Method and apparatus for robust communication based upon angular

Details Method and apparatus for robust communication based upon angular Method and apparatus for robust communication based upon angular

1996-06-10

1998-10-27

Baker, Stephen M.

Excavating

371 3702, 371 3706, 371 42, 375329, 375330, 375365, 375371, H03M 1300, H04L 700, H04L 704, H04L 2722

Patent

active

058286764

ABSTRACT:
A robust encoding and decoding system of the present invention for communicating binary information using angular modulation system is disclosed. Binary information to be transmitted is data words consisting of 8 data bits, a parity bit, and two additional coding bits at the end of the data word. A transmitter transmits the data words using a binary phase-shift keying (BPSK) modulated signal. The receiver compares the phase of incoming BPSK modulated signal against a local reference signal and records the phase characteristics of the BPSK signal. The receiver also records the amplitude of the recovered data signal. The receiver demodulates and decodes the BPSK signal using a rotating frame of reference that tracks the current phase of the recovered data signal. The receiver tests the parity bit of each word to detect errors. If an error is detected, the receiver attempts to correct the error using the record phase and amplitude information.

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