Communication device and communication method

Details Communication device and communication method Communication device and communication method

2004-12-23

2010-06-01

Liu, Shuwang (Department: 2611)

Pulse or digital communications

Spread spectrum

C375S136000, C375S145000, C375S147000, C375S149000, C375S150000

Reexamination Certificate

active

07729405

ABSTRACT:
A communication device performs a radio communication in an ultra wideband with the use of the impulse radio system. The communication device includes a receiver. The receiver is equipped with antennas, a correlation circuit, and a CPU. The antennas receive send signals from a transmitter. The correlation circuit detects a synchronization pulse having a longer cycle than a highly redundant data pulse among received signals. The CPU performs a synchronization process based on the synchronization pulse. The CPU establishes a channel based on the synchronization pulse, and selectively changes the antennas according to the received signal. In the case where the receive signal has not been received for a given period of time after the synchronization is established correlation signals is stopped outputting to start a polling signal. The correlation signals are output to obtain correlation of the receive signals.

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