CPRI-Compatible Efficient Mobile Fronthaul Transmission via Equalized TDMA Achieving 256 Gb/s CPRI-Equivalent Data Rate in a Single 10-GHz-Bandwidth IM-DD Channel

Key technologies to enable terabit-scale digital radio-over-fiber systems

“…Thus, the vector coding has another merit compared with the differential coding, shown in its adaption to high PAPR to analog radio signals like OFDM. As a result, lossless coding could theoretically improve the performance of differential coding while could not improve vector coding [15][16]. Finally, the supported QAM orders vary from 4 to 4096, which can support various types of radio services, and the thresholds of different modulation orders are referred to 3GPP standard (3GPP TS 36.104 V12.6.0).…”

The new flexible mobile fronthaul: Digital or analog, or both?

“…The problems for I/Q sampled waveform transport for new mobile systems has raised the interest in analog transport: in [10] for example, the transport of 14 100-MHz channels, closely-separated through the use of the filter-bank multicarrier (FBMC) technique, was demonstrated using only just over 1.5 GHz analog bandwidth -projecting CPRI rates, this would have required over 70 Gb/s in a digital fronthaul. In [11], multiple antenna streams and control words are quadrature-amplitude modulated as a < 10 GHz bandwidth analog signal which would be equivalent to a 256 Gb/s CPRI stream. While [10] and [11] show the bandwidth efficiency possible using analog techniques, neither demonstrated radio transmission.…”

“…In [11], multiple antenna streams and control words are quadrature-amplitude modulated as a < 10 GHz bandwidth analog signal which would be equivalent to a 256 Gb/s CPRI stream. While [10] and [11] show the bandwidth efficiency possible using analog techniques, neither demonstrated radio transmission. In [12] a photonic mm-wave up-conversion technique is used for 1 GHz and 3.5 GHz wide OFDM radio signals -from Table 1 it can be seen that these would require bit rates for I/Q sampled waveform transport of the order of 50 -150 Gb/s.…”

End-to-End Demonstration of Fiber-Wireless Fronthaul Networks Using a Hybrid Multi-IF-Over-Fiber and Radio-Over-Fiber System

“…Therefore, high-speed electrical and optical components are no longer required in the analog system [15,16]. To date, several transmission experiments using the RoF/IFoF system have been conducted to investigate the feasibility of analog mobile fronthaul (MFH) links [17][18][19][20][21][22][23]. For example, [21] demonstrated IFoF transmission over 1 km with a CPRI-equivalent capacity of up to 400 Gbps by using digital signal processing (DSP)-based channel aggregation.…”