| 摘要 |
The present invention is directed to a frequency hopping spread spectrum transceiver. The transceiver includes a microcontroller (110); a transmitter (120) having a voltage controlled oscillator (122), a direct digital synthesizer (124), and a power amplifier (126); and a receiver having an amplifier (128), an IF amplifier (132), a demodulator (134), and a data slic er (138). When transmitting, the transmitter sends a preamble that allows the receiving device to detect the signal and lock to it to receive the data. Wh en receiving, the receiver first scans all channels and sorts them based on a Received Signal Strength Indicator (RSSI) and then attempts to lock to the channel with the strongest RSSI value by first sampling the received signal to verify the preamble, then synchronizing to the bit edges of the received signal, then detecting the start of a Start Frame Delimiter (SFD), decoding bits to verify a valid SFD and then sampling data bits to receive the data.< /SDOAB>
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