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Zcu111ResmReceiver/docs/pl_tx_subsystem.md
2026-04-02 17:32:03 -03:00

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# 📡 PL Tx Subsystem (Pulse Generator)
## Overview
The Tx subsystem implements a pulse-based LFM chirp generator using a DDS/NCO architecture.
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## Architecture
TxPulseStart → pulse_gen_ctrl → tx_active → NCO → Output
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## Chirp Generation
Δφ[n] = Δφ[n1] + step
φ[n] = φ[n1] + Δφ[n]
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## Parameterization
- Fc (center frequency)
- B (bandwidth)
Derived:
f_start = Fc B/2
step = B / (N 1)
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## Pulse Timing
|<------ PRI ------>|
|<-- pulse -->| idle |
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## Trigger
Controlled via TxPulseStart (from PS subsystem)
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## 🔗 Related Components
- [Project Overview (README)](../README.md)
- [PS Subsystem](ps_subsystem.md)
- [PL Rx Subsystem](pl_rx_subsystem.md)