Broadband MIMO Simulation System

Computer simulation is a very important tool for wireless communication systems R&D. ASTRI has developed a standard 802.11n compatible simulation system to facilitate advanced 802.11n MIMO platform development.

Applications

The system can be used to verify system algorithms and to evaluate the performance in a short time. MATLAB has been chosen to be used to build this system and the simulation system has been well defined as stated in the specifications.

• Fully Functional 802.11n simulation system
• Compliable Matlab code
• Modules with standard input and output parameters
• Transmitter includes blocks for:
  • Randomization; Encoder parser ;
  • FEC (Convolutional code; LDPC; Support multiple encoders);
  • Stream parser; Interleaver
  • Modulator (BPSK, QPSK, 16QAM, 64QAM)
  • MIMO Encoding (STBC; SDM; Hybrid scheme) & CSD
  • Spatial Mapping (Direct mapping; Spatial expansion; Closed-form beamforming)
  • Pilot Insertion; IFFT; CP
  • Antenna Selection
• Receiver includes blocks for:
  • Antenna Selection, AGC, AFC
  • Synchronization, Time/frequency correction
  • CP removal, FFT, Equalization
  • Channel estimation; Channel Matrix (Full/compressed matrix)
  • MIMO detection (ZF&MMSE; ZF-VBLAST; MMSE-VBLAST; MLD; Advanced MIMO detection scheme)
  • Demodulator & deinterleaver
  • Decoder (Viterbi for CC; Sum-product for LDPC)
  • De-randomization
• Slim MAC includes blocks for:
  • User data generation
  • Control functions (Mode selection; Antenna Selection; Beamforming)
  • CSI Estimation
  • Performance measurement & output visualization (system status)
• Channel Model includes blocks for
  • 3-D Channel Model (Real MIMO channel from channel measurement platform/ Simulated MIMO channel from 3-D channel simulator)
  • Random timing and frequency offset
• Random sampling frequency offset