DQPSK (Differential Quaternary Phase Shift Keying)

Also known as Differential Quadrature Phase

Shift Keying. A variation on the QPSK modulation technique, DQPSK relies on the difference between successive phases of a signal rather than the absolute phase position. DQPSK is commonly used in cellular radio systems and other radio systems, such as LMDS. See also cellular radio, LMDS, π /4 DQPSK, PSK, and QPSK.

• narrowcast
• NAS
• NA-TDMA (North American Time Division Multiple Access)
• National Bureau of Standards (NBS)
• National Do-Not-Call Registry
• National Electrical Code (NEC)
• National Exchange Carrier Association (NECA)
• National Information Infrastructure (NII)
• National Institute of Standards and Technology (NIST)
• National Internet Registry (NIR)
• nationalize
• National Research and Education Network (NREN)
• National Science Foundation (NSF)
• National Television Standards Committee (NTSC)
• native
• NAT (Network Address Translation)
• natural monopoly
• NBS (National Bureau of Standards)
• NCC (Network Control Center)
• NCP
• NCSA Mosaic
• NCSA Mosaic
• NDSF (Non Dispersion-Shifted Fiber)
• NDSF (Non Dispersion-Shifted Fiber)
• near-end cross talk (NEXT)