Precoded ternary data transmission

Details Precoded ternary data transmission Precoded ternary data transmission

1974-07-22

1979-12-25

Sloyan, Thomas J.

Communications: electrical

Land vehicle alarms or indicators

Internal alarm or indicator responsive to a condition of the...

325 38A, 340347DD, H04B 162, H04B 166

Patent

active

RE0301825

ABSTRACT:
A digital data transmission rate of three bits per cycle of bandwidth is achieved in precoded partial-response band-limited communication channels by partitioning binary digits into groups of three two-level digits and translating these binary groups of three into pairs of three-level digits prior to transmission. Correct pairwise association of received signals is accomplished by reserving a three-level digit pair for monitoring purposes. This reserved pair can validly occur only at a transition between allowable pairs. By monitoring the presence of the reserved pair, correct pairwise association of ternary digits is assured and binary digits are properly decoded without having to provide a special framing signal.

REFERENCES:
patent: 3175157 (1965-03-01), Mayo et al.
patent: 3492578 (1970-01-01), Gerrish et al.
patent: 3518662 (1970-06-01), Nakogome et al.

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