Dr. Shelton graduated from the Vanderbilt University School of Medicine in 1984. He works in Effingham, IL and 2 other locations and specializes in Cardiovascular Disease. Dr. Shelton is affiliated with Dr John Warner Hospital, HSHS Saint Anthonys Memorial Hospital, Memorial Medical Center, Pana Community Hospital, Saint Johns Hospital and Saint Marys Hospital.
Us Patents
Method And Apparatus For Implementing High-Order Modulation Schemes Using Low-Order Modulators
Zheng Li - Livingston NJ, US Rong Zhang - Nanjing, CN Guoyong Chen - Nanjing, CN Doug Clark - Mendham NJ, US Hai Chen - Montville NJ, US Yu Wan - Nanjing, CN Jiaguan Leng - Nanjing, CN Marc Shelton - Palatine IL, US
Assignee:
ALCATEL LUCENT - Paris
International Classification:
H03C 5/00
US Classification:
332103
Abstract:
A processing device includes a plurality of modulators, the plurality of modulators performing modulation according to a first modulation scheme, a combiner configured to combine outputs from the plurality of modulators, and a signal processor configured to receive a bit stream and convert the bit stream into a plurality of input signals for the plurality of modulators such that the combiner generates a modulated output according to a second modulation scheme. The plurality of modulators may be low order modulators and a modulation schemes of the modulated output may include, for example, rotated quadrature phase shift keying (QPSK), pulse amplitude modulation (PAM), high order quadrature amplitude modulation (QAM), and multi-resolution high order quadrature amplitude modulation (M-QAM).