Online digital offset mismatch compensation for high-speed time-interleaved ADC in real-time optical OFDM receiver.

Clicks: 295
ID: 96143
2019
Article Quality & Performance Metrics
Overall Quality
Not rated
Combines reader engagement with the AI quality analysis. This article has not been analysed, so there is no overall score — reader engagement is measured and shown alongside.
AI Quality Assessment
Not analyzed
Readership in this journal
Emerging

Ranked #43 of 81 articles by views in Optics express

Most read Least read

Bar heights use a square-root scale.

Mint this article as an NFT
Not yet minted

Create a permanent, verifiable on-chain record of this article on the Scimatic Network. The NFT is held in your Journament account, and you can withdraw it to your own wallet at any time.

5 SUSD one-off · no wallet required
Sign in to mint
Abstract
The time-interleaved analog-to-digital converter (TI-ADC) is a good option to realize high-speed data conversion for both single-carrier and multi-carrier optical communication systems. Offset mismatch is one of its drawbacks, which causes distortion in the sampled data and degrades the bit error rate (BER) performance of communication systems. In this article, a low-complexity online digital offset mismatch compensation (OMC) scheme based on time-domain averaging is proposed and implemented with a commercial off-the-shelf field programmable gate array (FPGA) chip for high-speed optical OFDM communications. The proposed OMC scheme is experimentally demonstrated in real-time direct-detection optical OFDM receiver with a 5 GS/s TI-ADC. The experimental results show that the BER performance can be improved by more than an order of magnitude, by using the proposed OMC scheme, for both 16- and 64-QAM modulation formats. The receiver sensitivity can be improved by more than 5-dB in terms of the received optical power at the BER of 1e-3. What's more, the real-time measured BER performance is similar to that of by using offline DSP approaches and has good stability during the measurement period. Numerical simulations are performed under additive white Gaussian noise (AWGN) channel to fully verify the performance of the OMC scheme. It exhibits that the error floor in BER performance can be eliminated by using the OMC scheme and a negligible signal-to-noise ratio (SNR) penalty can be achieved compared with that of offset mismatch-free case.
Reference Key
chen2019onlineoptics Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors Chen, Ming;Liu, Gang;Zhang, Long;Zhou, Hui;Chen, QingHui;
Journal Optics express
Year 2019
DOI
10.1364/OE.27.016650
URL
Keywords
flexible sensor curved surface head pressure matrix network sensor layout

Citations

No citations found. To add a citation, contact the admin at info@scimatic.org

Comments

No comments yet. Be the first to comment on this article.