Feasibility Study and Experimental Verification of Simplified Fiber-Supported 60-GHz Picocell Mobile Backhaul Links

Abstract

We propose and experimentally demonstrate a fiber-wireless transmission system for optimized delivery of 60-GHz radio frequency (RF) signals through picocell mobile backhaul connections. We identify advantages of 60-GHz links for utilization in short-range mobile backhaul through feasibility analysis and comparison with an alternative E-band (60-90 GHz) technology. The 60-GHz fiber-wireless-fiber setup is then introduced: two spans of up to 20 km of optical fiber are deployed and bridged by up to 4 m of wireless distance. The 60-GHz radio-over-fiber technology is utilized in the first span of fiber transmission. The system is simplified and tailored for delivery of on-off keying data signals by employing a single module for lightwave generation and modulation combined with a simplified RF downconversion technique by envelope detection. Data signals of 1.25 Gb/s are transmitted, and a bit-error-rate performance below the 7% overhead forward-errorcorrection limit is achieved for a range of potential fiber deployment scenarios. A spurious free dynamic range of 73 dB-Hz 2=3 is attained for a frequency-doubling photonic RF upconversion technique. The power budget margin that is required to extend the wireless transmission distance from 4 m to a few hundred meters has been taken into account in the setup design, and the techniques to extend the wireless distance are analyzed.

Gigabit close-proximity wireless connections supported by 60 GHz RoF links with low carrier suppression

“…4 the slope of the curve flattens at about 0 dBm suppression value. These results are consistent with the results that we previously reported in the case of 40 Gb/s MZM when the carrier suppression was varied from 0 to 20 dB [26]. Reported degradation in RF power after E/O, fiber transmission, and O/E conversion is overcome by using a double-stage LNA.…”

Multigigabit W-Band (75–110 GHz) Bidirectional Hybrid Fiber-Wireless Systems in Access Networks

“…For outdoor applications, where the multipath effect is considerably reduced and can be negligible, the maximum path loss margin will be determined by the maximum radiated power at the transmitter, the thermal noise floor at the receiver and the minimum required SNR for the signal modulation formats, considering that the received signal SNR after the LNA is higher than the minimum required value. The maximum radiated power is then limited by the saturation power of the PA at the transmitter [41].…”

Energy-Efficient Scheduling for mmWave Backhauling of Small Cells in Heterogeneous Cellular Networks

“…There are also some works on utilizing mmWave band for wireless backhaul. Lebedev et al [28] identified advantages of the 60 GHz band for short-range mobile backhaul by feasibility analysis and comparison with E-band. Bojic et al [29] discussed the advanced wireless and optical technologies for small cell mobile backhaul with dynamic software-defined management in 60 GHz and E-band.…”