Iterative Signal Processing for Mitigation of Analog-to-Digital Converter Clipping Distortion in Multiband OFDMA Receivers

Table 1

Parameters for the simulated uplink multiuser scenario.

Parameter	Value
Number of users	2
FFT size 𝑁	2048
Active subcarriers per user	512
Scattered pilots per user	64
CP length	128 samples
Sampling rate	30.72 MHz
Subcarrier spacing	15 kHz
Subcarrier modulation	16-QAM (𝑀=4)
Channel profile	Extended ITU-R Veh. A [25]
Channel codec	Turbo codec (Max-Log-MAP)
Coding rate 𝑅	1/2
Coded block length 𝑈out	3584 bits (2 OFDM symbols)
Decoding iterations	Max. 5
Clipping comp. iterations 𝐼	5 (or 10)
Clipping level 𝛾	0–10 dB
SNR for User 1 𝑆𝑁𝑅1	16–36 dB