SDR Communication Chain Introduction
Walk through a complete software-defined radio transmit-receive chain, from modulation constellation to ADC SNR.
1
Modulation Constellation Design
Choose QAM/PSK order, map bits to constellation points, and evaluate PAPR and demodulation threshold.
2
Spread Spectrum & PN Code
Design PN code sequences for direct-sequence spread spectrum, and compute processing gain and anti-jamming capability.
3
RF Link Budget & Sensitivity
Calculate transmit power, path loss, and receive sensitivity to ensure link margin meets BER requirements.
4
Noise Cascade & ADC SNR
Use the Friis formula to cascade noise figures across stages, and evaluate how ADC quantization SNR affects overall system performance.