Method and apparatus to increase efficiency of systematic codes

Details Method and apparatus to increase efficiency of systematic codes Method and apparatus to increase efficiency of systematic codes

1993-12-29

1996-01-02

Chin, Stephen

Pulse or digital communications

Systems using alternating or pulsating current

375295, 375316, 375341, 371 371, H04L 2700

Patent

active

054815665

ABSTRACT:
A method and apparatus for increasing the coding efficiency of a digital data transmission system from k
to (k+1)
by truncating a check bit from a generated checkword and adding an extra information bit prior to transmission. The encoding algorithm at the receiver borrows the added information bit to replace the truncated check bit in order to perform error detection and correction n the entire codeword. If an error is detected at the shared bit position, the shared bit is not corrected by the decoding circuit since a detected error in that position is more likely a result of bit inversion due to replacement than due to a transmission fault. The coding efficiency of the transmission system is increased from k
to (k+1)
while the number of bit errors correctable by the system is only reduced to, on the average, t-(1/2) for some range of BER's.

REFERENCES:
patent: 3697949 (1972-10-01), Carter et al.
patent: 4077028 (1978-02-01), Lui et al.
patent: 4107650 (1978-08-01), Luke et al.
patent: 4156867 (1979-05-01), Bench et al.
patent: 4312069 (1982-01-01), Ahamed
patent: 4488302 (1984-12-01), Ahamed
patent: 4605921 (1986-08-01), Riddle et al.
patent: 4691319 (1987-09-01), Bose et al.
patent: 4744086 (1988-05-01), Komly et al.
patent: 4763331 (1988-08-01), Matsumoto
patent: 4849976 (1989-07-01), Schilling et al.
patent: 4899340 (1990-02-01), Lubarsky
patent: 5010554 (1991-04-01), Bechtel et al.
patent: 5179560 (1993-01-01), Yamagishi et al.
patent: 5379305 (1995-01-01), Wang
"Error Control Coding Fundamentals & Applictions" Castello, Jr. et al. Prentice-Hall Inc., 1987.

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