AT48802 Description
The AT48802 Spread-Spectrum Signal Processor (SSSP) chip from Atmel handles all PN code generation, synchronization, and handshaking required for either station (handset or base station) of a time division duplex direct sequence spread-spectrum cordless telephone. The AT48802 supports RF spreading and despreading for the best rejection of interference. In conjunction with a single-chip microcontroller, the circuit...
AT48802 Key Features
- Generates a pseudo-random sequence for spreading the transmitted signal
- Generates a pseudo-random sequence for despreading in the receiver
- Generates a sliding phase PN for acquiring synchronization with an ining signal
- Controls receive signal strength measurement timing for correlation peak detection
- Operates a tau-dither tracking loop, with adaptive threshold, to maintain synchronization with the ining signal
- Controls transmit keying antenna switching for time-division duplexing