0 Preface/Foreword
1 调制方式
调制方式包括:
- GFSK:GaussianFSK
- DQPSK:DifferentialQPSK
- DPSK:Differential 8-PSK
1.1 GFSK
GFSK:GaussianFrequencyShiftKeying,高斯频移键控
1.1.1 使用场景
使用场景如下:
- Bluetooth Classic BR (1Mbps)
- BLE 1M PHY
- BLE 2M PHY(仍然是GFSK,只是符号率翻倍)
- BLE coded PHY的基础载波
1.2 DQPSK
DQPSK:DifferentialQuardraturePhaseShiftKeying,差分正交相移键控。
1.2.1 使用场景
Classic Bluetooth EDR 2Mbps中使用的调制方式为DQPSK。
1.3 DPSK
DPSK:DifferentialPhaseShiftKeying,差分相移键控。
1.3.1 使用场景
Classic Bluetooth EDR 3Mbps中使用了DPSK。