Title :
Optimal detection considering AGC effects in multiple antenna systems
Author :
Kim, Myung-Soon ; Jo, Gweon-Do ; Kim, Jin-up
Author_Institution :
Telecommun. & Broadcasting Convergence Sector, Electron. & Telecommun. Res. Inst., Daejeon
Abstract :
Most detection methods for multiple input multiple output (MIMO) systems are derived with an assumption that the noise from multiple receive paths is white. However, This assumption cannot be valid according to automatic gain control (AGC) schemes. If the independent AGC scheme which has difference gain for each receive path to minimize the quantization noise is employed, the AGC output noise is not white any more. Therefore, the colored noise effects due to AGC should be considered for the optimal detection. In detail, such colored noise effects should be included in the maximum likelihood (ML) detection criterion and the log likelihood ratio (LLR) calculation.
Keywords :
MIMO communication; antenna arrays; maximum likelihood detection; AGC effects; automatic gain control schemes; colored noise effects; log likelihood ratio; maximum likelihood detection criterion; multiple antenna systems; multiple input multiple output systems; multiple receive paths; optimal detection; quantization noise; Colored noise; Distortion; Gain control; MIMO; Maximum likelihood detection; Quantization; Receiving antennas; Transmitting antennas; White noise; Wireless LAN; AGC; MIMO detection; ML detection;
Conference_Titel :
Consumer Electronics, 2008. ISCE 2008. IEEE International Symposium on
Conference_Location :
Vilamoura
Print_ISBN :
978-1-4244-2422-1
Electronic_ISBN :
978-1-4244-2422-1
DOI :
10.1109/ISCE.2008.4559562
