Performance of Thresholded SCL-SGRAND (T-SCLSGRAND) in VLC System

Visible light communication (VLC) has emerged as an alternative to data communication, offering higher bandwidth than radio communication. To fully leverage its advantages, Polar codes, recognized as capacity-achieving codes, are employed in serial concatenation with run-length limited (RLL). In this paper, we propose an enhancement to our previous decoding method, successive cancellation list - soft guessing random additive noise decoding (SCL-SGRAND), termed thresholded SCLSGRAND (T-SCLSGRAND). By introducing a variable called the threshold $t$, which reduces the length of the soft information used as the input for SGRAND in T-SCLSGRAND, this method demonstrates improved bit-error rate (BER) performance compared to successive cancellation list (SCL) and cyclic redundancy check (CRC)-aided SCL (CA-SCL) by 0.7 and 0.2 dB, respectively, under a small upper limit $b$.