Related Experiment Video
Updated: Apr 17, 2026

06:42
Generation and Coherent Control of Pulsed Quantum Frequency Combs
Published on: June 8, 2018
9.8K
RF pilot-aided frequency offset and phase noise compensation for photonics-aided D-band MIMO-OFDM systems
Optics Letters
|April 15, 2026
Summary
This study introduces a radio-frequency pilot-aided method for compensating frequency offset and phase noise in D-band MIMO-OFDM systems. The new approach boosts data rates and improves spectral efficiency with reduced pilot overhead.
Area of Science:
- Optical Communications
- Wireless Communications
- Signal Processing
Background:
- Photonics-aided systems are crucial for high-capacity wireless communication.
- Frequency offset and phase noise degrade performance in MIMO-OFDM systems.
- Existing compensation methods can be complex and require significant pilot overhead.
Purpose of the Study:
- To demonstrate a novel RF pilot-aided scheme for joint frequency offset and phase noise compensation.
- To improve spectral efficiency and data rates in D-band MIMO-OFDM systems.
- To offer a low-complexity solution for broadband optical-wireless systems.
Main Methods:
- Experimental demonstration of an RF pilot-aided compensation scheme.
- Utilized 16-quadrature amplitude modulation (16-QAM) and probabilistically shaped 64-QAM (PS-64QAM) signals.
- Joint compensation of frequency offset and phase noise.
Main Results:
- Achieved noticeable signal-to-noise ratio (SNR) improvement.
- Substantially reduced pilot overhead.
- Increased net data rate from 150 to 156 Gbit/s for 16-QAM and 87 to 91 Gbit/s for PS-64QAM.
Conclusions:
- The proposed RF pilot-aided scheme offers a spectrally efficient solution.
- The method provides a low-complexity approach for compensation.
- This technique is suitable for broadband photonics-aided OFDM systems.
Related Concept Videos
Time and frequency -Domain Interpretation of Phase-lead Control
537
Phase-lead controllers are commonly used in various control systems to enhance response speed and stability. Adjusting the brightness on a television screen offers a practical example of phase-lead control. When contrast is enhanced, a phase-lead controller is employed. Mathematically, phase-lead control is identified when the first parameter is smaller than the second.
The design of phase-lead control involves the strategic placement of poles and zeros to balance steady-state error and system...
The design of phase-lead control involves the strategic placement of poles and zeros to balance steady-state error and system...
537
Time and frequency -Domain Interpretation of PI Control
492
Proportional-Integral (PI) controllers are essential in many control systems to improve stability and performance. They are commonly used in everyday devices like thermostats to enhance system damping and reduce steady-state error. When the zero in the controller's transfer function is optimally placed, the system benefits significantly in terms of stability and accuracy.
Acting as a low-pass filter, the PI controller slows the system's response and extends settling times. This requires...
Acting as a low-pass filter, the PI controller slows the system's response and extends settling times. This requires...
492
Time and frequency -Domain Interpretation of Phase-lag Control
453
Phase-lag controllers are widely used in control systems to improve stability and reduce steady-state errors. A dimmer switch controlling the brightness of a light bulb serves as a practical example of phase-lag control, gradually adjusting the bulb's brightness. Mathematically, phase-lag control or low-pass filtering is represented when the factor 'a' is less than 1.
Phase-lag controllers do not place a pole at zero, but instead influence the steady-state error by amplifying any...
Phase-lag controllers do not place a pole at zero, but instead influence the steady-state error by amplifying any...
453
Power Factor Correction
726
The power transmission to a factory involves the transfer of apparent power, a combination of active and reactive power. The power factor measures how effectively electrical power is converted into useful work output. The ratio of the real power (KW) that does the work to the apparent power (KVA) supplied to the circuit.
726
Pilot and Numeric Relaying
543
Pilot relaying is a type of differential protection used in power systems. It compares electrical quantities at the terminals of equipment via a communication channel instead of direct relay interconnection. This method is essential for transmission lines where the terminals are far apart, typically up to 80 km for lines with 69 to 115 kV ratings. Four types of communication channels are used for pilot relaying:
543
Parallel Resonance
780
The parallel RLC circuit is an arrangement where the resistor (R), inductor (L), and capacitor (C) are all connected to the same nodes and, as a result, share the same voltage across them. The parallel RLC circuit is analyzed in terms of admittance (Y), which reflects the ease with which current can flow. The admittance is given by:
780

