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Quantum and Quantum-Inspired Computing

for Large-Scale NOMA-MIMO Wireless Networks

Week 4

Interns: Jeffrey Tang, Alex Markley

Advisors: Minsung Kim, Byungjun Kim

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Construct physical implementation of ParaMax: Quantum-Inspired Algorithm for Maximum Likelihood Signal Detection

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Goal

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Progress

Task

Status

Offline Preamble Generation (MATLAB)

Complete

Simultaneous Transmission for Multiple Tx on Grid

Complete

MATLAB Packet Synchronization and Carrier Frequency Offset (CFO) Correction

In Progress

Frame Synchronization on Orbit Grid

In Progress

Creating custom OOT (Python/C++) blocks for GNURadio

Not Started

(2x2) MIMO Preliminary Testing

Not Started

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We are utilizing MATLAB toolbox for WiFi OFDM Preamble to test post- processing on the receiver side. Here are parameters for the Very High Throughput(VHT) Configs:

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MATLAB VHT Config

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ChannelBandwidth: 'CBW20'

NumUsers: 1

NumTransmitAntennas: 1

NumSpaceTimeStreams: 1

SpatialMapping: 'Direct'

STBC: 0

MCS: 0

ChannelCoding: 'BCC'

APEPLength: 1024

GuardInterval: 'Long'

GroupID: 63

PartialAID: 275

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  • Short Training Field(STF) :
    • 10 repeated short symbols (No cyclic prefix)
    • Packet Detection, Time Sync, Coarse Freq Offset
  • Long Training Field(LTF):
    • 2 OFDM signals (cyclic prefix)
    • Channel Estimation, Fine Freq Offset
  • Signal Field (SIG):
    • 1 OFDM signal (cyclic prefix)
    • Helps decode payload

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Wifi Legacy Preamble

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The preamble is used for ensure nodes are synchronized on time slots and minor changes in the frequency can be adjusted for.

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Progress

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Next Steps

  1. Send preamble from multiple nodes (at least 2)
  2. Check preamble at receiver (MIMO rack) and confirm synchronization

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Thank you!

Any Questions?

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