Data modulation method, and related modulator and...

Details Data modulation method, and related modulator and... Data modulation method, and related modulator and...

H - Electricity

04

L

H04L 27/26 (2006.01) H04L 12/56 (2006.01) H04L 25/03 (2006.01) H04L 27/34 (2006.01) H04Q 11/04 (2006.01)

Patent

CA 2272801

In a single-carrier or multi-carrier modulator (MOD), data symbols are modulated on at least one carrier in accordance with at least one constellation scheme. Idle data symbols are replaced by null data symbols and the latter null data symbols are associated with a low power constellation point of the at least one constellation scheme. The constellation points associated with the data symbols are randomly transformed into constellation points of equal power. In this way, idle data symbols are transferred with minimised power and sufficiently randomised to allow equaliser training and/or tracking at the receiving demodulator (DMOD) and to avoid high crest factors in multi-carrier systems.

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