Bluetooth Frequency Hopping Simulation System

The document describes signal sequence generation and mapping onto frequency hopping frequencies. Signal generation employs a Bernoulli random signal generator module that produces random signals with a frame sampling rate of 10 and sampling time of 1.5e-6. The generated signals undergo preprocessing and are mapped onto a frequency hopping pattern of 1600 hops per second. The frequency hopping modulation adopts the FH-CPM scheme, where the original signal is modulated using CPM to obtain binary symbol sequences with a pulse length of 1. Meanwhile, the frequency hopping signal with a hopping rate of 1600 hops/s undergoes M-FSK modulation, producing a frequency hopping sequence spanning from -39MHz to 39MHz. These two sequences are multiplied together to generate the output signal, which is then transmitted through the communication channel. In the receiver section, demodulation uses the identical random frequency hopping sequence to process the received signal. The demodulation follows the reverse sequence of the preprocessing steps and includes two main subsystems: the FH-CPM Demodulator subsystem and the Disassemble Packet subsystem. Technical Implementation Notes: The Bernoulli generator typically uses random number generation algorithms to create binary sequences. CPM modulation maintains phase continuity between symbols using phase accumulation techniques. M-FSK implementation involves frequency synthesizers that generate discrete frequency tones based on the input symbols. The multiplication operation represents the frequency hopping process where the baseband signal is upconverted to different carrier frequencies according to the hopping pattern. The receiver employs correlation-based detection methods and synchronized frequency hopping pattern generators for proper demodulation.