Improved time and frequency synchronization for dual‐polarization OFDM systems

Ninahuanca, José Luis Hinostroza; Junior, Osmar Tormena; Meloni, Luís Geraldo Pedroso

doi:10.4218/etrij.2021-0014

Cited by 2 publications

(2 citation statements)

References 21 publications

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“…When compared to their monopolarized (SP) counterparts, simulations of the DP system methods for the STO estimator and CFO estimate showed a faster decline in variance with a double slope in the log variance line against the SNR plot for quadrupole-valued or complex-valued signals, respectively. The reported benefits for DP systems using SP OFDM were used to estimate the Cramer-Rao limits for STO and CFO for the synchronization techniques [16].…”

Section: Related Workmentioning

confidence: 99%

A New Approach to Improve Transmitting and Receiving Timing in Orthogonal Frequency Division Multiplexing (OFDM) Systems

Abed

2023

ijcsm

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Nowadays, most wireless communications employ OFDM technology to reduce signal interference. Its sensitivity to timing faults, however, can cause a severe performance reduction. This study suggests a new approach to enhance communication systems' transmitting and receiving time. Although OFDM is a widely used modulation strategy in communication systems, it is vulnerable to timing faults, which can seriously affect performance. A frequency interference processing method is created that uses OFDM technology and goes through numerous steps, such as correcting CFO, adding a periodic prefix to prevent frequency distortion, calculating the time delay between transmission and reception, and spotting timing mistakes. It is clear that the lack of synchronization between the transmitter and channel interference has caused the Signal-to-Noise Ratio (SNR) to decline correspondingly. The initial approach had a piece of code that computed the transmission and reception times while recording their differences. As a result, it handles signal interference and frequency and temporal synchronization, two key aspects of OFDM. Timing precision varies from 0 to 1, and the time gap between transmission and reception is only a fraction of a second. When the SNR was available, timing errors and the lag between transmission and reception timing were seen, which suggests that there is a small probability of having too many locks or losing codes while utilizing OFDM. Simulation exercises show that the suggested method considerably enhances the system's Bit Error Rate (BER) performance in a variety of time offset conditions. The outcomes imply that the suggested strategy could be a workable remedy for OFDM systems with timing issues.

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Section: Related Workmentioning

confidence: 99%

A New Approach to Improve Transmitting and Receiving Timing in Orthogonal Frequency Division Multiplexing (OFDM) Systems

Abed

2023

ijcsm

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“…An interesting lemma, derived in [28], allows us to reduce the computational complexity of left-right side quaternion multiplication of a complex number when we are interested only in the real part of the result. (2.12)…”

Section: Definitions and Main Propertiesmentioning

confidence: 99%

Contributions to communications systems using quaternion algebra

Luis Hinostroza Ninahuanca

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Improved time and frequency synchronization for dual‐polarization OFDM systems

Cited by 2 publications

References 21 publications

A New Approach to Improve Transmitting and Receiving Timing in Orthogonal Frequency Division Multiplexing (OFDM) Systems

A New Approach to Improve Transmitting and Receiving Timing in Orthogonal Frequency Division Multiplexing (OFDM) Systems

Contributions to communications systems using quaternion algebra

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