04030033 is referenced by 103 patents and cites 4 patents.

A method and apparatus for transmitting a message, in digital form, to or from a remote location. In a transmitter, a sequence of predetermined multiple-bit phase codes corresponding to the individual characters in the message phase modulate a carrier wave which also shifts frequency. At a receiving station, the various modulated carrier waves propagated through a dispersive medium constitute incoming signals with both frequency and range diversity. The receiver transforms the incoming signals into a sequence of quadrature component signals which it correlates with the multiple-bit phase code sequences to yield the digital representation of a transmitted message character at the receiving station.

Title
Method and apparatus for transmitting messages to and from remote locations
Application Number
5/586538
Publication Number
4030033
Application Date
June 13, 1975
Publication Date
June 14, 1977
Inventor
Bodo W Reinisch
Bedford
MA, US
Klaus Bibl
Belmont
MA, US
Agent
Pearson & Pearson
Assignee
Lowell Technological Institute Research Foundation
MA, US
IPC
H04B 7/02
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