Title :
Statistical analysis of user-pairing algorithms in virtual MIMO systems
Author :
Dhakal, Sagar ; Kim, JoonBeom
Author_Institution :
Naval Res. Lab. (NRL), Washington, DC, USA
Abstract :
In this paper a novel algorithm for user-pairing is proposed for virtual multiple-input multiple-output (V-MIMO) systems. Channel orthogonality is utilized to derive an expression for the output SNR (OSNR) in a V-MIMO system. We also show that the V-MIMO OSNR almost surely converges to the OSNR of a single input multiple output transmission as number of receive antennas approach infinity. Applying the statistical properties of orthogonality to independent and identically distributed wireless channels, system performance for the proposed pairing algorithm is evaluated in terms of joint capacity, OSNR loss, throughput fairness, and computational complexity. Numerical results show that the proposed orthogonal pairing algorithm outperforms conventional pairing methods that are oriented to maximize joint capacity.
Keywords :
MIMO communication; computational complexity; least mean squares methods; statistical analysis; telecommunication computing; virtual reality; wireless channels; OSNR loss; V-MIMO system; channel orthogonality; computational complexity; distributed wireless channels; joint capacity; minimum mean square error; output SNR; pairing algorithm; single input multiple output transmission; statistical analysis; throughput fairness; user-pairing algorithms; virtual multiple-input multiple-output systems; Computational complexity; Degradation; MIMO; Optical noise; Receiving antennas; Signal to noise ratio; Statistical analysis; System performance; Throughput; Transmitting antennas; Virtual multiple-input multiple-output (VMIMO); minimum mean square error (MMSE); multi-user pairing algorithm; single-input multiple-output (SIMO);
Conference_Titel :
Wireless Telecommunications Symposium (WTS), 2010
Conference_Location :
Tampa, FL
Print_ISBN :
978-1-4244-6558-3
DOI :
10.1109/WTS.2010.5479641