Watermark使用

---

The Watermark Benchmark for Underwater Acoustic Modulation Schemes. Paul A. van Walree et.al. IEEE Journal of Oceanic Engineering, October 2017 (pdf) (Citations 182)

Quick Overview

• Time-varying impluse response
• Three places
• Three frequency bands
• play time need to equal the measurement time
• Ocean noise can be colored

---

Condition and environment

---

Details in NOF1

First arrival has no Doppler spread.

---

NCS1 and others scenario are more complicated.

PRINCIPLES OF OPERATION

• Passband signal, not Baseband.
• Time and frequency requirement.
• Matlab Platform

Performance

• 都是单载波

• DNSS效果还不错？但是效率很低；