Real-time FPGA prototyping of Doppler frequency shift compensation using DSP-assisted automatic frequency control

Xinpei Tang; Yan Li; Jingwei Song; Hongxiang Guo; Xiaobin Hong; Jifang Qiu; Zhisheng Yang; Jian Wu

doi:10.1364/OL.518629

Optics Letters
Vol. 49,
Issue 9,
pp. 2469-2472
(2024)
•https://doi.org/10.1364/OL.518629

Real-time FPGA prototyping of Doppler frequency shift compensation using DSP-assisted automatic frequency control

Xinpei Tang, Yan Li, Jingwei Song, Hongxiang Guo, Xiaobin Hong, Jifang Qiu, Zhisheng Yang, and Jian Wu

Not Accessible

Your library or personal account may give you access

Get PDF
Email
Share
Get Citation
Copy Citation Text
Xinpei Tang, Yan Li, Jingwei Song, Hongxiang Guo, Xiaobin Hong, Jifang Qiu, Zhisheng Yang, and Jian Wu, "Real-time FPGA prototyping of Doppler frequency shift compensation using DSP-assisted automatic frequency control," Opt. Lett. 49, 2469-2472 (2024)

Export Citation
- BibTex
- Endnote (RIS)
- HTML
- Plain Text
Citation alert
Save article

Check for updates

Abstract

This Letter presents a real-time coherent receiver using digital signal processing (DSP)-assisted automatic frequency control (AFC) to compensate for the Doppler frequency shift (DFS). DFS compensation range of ±8 GHz and the frequency shifting rate of 33 MHz/s are demonstrated in an FPGA-based 2.5 Gbaud QPSK coherent optical system. The experimental results indicate that the scheme achieves a sensitivity of −47 dBm at a bit error rate (BER) of 2E-4. The power penalty induced by the DFS compensation is less than 1 dB.

Full Article | PDF Article

More Like This

Turbulence mitigation of four mode-division-multiplexed QPSK channels in a pilot-assisted self-coherent free-space optical link using a photodetector array and DSP-based channel demultiplexing

Huibin Zhou, Hao Song, Xinzhou Su, Yuxiang Duan, Kaiheng Zou, Runzhou Zhang, Moshe Tur, and Alan E. Willner
Opt. Lett. 49(5) 1209-1212 (2024)

Real-time demonstration of two-aperture coherent digital combining free-space optical transmission with a real-valued MIMO adaptive equalizer

Cheng Ju, Na Liu, Dongdong Wang, Danshi Wang, Jingze Yu, and Yue Qiu
Opt. Lett. 49(4) 903-906 (2024)

Multiplication-free and hardware-efficient baud-rate timing error detector for Nyquist and faster than Nyquist optical IM/DD systems

Jianwei Tang, Jinlong Wei, Junpeng Liang, Zhaopeng Xu, Tianfeng Zhao, Chen Cheng, Yaguang Hao, Bang Yang, Zhongliang Sun, Ke Li, Yunchen Li, Lingjun Zhou, Zhixue He, Yanfu Yang, and Weisheng Hu
Opt. Lett. 49(9) 2353-2356 (2024)

Previous Article Next Article

Data availability

Data underlying the results presented in this paper are not publicly available at this time but may be obtained from the authors upon reasonable request.

Cited By

You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Figures (5)

You do not have subscription access to this journal. Figure files are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Tables (2)

You do not have subscription access to this journal. Article tables are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Schemes		Maximum DFS Range (Rate)	Symbol Rate	Modulation Format	Real-time or Offline	Pilot-assisted or Blindy	Orbit Information Assistance
Based on OPLL	OIPLL [7]	±5.15 GHZ (32.4 GHz/s)	10 Gbaud	BPSK	Real-time	Blindy	Not required
Based on OPLL	Costas OPLL assisted by orbit information [6]	±7.5 GHz (100 MHz/s)	2.5 Gbaud	BPSK	Real-time	Blindy	Required
Based on DSP	DSP assisted by High bandwidth receiver [9]	+10 GHz (NA)	64 Gbaud	16QAM	Offline	Blindy	Not required
	DSP assisted by pilot [10]	±1.5 GHz (NA)	3 Gbaud	QPSK	Real-time	Pilot-assisted	Not required
	DSP assisted by orbit information [11]	±920 MHz (40 MHz/s)	2.5 Gbaud	QPSK	Real-time	Blindy	Required
	This Letter	±8G Hz (33 MHz/s)	2.5 Gbaud	QPSK	Real-time	Blindy	Not required

Resource	DSP	Laser Control	DSP & Laser Control
LUT	100,396 (5.8%)	20,579 (1.2%)	120,975 (7.0%)
Reg.	104,995 (3.0%)	39,364 (1.2%)	144,359 (4.2%)
BRAM	530 (19.7%)	35 (1.3%)	565 (21.0%)
DSP48	96 (0.8%)	0 (0%)	96 (0.8%)

Schemes		Maximum DFS Range (Rate)	Symbol Rate	Modulation Format	Real-time or Offline	Pilot-assisted or Blindy	Orbit Information Assistance
Based on OPLL	OIPLL [7]	±5.15 GHZ (32.4 GHz/s)	10 Gbaud	BPSK	Real-time	Blindy	Not required
Based on OPLL	Costas OPLL assisted by orbit information [6]	±7.5 GHz (100 MHz/s)	2.5 Gbaud	BPSK	Real-time	Blindy	Required
Based on DSP	DSP assisted by High bandwidth receiver [9]	+10 GHz (NA)	64 Gbaud	16QAM	Offline	Blindy	Not required
	DSP assisted by pilot [10]	±1.5 GHz (NA)	3 Gbaud	QPSK	Real-time	Pilot-assisted	Not required
	DSP assisted by orbit information [11]	±920 MHz (40 MHz/s)	2.5 Gbaud	QPSK	Real-time	Blindy	Required
	This Letter	±8G Hz (33 MHz/s)	2.5 Gbaud	QPSK	Real-time	Blindy	Not required

Resource	DSP	Laser Control	DSP & Laser Control
LUT	100,396 (5.8%)	20,579 (1.2%)	120,975 (7.0%)
Reg.	104,995 (3.0%)	39,364 (1.2%)	144,359 (4.2%)
BRAM	530 (19.7%)	35 (1.3%)	565 (21.0%)
DSP48	96 (0.8%)	0 (0%)	96 (0.8%)

Abstract

Data availability

Cited By

Figures (5)

Tables (2)

Optics Letters