Photonic-Assisted Error-Free Wireless Communication With Multipath Precompensation Covering 2–18 GHz

Abstract

Abstract-A wireless communication experiment that uses photonic-assisted radio-frequency arbitrary waveform generation (RF-AWG) for precompensation of multipath distortion over a 2-18 GHz frequency band is reported. Photonic-assisted RF-AWG is used both for spread spectrum sounding of the multipath channel and for synthesis of precompensation waveforms that yield pulse compression and distortion suppression at the receiver. By directly encoding the precompensated waveforms in optical hardware, 250 Mbit/s error-free data transmission is achieved experimentally in binary-phase-shift-keying format. For the first time to our knowledge, phase compensation and time reversal precompensation techniques are compared in hardware encoded data transmission experiments; our results confirm predictions that phase compensation outperforms time reversal under intersymbol interference limited conditions. Index Terms-Microwave communications, multipath channel, optical pulse shaping.

Recent Advances in Programmable Photonic-Assisted Ultrabroadband Radio-Frequency Arbitrary Waveform Generation

“…These experimental results demonstrate clear spatio-temporal compression over an ultrabroadband dense multipath wireless channel. Recently, we have achieved a significant extension of this work, demonstrating data transmission at 250 Mbits/sec over a similar multipath channel [88]. These works show that photonic RF-AWG-based systems are capable of performing not only signal distribution, but also sophisticated functionalities such as channel measurement, channel compensation, and high-speed communication.…”

Establishment Network by Using FSO Link Based on MD Code for Hybrid SCM-SAC-OCDMA Wireless System

“…Also by RoF, information can be transported over optical fiber with modulating in direct or indirect light with radio signal. There is an external modulator to modulate the optical signal called Mach Zehnder modulator (MZM) and Mach Zehnder Interferometer (MZI) is used to split this signal into 2 paths [18], [19], and [20]. After summing the 2 signals, they interfere depending on delay time with each other.…”

A Review of Photonic Generation of Arbitrary Microwave Waveforms

“…There is also a significant interest in the frequency chirp generations using Fourier pulse shaping and frequency to time mapping, especially the demonstration compact photonic integration [43], flexible tuning of chirp rate [37], control of chirp sign [44] and the ability of shaping the waveform envelop [45]. There are also applications of arbitrary waveform generation for measuring and compensating for multipath channel propagation that overcomes inter-symbol interference [46] and for rapidly reconfigurable RF filtering [38,47]. There are also significant activities in the field of waveform generation based on microwave photonic filtering, particularly the generation of triangular wave train [48,49].…”