NEC's Ultra-Compact Microwave Communications System, PASOLINK, Surpasses 1 million Shipments Oct 3, 2008
The system used in PASOLINK NEO HP is a 256QAM (Quadrature Amplitude Modulation) system which has increased information transmission rates on the same bandwidth by more than 4 times when compared with QPSK (Quadrature Phase Shift Keying) systems. (*2) AMR (Adaptive Modulation Radio Functions)AMR is a technology that improves throughput by automatically changing the modulation method and/or transmission rate in response to radio link quality. (JCN Network, Japan)
IBC 2008 Exhibitor Profiles Sep 5, 2008
000W VHF UHF bands), digital modulators (OFDM DVB-T/H; QPSK DVB-S; QPSK/8PSK/16QAM DVB-DSNG), microwave links (2 to 23GHz), antennas, MPEG-2 encoders/multiplexers. . (Yahoo! Wire -- Entertainment News)
Group crafts spec for 100G networking Aug 14, 2008
"Carriers are already conducting trials because they want to deploy 100G systems as soon as possible and we are feeling that pressure," said Karl Gass, chair of an OIF working group that helped pick the so-called Dual-Polarization Quadrature Phase Shift Keying (DP-QPSK) technology. "Choosing a modulation scheme is just the beginning of this project," said Gass, who is also a researcher at Sandia National Labs. (EETimes)
Comcast to Conduct First Live 100G Network Trial with Nortel ... Mar 15, 2008
The 100G cards utilize Nortel's 40G/100G Adaptive Optical Engine, with integrated dispersion compensation and dual-polarization Quadrature Phase Shift Keying (QPSK) modulation, the same technology used in Nortel's present 40G solution. About Comcast Corporation. (CNNMoney.com)
NEC is on wireless, long-haul run Feb 7, 2008
6-Gbps using quadrature-phase-shift-keying (QPSK) modulation. Software radio rolls. (EETimes)
NEC Develops 60-GHz-Band CMOS Transceiver With World's Highest Output Power Feb 6, 2008
6-Gbps data transmission under quadrature-phase-shift-keying (QPSK) modulation. The new technology is applicable to short-range wireless networking systems and is expected to realize new applications for low-cost 60-GHz equipment for wireless transmission of HDTV signals and ultra-fast, wireless down-loading systems. (PR Newswire)
How do you test ZigBee transmitters? Dec 26, 2007
4-GHz band, in which ZigBee transceivers are most commonly deployed, uses the offset quadrature phase-shift-keyed (OQPSK) modulation scheme. This is a derivation of traditional QPSK and is used because it requires less power than similar schemes while achieving the same level, or better, of throughput ... OQPSK uses a maximum phase transition of 90. (EETimes)
Saving transponder bandwidth Nov 26, 2007
Satellites traditionally use a form of modulation called QPSK, for quadrature phase shift key ... To put it in context, the QPSK modulation used for space transmissions is also used by cable systems to transmit in the upstream (home to headend) direction. (Multichannel News)
Provigent extends backhaul chip modem range Nov 16, 2007
The modem technology performs encoding and offers QPSK through 256QAM modulations. The embedded high performance DAC converts the modulated signal into analog for IF transmission. (EETimes)
Lockheed Martin's THAAD Weapon System Conducts Successful Exo-Atmospheric Interceptor Test Oct 28, 2007
617 msps and a QPSK of 3/4 Trouble number for feed #1: Greg Romaniak, (630) 440-0085 2 ... 4000 Polarization : Vertical QPSK: 3/4 Symbol Rate: 3. (PR Newswire)
Ultrawideband SoCs pose new challenges to manufacturers Oct 16, 2007
Having both baseband and RF modulation and demodulation libraries that can easily evaluate an IEEE defined OFDM standard (such as BPSK, QPSK, 16 QAM, 64 QAM and multiple subcarriers in baseband and RF) is a necessity. Otherwise, many hours will be spent recreating or correlating to core OFDM modulation files. (EETimes)
Broadcom Announces Industry's First Fully Integrated, Multi-Format Single- and Dual-Channel Satellite Receivers Sep 7, 2007
The BCM4506 integrates dual CMOS tuners and dual advanced modulation decoders that support DVB-S2 broadcast, DVB-S, QPSK and 8PSK applications and is ideal for multi-tuner advanced modulation satellite receiver systems ... Also featured within each of the BCM4505 and BCM4506 solutions are four 8- bit analog to digital converters, all digital variable rate QPSK/8PSK receivers, an advanced modulation LDPC/BCH (low density parity check / Bose- Chaudhuri-Hocquenghem) and a DVB-S-compliant forward... (PR Newswire)
