Hai Y Chen

US Patent:

20140035693, Feb 6, 2014

Filed:

Apr 14, 2011

Appl. No.:

14/111582

Inventors:

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).