TechRepublic

Analysis on QPSK Modulation Technique for Wideband Code Division Multiple Access

This paper is the study of the QPSK (Quadrature Phase Shift keying) modulation technique using AWGN (Additive White Gaussian Noise) and Multipath Rayleigh fading channel. In QPSK scheme the authors ...
EDN

Complex modulation comes to optical fiber

The demand for greater data throughput seems endless, and it is accelerating faster than many people expected, creating bottlenecks in fiber-optics networks. Digital transmissions of 100 Gbps, which ...
Electronic Design

Novel Low-Cost QPSK Modulator Needs No Adjustments

Eliminating software adjustments in circuits based on digital logic improves robustness and reduces cost for small-production-run series. This circuit is a cost-improved version of classical QPSK ...
TechRepublic

Performance of Free Space Optical Communication System With BPSK and QPSK Modulation

Free Space Optics is the technology which implies the line-of-sight link for the transfer of data between two distant points. The beam of light is used to provide optical connection that can transmit ...
Electronic Design

QPSK Demodulator Is A Good Match For Low-Cost Modulator

This demodulator is suitable for the quadrature phase-shift keying (QPSK) modulator previously published by the same author, "Novel Low-Cost QPSK Modulator Needs No Adjustments" (electronic design, ...
EDN

Wireless data rates, part 2: High-order and multi-carrier modulation

This series is excerpted from “3G Evolution, HSPA and LTE for Mobile Broadband, 2e.” Order this book today and receive an additional 20% discount. www.elsevierdirect.com and make sure to type in 92839 ...