Next Generation Network Services: Technologies and Strategies
Next Generation Network Services: Technologies and Strategies
FGCN '08 Proceedings of the 2008 Second International Conference on Future Generation Communication and Networking - Volume 02
Delay-limited transmission in OFDM systems: performance bounds and impact of system parameters
IEEE Transactions on Wireless Communications
Orthogonal Frequency Division Multiple Acces System Analysis Using Bit Error Rate
NGMAST '09 Proceedings of the 2009 Third International Conference on Next Generation Mobile Applications, Services and Technologies
Transmit Optimization for MIMO-OFDM With Delay-Constrained and No-Delay-Constrained Traffic
IEEE Transactions on Signal Processing
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The migration to 4G networks will bring a new level of expectation to wireless communications. As after digital wireless revolution made mobile phones available for everyone, the higher speeds and packet delivery of 4G networks will make high quality multimedia available everywhere. The key to achieving this higher level of service delivery is a new air interface, OFDM, which is in turn enabled by the high level of performance. OFDM provides a robust signal that requires relatively little power yet uses bandwidth very efficiently. Carriers will benefit from greater flexibility by using OFDM, since in the same spectrum they will be able to offer more channels, including higher-bandwidth channels, with more types of services. Currently these systems are still being defined and prototyped. Achieving higher data rates requires OFDM systems to make more efficient use of the bandwidth than CDMA systems. One method of achieving this higher efficiency is through the use of higher order modulation. In this paper we have compared two digital modulation techniques QPSK and DQPSK used for digital transmission of data. Our main objective to develop this configuration is to compare the performance of each modulation techniques. Comparison is done by Bit Error Rate analysis of both modulation techniques. We have developed existing configurations and improved them with high quality senders and receivers using MATLAB technology.