OCT-Precoding Combined with LDPC-Coding Scheme for 128 QAM MB-OFDM UWBoF System

Table 1

The main parameters of simulation based on OCT-precoding combined with the LDPC-coding scheme.

Parameter name	Parameter name
OFDM symbol duration	312.5 ns
Number of IFFT/FFT points/number of subcarriers	128
CP and ZPS	37 (=16 + 21)
Data/pilot/empty subcarrier/protection	100/12/6/10
Bandwidth (only for one frequency band)	528 MHz
Number of TS/OFDM symbols	3/312
DAC and ADC sampling rate	10.561 GSps and 20 GSps
Modulation scheme	128 QAM
Total number of bits per OFDM symbol	128 QAM: 1007 = 700 bits
Original signal bit rate	128 QAM: log2(128)(1/312.5)100 = 2.24 Gbps
Net signal bit rate	128 QAM: 700312/(31516520/10.561) = 2.22 Gbps
Spectral efficiency	128 QAM: 2.22/(100/1280.528) = 5.38 bit/s/Hz
LDPC-coding rate	87.5%
Net signal bit rate (LDPC coding)	2.24∗87.5% Gbps = 1.95 Gbps
Spectral efficiency (LDPC coding)	5.38∗87.5% bit/s/Hz = 4.71 bit/s/Hz