Method of differential-phase/absolute-amplitude QAM

Patent · Tue Jul 03 00:00:00 EDT 2007

OSTI ID:913245

Dimsdle, Jeffrey William ^[1]

---

1. Overland Park, KS

A method of quadrature amplitude modulation involving encoding phase differentially and amplitude absolutely, allowing for a high data rate and spectral efficiency in data transmission and other communication applications, and allowing for amplitude scaling to facilitate data recovery; amplitude scale tracking to track-out rapid and severe scale variations and facilitate successful demodulation and data retrieval; 2.sup.N power carrier recovery; incoherent demodulation where coherent carrier recovery is not possible or practical due to signal degradation; coherent demodulation; multipath equalization to equalize frequency dependent multipath; and demodulation filtering.

• Research Organization: Kansas City Plant (KCP), Kansas City, MO (United States)
• Sponsoring Organization: USDOE
• DOE Contract Number: AC04-01AL66850
• Assignee: Honeywell Federal Manufacturing & Technologies, LLC (Kansas City, MO)
• Patent Number(s): 7,239,676
• Application Number: 10/454,804
• OSTI ID: 913245
• Country of Publication: United States
• Language: English

Related Subjects

97 MATHEMATICS AND COMPUTING