Transmitter and receiver

Details Transmitter and receiver Transmitter and receiver

2002-02-25

2009-06-23

Fan, Chieh M. (Department: 2611)

Pulse or digital communications

Receivers

C375S224000, C375S227000, C714S804000, C714S758000, C370S474000, C370S537000

Reexamination Certificate

active

07551690

ABSTRACT:
A transmitter (1) converts an input signal from a microphone (2) into a plural-bit digital signal by means of an A/D converter (4) at predetermined time intervals. An encoder (6) divides the digital signal into plural blocks and adds a parity bit to each block to thereby form a coded signal. A transmitting unit (8) modulates a carrier with the coded signal and transmits the modulated carrier through an antenna (10). A receiver (12) includes two tuning units (18A,18B). Corresponding coded signals outputted from the tuning units (18A,18B) are inputted to a decoder (20). The decoder (20) makes a parity check on respective blocks of the corresponding coded signals and selects and outputs an error-free one of the corresponding blocks of the corresponding coded signals.

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