error keying
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A Novel Coding Technique to Minimise the Transmission Bandwidth and Bit Error Rate in DPSK
White Paper This paper proposes a novel coding technique that aims to reduce the Transmission Bandwidth (BT) and Bit Error Rate (BER) vis-a-vis Conventional Differential Phase Shift Keying (CDPSK) in digital band... [08 Jul 2008]
Environment Agency Becomes More Efficient by Integrating Financial and HR Systems
White Paper Many processes were manual, time-consuming and error-prone due to data re-keying. The Environment Agency's role is to protect the environment in England and Wales and ensure that air, land, and water... [01 Jul 2008]
Error Probability Minimizing Pilots for OFDM With M-PSK Modulation Over Rayleigh-Fading Channels
White Paper This paper analyzes the symbol error rate (SER) performance of OFDM with M-ary Phase-Shift Keying (M-PSK) modulation over Rayleigh-fading channels, in the presence of channel estimation errors. Both... [10 Apr 2008]
Performance of MT-CDMA System With Post-Detection Diversity Reception Over Rician Fading Channel
White Paper The system uses differential binary phase shift keying (DBPSK) modulation and post detection diversity combining, considering slowly Rician fading and frequency selective channel in the indoor environment. [10 Apr 2008]
A RAKE Receiver With ICI/ISI Equalizer for CCK Wireless LAN Modem
White Paper This paper proposes a new type of RAKE receiver for complementary code keying (CCK) codes, which is suitable for the multipath environment with large delay spread. Also the proposed receiver uses the... [06 Dec 2007]
Understanding Upstream Modulation Profiles
White Paper Many upstream modulation profile variables can be changed, such as guard time of the burst, preamble, modulation (quadrature phase shift keying [QPSK] or 16-quadrature amplitude modulation [QAM]), and forward... [28 Nov 2007]
A Scalable Multicast Key Management Scheme for Heterogeneous Wireless Networks
White Paper However, these tree-based key management schemes do not exploit issues related to the delivery of keying information that provide opportunities to further reduce the communication burden of rekeying. In wireless... [01 Aug 2007]
Service Company Eliminates the Need for 70 Paper Manuals by Providing Field Technicians With Handheld Devices
White Paper But they had to carry numerous paper manuals to identify parts, and keying in complex codes was error-prone. Technicians at ware-washing manufacturer Winterhalter spend most of their day in the field... [16 Apr 2007]
The Effectiveness of Signal Clipping for PAPR and Total Degradation Reduction in OFDM Systems
White Paper This paper analyzes clipped M-ary differentially encoded phase-shift keying (M-DPSK) OFDM. An effective PAPR reduction scheme should provide one of the two equivalent Enhancements; a reduced error floor... [11 Apr 2007]
Performance Degradation of OFDM Systems Due to Doppler Spreading
White Paper For conventional modulation methods such as Phase-Shift Keying (PSK) and Quadrature-Amplitude Modulation (QAM), the bivariate probability density function (pdf) of the ICI is shown to be a weighted Gaussian mixture. [11 Apr 2007]
Preemptive DATA CLEANING: Techniques
White Paper Other techniques include proper form design, data monitoring, double keying, and hash totals. This paper examines these error-prevention techniques through examples and where applicable, it includes SAS... [15 Dec 2006]
Spectral Efficiency of Coded Phase-Shift Keying for Fiber-Optic Communication
White Paper The bandwidth savings of differential quadrature phase-shift keying (D-QPSK) over both direct-detection on-off keying and differential binary phase-shift keying suggest that D-QPSK can... [07 Apr 2005]
Performance of an Improved Modified MMSE Receiver for CDMA Systems in Rayleigh Fading
White Paper An asynchronous binary phase shift keying (BPSK) direct sequence code division multiple access (DS/ CDMA) system is assumed, with pilot symbols inserted into the data stream, for channel estimation. In this paper, the... [24 Jul 2004]
Mono-Phase and Bi-Phase Ultra-Wideband
White Paper In its formative years, some of the most popular methods to create UWB pulse streams used monophase techniques such as pulse amplitude (PAM), pulse position (PPM), or on-off keying (OOK). The marketplace drives these... [25 Feb 2004]
