Multiple quadrature-phase amplitude modulating system...

Details Multiple quadrature-phase amplitude modulating system... Multiple quadrature-phase amplitude modulating system...

H - Electricity

04

L

329/21, 332/64

H04L 27/02 (2006.01) H04L 27/34 (2006.01)

Patent

CA 1251526

Abstract of the Disclosure: In a multiple QAM system in which a pair of quadrature-phase carrier signals is modulated by a first and a second input digital signal, each representative of N or less levels, into a quadrature-phase amplitude modulated signal having M signal points on a phase plane where M is equal to N2, a code converting unit (41) converts the digital signals according to a predetermined rule into a first and a second modulating signal for use in modulating the carrier signals with the M signal points arranged approximately at a circle of a diameter which is shorter than a diagonal of a square of a side corresponding to the N levels. In a counterpart demodulat- ing system, a pair of demodulated signals is derived from the amplitude modulated signal and converted into reproductions of the respective digital signals according to an inverse of the predetermined rule.

491461

Affiliated with

Also associated with

Rating

Multiple quadrature-phase amplitude modulating system... does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Multiple quadrature-phase amplitude modulating system..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Multiple quadrature-phase amplitude modulating system... will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFCA-PAI-O-1332409