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Procedure to map DIBITS in Multi-Modulation Systems

IP.com Disclosure Number: IPCOM000018050D
Original Publication Date: 2001-Dec-01
Included in the Prior Art Database: 2003-Jul-23

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Siemens

Related People

Authors:
Jürgen Schüling Dr. Kalyan Koora [+details]

Abstract

The technical problem refers to changing the modu- lation type during a debit transmission. Until now the problem was solved through the use of several modulators and bit serial processing units. The mapping of dibits is usually achieved by con- verting the parallel inputs to serial and modulating the serial bits. The term dibit is synonym for two parallel bits to double the process speed. The intro- duced procedure (see figure 1) enables the mapping of dibits independent of the modulation type without converting them either into serial bit current or using different modulators. The incoming dibits are first stored in register banks. The switch circuit encodes the dibits depending on the modulation type to the corresponding constellation bits. After resorting the