Fig. 13
From: Efficient quantization and fixed-point representation for MIMO turbo-detection and turbo-demapping
Floating-point vs. fixed-point FER performance comparison turbo demodulation of 1536 source bits, \(\frac {1}{2}\) code rate, and fast fading Rayleigh channel. a 2 × 2 MIMO SM, QPSK. b 4 × 4 MIMO SM, QPSK. c 2 × 2 MIMO SM, 16-QAM. d 4 × 4 MIMO SM, 16-QAM