04937844 is referenced by 79 patents and cites 18 patents.

A data modem includes a data compression circuit which compresses incoming data prior to transmission. The compression ratio obtained from the compression process is used to select a constellation for transmission of the data. When higher compression rates are achieved, fewer constellation points (symbols) representing fewer bits per point are transmitted. In this manner, incoming data rate can be held constant while utilizing a more robust constellation which has greater immunity to transmission line impairments. This reduces errors and retransmissions which can ultimately lead to reduction in effective throughput in conventional systems.

Title
Modem with data compression selected constellation
Application Number
7/269812
Publication Number
4937844
Application Date
November 3, 1988
Publication Date
June 26, 1990
Inventor
Ming Luh Kao
Miami
FL, US
Agent
Jerry A Miller
Assignee
Racal Data Communications
FL, US
IPC
H04B 1/66
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