposed method superior to the full parallel multistage detection.