1 / 4

Nancy List, Ryan Shoup, Tommy Royster HPEC 2010 16 September 2010

Evaluating the Performance of DVB-S2 Over Asymmetric Heterogeneous Optical to Radio Frequency Satellite Links Using the LLGrid. Nancy List, Ryan Shoup, Tommy Royster HPEC 2010 16 September 2010. System Model. Decode. Encode. De-interleave. Interleave. De-frame. Frame. Information Bits.

isolde
Download Presentation

Nancy List, Ryan Shoup, Tommy Royster HPEC 2010 16 September 2010

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Evaluating the Performance of DVB-S2 Over Asymmetric Heterogeneous Optical to Radio Frequency Satellite Links Using the LLGrid Nancy List, Ryan Shoup, Tommy Royster HPEC 2010 16 September 2010

  2. System Model Decode Encode De-interleave Interleave De-frame Frame InformationBits InformationBits Demodulate Modulate Encode Decode AWGN AWGN Interleave De-interleave FadingChannel Frame De-frame Modulate Demodulate Optical Telescope Radio Frequency Receiver Heterogeneous Optical / RF Satellite Communications System

  3. System Parameter Space Major System Architectural Trade 2x End-to-End Decoding Payload Decoding RF Modulation Format 16-APSK QPSK 16-APSK QPSK 3x 8PSK 8PSK 1/2 9/10 1/2 9/10 1/2 9/10 1/2 9/10 DVB-S2 Code Rates 3/5 3/4 3/5 3/4 3/5 3/4 3/5 3/4 2/3 2/3 2/3 2/3 5X 1/2 9/10 1/2 9/10 3/5 3/4 3/5 3/4 2/3 2/3 Soft vs Hard Decision Decoding 2x Soft Hard Soft Hard Soft Hard Soft Hard 8x 6 dB 7 dB 8 dB 9 dB 10 dB 11 dB 12 dB 13 dB UL Photons per Bit 8x 6 dB 7 dB 8 dB 9 dB 10 dB 11 dB 12 dB 13 dB DL Es/No 2 x 3 x 5 x 2 x 8 x 8 = 3840 Simulation Data Points to Run!

  4. Computational Approaches Using LLGrid Good Better Best 100 100 100 Point 1:Node 1, 2,..., 7 End2End BER End2End BER Curve 1, Node 1 Node 2 Point 3:Node 1, 2,..., 7 Curve 2, Node 2 Curve 3, Node 3 Node 4 10-2 10-2 10-2 Curve 4, Node 4 Point 5:Node 1, 2,..., 7 Point 2:Node 1, 2,..., 7 Curve 5, Node 5 Node 1 Node 6 Error Rate Error Rate Error Rate Curve 6, Node 6 Node 3 Point 4:Node 1, 2,..., 7 Curve 7,Node 7 10-4 10-4 10-4 Node 5 Point 6:Node 1, 2,..., 7 Point 7:Node 1, 2,..., 7 Node 7 10-6 10-6 10-6 2.5 3 3.5 4 2.5 3 3.5 4 2.5 3 3.5 4 Photons per Symbol (dB) Photons per Symbol (dB) Photons per Symbol (dB) • Approach: Have each node tackle each data point until the data point is complete • Overcomes shortcomings: Slow nodes do not slow down overall simulation, and nodes do not sit idle • SmartGrid code manages overall simulation • Approach: Pass each data point to a separate node • Short-coming: Some data points will run faster than others. When node finishes data point, it is idle • Approach: Have each node compute a fixed fraction of each data point • Short-coming: Some nodes inevitably run faster than others and will sit idle while slower nodes are finishing

More Related