AMATEUR RADIO STATION

NQ6N

Matthew Murphy • November Quebec Six November
UTC CLOCK --:--:-- UTC
GRID LOCATOR EN61wr
COORDINATES 41.73° N, 86.13° W

Engineering at the Intersection of Radio Waves, DSP & Psychoacoustics

High-performance amateur radio station focusing on high-speed CW radiosport, custom software-defined radio architecture, real-time digital signal processing, and low-noise directional antenna arrays.

Licensure Timeline:
KB8HAN First Licensed
➔
KF8QE Former Call
➔
NQ6N Amateur Extra

Core Areas of Focus

⚡

Radiosport & Contesting

Operating competitive high-rate HF competitions (CW Sprint, CQ WW, ARRL DX). Optimizing human-machine interfaces, ergonomics, and auditory focus during high-density multi-signal pileups.

  • High-Rate Sprint
  • Pileup Management
  • Operator Ergonomics
📻

Continuous Wave (CW)

High-speed Morse code communication, auditory stream segregation, and ultra-fast full break-in (QSK) keying. Research into how the human auditory cortex isolates overlapping CW tones in noise.

  • High-Speed Morse
  • Bregman Stream Analysis
  • Full QSK Break-in
💻

Software Defined Radio (SDR)

Architecting real-time DSP pipelines, low-latency audio transports, and advanced receiver signal processing. Research into wide dynamic range processing, sub-band filtering, and psychoacoustic AGC algorithms.

  • Real-Time DSP
  • Low-Latency Transports
  • Psychoacoustic AGC
📡

Antenna Array Design

Modeling, constructing, and testing directional HF antenna arrays. Low-noise spatial receiving arrays (phased verticals, steerable loops) and impedance matching networks to optimize front-to-back signal-to-noise ratios.

  • Phased Arrays
  • Spatial Beamforming
  • Low-Noise HF RX

Projects & Interactive Research

INTERACTIVE LAB

AGC Psychoacoustic Laboratory

A real-time WebAudio & DSP simulation lab designed to explore how the human ear perceives receiver Automatic Gain Control algorithms under challenging HF conditions: CW pileups, rapid Rayleigh flutter, and near-noise weak signal work.

• Sub-Band Critical-Band AGC • Frozen-Hang Dynamic Control • Noise-Adaptive Floating Knee • Binaural (BMLD) Spatial Unmasking
Launch AGC Lab (agclab.nq6n.com) ➔
MODELING & RF

Directional Receiving Arrays & Spatial Filtering

Electromagnetics modeling and real-world field experimentation with phased arrays and steerable low-noise receiving loops. Exploring mutual coupling, spatial null-steering, and front-to-back ratio optimization for weak-signal HF reception.

Field Research & Modeling

Station Profile

Callsign
NQ6N
Operator
Matthew Murphy
Location
EN61wr (Michiana / Great Lakes)
Prior Calls
KB8HAN, KF8QE
Primary Rig
Direct-Sampling SDR Architecture
Interests
CW, Radiosport, SDR DSP, Antenna Arrays

Maidenhead Grid EN61wr

EN61wr
Latitude: 41° 43' 45" N
Longitude: 86° 07' 30" W
ITU Zone: 8 • CQ Zone: 4