Deep Learning-Based Frequency Offset Estimation

The DA methods leverage known signal sequences to estimate the frequency offset, simplifying the operational and computational aspects while achieving enhanced estima-tion accuracy.

US8639126B1

Methods, systems, and devices are described for coarse frequency offset estimation and correction for high-speed optical communications.

Joint channel/frequency offset estimation and correction for coherent

In this paper, we focus on analysis of the preamble-based joint estimation for channel and laser-frequency offset (LFO) in coherent optical filter bank multicarrier systems with offset quadrature

Frequency Offset Estimation for NFDM Optical Communication

Based on a thorough investigation of the FO induced behavior that appears in a nonlinear frequency division multiplexing (NFDM) system, we proposed a nonlinear frequency

Joint mitigation of frequency offset and phase noise for coherent free

Even with adaptive optical beam steering or adaptive optical systems, the coherent FSO communication systems still have many barriers which are mainly the frequency offset, phase noise

Wide-range frequency offset estimation method for a coherent optical

In this paper, we propose a wide-range LFO estimation and correction procedure for a coherent optical FBMC/OQAM system. Using a deliberately designed preamble, this method can not

Joint frequency offset estimation and adaptive equalization for a

Coherent optics are emerging as promising solutions for future passive optical networks. However, upstream burst-mode coherent detection faces challenges due to the need for fast digital

Coarse frequency offset estimation and compensation based on short

Low complexity, short capture time, and stable coarse frequency offset estimation and compensation algorithms are technical bottlenecks that must be addressed. In this work, a coarse

Pilot-aided sampling frequency offset estimation and compensation

To improve the outage performance of an optical orthogonal frequency-division multiplexing (OFDM) system under the frequency offset between the sampling clocks in the

Fast Fourier Transform Improved Frequency Offset Estimation

To improve the estimation accuracy of frequency offset estimation algorithm and reduce the hardware implementation complexity of the algorithm, this paper proposes a blind frequency offset estimation

Double-stage Carrier Frequency Offset Estimation Using the

We propose a novel method to estimate the carrier frequency offset (CFO) using the eigenvalue and scattering coefficient b in the NFT. Our experiments demonstrate fine CFO estimation below 10 kHz

A simple and efficient frequency offset estimation algorithm for high

In this paper, we propose a simple frequency offset estimation (FOE) algorithm for high-speed coherent optical orthogonal frequency-division multiplexing (CO-OFDM) systems, which

IEEE Paper Template in A4 (V1)

Coarse offsets results in two problems; firstly, the modulation symbols are located on the wrong frequency bins, secondly, the pilots used for channel estimation are misplaced leading to a faulty

frequency offset

''Frequency offset'' refers to the difference between the actual frequency of a signal and the expected or reference frequency. It is commonly estimated in the frequency domain using specific mathematical

Frequency offset estimation algorithm for a multi-subcarrier coherent

We introduce a new technique for obtaining the frequency offset introduced at the receiver due to the heterodyning of the transmitter laser and the local oscillator.

Fast Fourier Transform Improved Frequency Offset Estimation

Frequency offset estimation is an important part of digital signal processing (DSP), and its estimation performance is the key factor of signal demodulation. To improve the estimation accuracy of

Frequency Offset Estimation and Correction

Many techniques have been proposed lately to estimate the frequency offset. Most of the techniques that are proposed for packet communications systems rely on the transmission of known training

What is Frequency offset and does this impact signal quality

The frequency offset introduces a time-dependent phase shift in the received signal. This estimation is further followed by carrier phase recovery mechanism which is a part of DSP .

Frequency Offset Estimation and Correction

Abstract— This paper shows how to utilize the Short Training Sequence, Long Training Sequence and Pilot Subcarriers, of the IEEE 802.11a frame, to estimate and equalize the effect of both carrier and

Reduced sampling rate Kalman filters for carrier phase and frequency

We propose 1 state and 2 state multi-step Kalman filters (MKFs) to estimate and compensate CFO, LPN and NLPN in long-haul coherent fiber-optic communication systems.

Frequency offset estimation algorithm for a multi-subcarrier coherent

31 January 2020 Frequency offset estimation algorithm for a multi-subcarrier coherent fiber optical system Ryan Ramdial, Xiaojun Liang, Shiva Kumar, John D. Downie, William A. Wood Author

Research on 5G Signal Frequency Offset Estimation Method Based

ABSTRACT For the problem that carrier frequency offset in the 5G communication system leads to the inability of the demodulation end to correctly recover the original information

Almost-Blind Frequency Offset Estimation Method With Wide Range

As a potential way for surpassing the Kerr nonlinearity limit, nonlinear frequency division multiplexing (NFDM) transmission scheme has attracted much attention in fiber-optic communication systems.

A Robust and Efficient Frequency Offset Correction Algorithm With

Frequency offset correction (FOC) is essential for a coherent optical orthogonal frequency-division multiplexing (CO-OFDM) system. In this paper, we proposed a robust and efficient

A Chromatic Dispersion-Tolerant Frequency Offset

In this paper, a pilot tone-based FOE algorithm is proposed for DSCM systems, which estimates FO by tracking the frequency offset of the pilot

Joint mitigation of frequency offset and phase noise for coherent free

In this paper, taking the atmospheric turbulence into account, two low-complexity algorithms which can jointly compensate the frequency offset (FO) and phase noise (PN) caused by