Rate-Adaptive Multiple Access for Uplink Grant-Free Transmission

Table 1

Simulation parameters.

Parameters	Values or Assumptions
User number	100
Activation probability	0.002 : 0.002 : 0.06
Waveform	OFDM
Average received SNR	Uniformly distributed in  dB
Small scale channel model	Rayleigh fading, with correlation coefficients, equals 0.2, 0.5, and 0.8
Transmission mode	TM 1 (SISO)
Length of information bits	1024
Channel coding	1/3 rate Turbo
Modulation of conv-GF	QPSK
Modulation of RAMA	Use Figure 8(a) with
Channel estimation	Ideal
Receiver	MMSE-SIC