Synchronisation algorithm based on zero correlation code pair for OFDM‐based VLC systems

Xing-san, Qian; Deng, Yansha; Deng, Haixiao; Hu, Yue; Zhang, Chaoyang; Du, Jie

doi:10.1049/iet-com.2016.0899

Cited by 18 publications

(9 citation statements)

References 15 publications

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“…In previous work, Zero-correlation-code (ZCC) pair [6] is proposed to synchronize signal in OFDM-based VLC systems by using the impulse-like periodic correlation relationship. This can be exploited in pilot-based channel estimation with some modifications.…”

Section: Modified Zero-correlation-code Pairmentioning

confidence: 99%

“…Thus, orthogonal frequency division multiplexing (OFDM) technique is introduced into VLC systems to combat the multi-path effect. Due to intensity modulation and direct detection in most VLC systems, many OFDM-based VLC systems [1,2,3,4,5,6] resort to the direct current-biased OFDM modulation schemes to enable signals to be positive which is different from radio OFDM systems.…”

Section: Introductionmentioning

confidence: 99%

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Pilot-based parametric channel estimation algorithm for DCO-OFDM-based visual light communications

Xing-san

Deng

2017

Optics Communications

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Due to wide modulation bandwidth in optical communication, multipath channels may be non-sparse and deteriorate communication performance heavily. Traditional compressive sensing-based channel estimation algorithm cannot be employed in this kind of situation. In this paper, we propose a practical parametric channel estimation algorithm for orthogonal frequency division multiplexing (OFDM)-based visual light communication (VLC) systems based on modified zero correlation code (ZCC) pair that has the impulse-like correlation property. Simulation results show that the proposed algorithm achieves better performances than existing least squares (LS)-based algorithm in both bit error ration (BER) and frequency response estimation.

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Section: Modified Zero-correlation-code Pairmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Pilot-based parametric channel estimation algorithm for DCO-OFDM-based visual light communications

Xing-san

Deng

2017

Optics Communications

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“…In view of the constraint conditions of non-negative and real-valued symbols in the VLC system, researchers have done a lot of research on timing synchronization for DCO-OFDM [13][14][15][16]. A timing synchronization algorithm based on the Shapiro-Rudin sequence presented by Guerra on the basis of the Park algorithm to improve the accuracy of timing synchronization [13].…”

Section: Introductionmentioning

confidence: 99%

A Novel Timing Synchronization Method for DCO-OFDM-Based VLC Systems

2021

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Being sensitive to synchronization errors, symbol timing synchronization is a key factor affecting the performance of orthogonal frequency division multiplexing (OFDM) -based visible light communication (VLC) systems. A novel timing synchronization method based on odd-even symmetry for direct current biased optical OFDM (DCO-OFDM) is investigated in this paper. The proposed method produces an excellent pulse-like timing metric, resulting in a sharper peak at the correct place, while the values of other parts are negligible. The performance of the proposed timing synchronization approach is assessed by measuring the root mean squared error (RMSE) and mean absolute error (MAE) of timing offset estimation and bit error rate (BER) performance by computer simulation. The simulation results show that this novel symbol timing synchronization approach is superior to the typical methods for DCO-OFDM, such as the Park method and Guerra method, in various channel environments.

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“…Moreover, the optical wireless access data rates are being enhanced to ∼100 Gbit/s [10]. VLC systems based on orthogonal frequency division multiplexing are promising for their ability to link a very high number of devices with high reliability and low latency [11,12]. Infrared links are typically used to solve the uplink challenge in indoor VLC [13].…”

Section: Introductionmentioning

confidence: 99%

Improved visible light communication positioning algorithm based on image sensor tilting at room corners

Zhu

et al. 2018

IET Communications

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Synchronisation algorithm based on zero correlation code pair for OFDM‐based VLC systems

Cited by 18 publications

References 15 publications

Pilot-based parametric channel estimation algorithm for DCO-OFDM-based visual light communications

Pilot-based parametric channel estimation algorithm for DCO-OFDM-based visual light communications

A Novel Timing Synchronization Method for DCO-OFDM-Based VLC Systems

Improved visible light communication positioning algorithm based on image sensor tilting at room corners

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