What are the RF requirements for Bluetooth 5 and Bluetooth Low Energy?

What are the RF requirements for Bluetooth 5 and Bluetooth Low Energy (BLE) for IoT and wearable applications? Bluetooth 5 and BLE operate in the 2.4 GHz ISM band (2.400-2.4835 GHz) with specific RF parameters optimized for low power, short range, and reliable connectivity: (1) Frequency and modulation: frequency: 2402-2480 MHz (40 channels, 2 MHz spacing for BLE; 79 channels, 1 MHz spacing for BR/EDR). BLE modulation: GFSK (Gaussian Frequency Shift Keying) with BT = 0.5. 1 Mbps (LE 1M PHY): ±250 kHz deviation, 1 MHz channel. 2 Mbps (LE 2M PHY): ±500 kHz deviation, 2 MHz channel. Coded PHY (LE Coded): 1 Mbps symbol rate with coding (S=2: 500 kbps, S=8: 125 kbps). (2) Transmit power: power classes: Class 1: +20 dBm (100 mW) maximum. Class 1.5: +10 dBm (10 mW) maximum (new in Bluetooth 5.0). Class 2: +4 dBm (2.5 mW) maximum. Class 3: 0 dBm (1 mW) maximum. Most BLE devices use Class 2 or Class 3 (0 to +4 dBm) for battery efficiency. The PA for BLE is typically integrated into the SoC (single-chip solution). External PA optional for Class 1 applications (long range). (3) Receiver sensitivity: LE 1M: ≤ -70 dBm (for BER = 10^-3). Many chips achieve -95 to -100 dBm. LE 2M: ≤ -70 dBm. LE Coded S=8: ≤ -75 dBm. The coded PHY extends the range by approximately 4× (12 dB coding gain) compared to LE 1M at the same transmit power. (4) Range: typical BLE range (Class 2, 0 dBm, LE 1M): 10-30 m (indoor), 50-100 m (outdoor, line of sight). With Bluetooth 5 LE Coded (S=8, +10 dBm): 200-400 m (outdoor LOS). Range extension options: increase TX power (external PA), use coded PHY (coding gain), and optimize antenna design.