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Major characteristics of Bluetooth

Short answer

Bluetooth uses 2.4 GHz ISM band, frequency hopping over 79 channels at 1600 hops/s, GFSK (and EDR) modulation, 1–3 Mbps rates, piconet with one master and up to seven slaves, TDD slots, low power with ranges up to 100 m, and supports SCO/ACL links.

List the major characteristics of Bluetooth.

Major characteristics of Bluetooth:

  1. Frequency band: 2.4 GHz ISM band (2.402-2.480 GHz), licence free.
  2. Spread spectrum: frequency hopping over 79 channels of 1 MHz, 1600 hops/s.
  3. Modulation: GFSK (1 Mbps); EDR uses pi/4-DQPSK and 8DPSK (2-3 Mbps).
  4. Data rate: 1 Mbps (v1.x), 3 Mbps (EDR), up to 24 Mbps (high speed); BLE 1-2 Mbps.
  5. Range: class 1 about 100 m (100 mW), class 2 about 10 m (2.5 mW), class 3 about 1 m (1 mW).
  6. Topology: piconet (1 master + 7 active slaves) and scatternet.
  7. Time division duplex with 625 us slots; SCO links (voice) and ACL links (data).
  8. Low power and low cost, small chips; BLE for coin-cell devices.
  9. Security: pairing, authentication and encryption.
  10. Ad hoc, automatic connection and service discovery; omnidirectional, no line of sight needed.

✓ Answer checked by Claude Sonnet 5.5

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