Spread spectrum communication transmitter an LSI therefor

Details Spread spectrum communication transmitter an LSI therefor Spread spectrum communication transmitter an LSI therefor

1994-04-08

1996-03-19

Cangialosi, Salvatore

Pulse or digital communications

Repeaters

Testing

375200, H04B 169

Patent

active

055008712

ABSTRACT:
High-sensitivity transmission can be performed in a wide temperature range, and spread spectrum communication free from jitters and bit errors in high-speed digital signal transmission can be performed. There is provided a spread spectrum communication transmitter for performing FSK modulation for switching the frequency in correspondence with the level of each bit of the serial digital data, performing spread spectrum modulation of a resultant FSK-modulated signal, and transmitting the data, wherein an FSK modulation unit (1) for performing the FSK modulation has a direct digital synthesizer and a synchronization circuit (19) is arranged to synchronize an FSK signal having a frequency corresponding to at least one level of the each bit with a PN code for the spread spectrum modulation.

REFERENCES:
patent: 4951237 (1990-08-01), Essenwanger
patent: 5280499 (1994-01-01), Suzuki
patent: 5323418 (1994-06-01), Ayerst et al.

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