Signal processing of satellite navigation systems with quadrature multiplexing and frequency division

Quadrature Amplitude Modulated Codes for Orthogonal Frequency Division Multiplexing Applications

The development of next generation of high-speed mobile communication systems requires cost-effective transmission techniques. Orthogonal Frequency Division Multiplexing (OFDM) is a transmission scheme that has gathered much attention lately for its high performance at comparably low complexity. It has already been adapted in the European radio(DAB)and TV(DVB-T)standards, and IEEE 802.11a. Desp...

Quadrature Amplitude Modulation All Optical Orthogonal Frequency Division Multiplexing-dense Wavelength Division Multiplexing-optical Wireless Communication System under Different Weather Conditions

This paper proposes an analytical model for evaluating the performance of dense wavelength division multiplexing (DWDM) for all optical orthogonal frequency division multiplexing (AO-OFDM) optical wireless channel. The investigated performance for proposed system is evaluated for the parameters  bit error rate (BER) and Q factor .The constellation diagrams, and bit error rate (BER) of the recei...

Orthogonal Frequency Division Multiplexing Timing Synchronization in Multi-Band Orthogonal Frequency Division Multiplexing Ultra-Wideband Systems

Problem statement: MB-OFDM UWB systems have attractive features and received a great attention. It has the capability of sending/receiving data at rates in access of 100 Mbits sec. Owing to the sensitivity of OFDM systems to synchronization errors, a fast synchronization algorithm is required to discern for the start of OFDM symbol. Existing approaches to OFDM time synchronization rely on their...

Nonlinear Frequency-Division Multiplexing

Two signal multiplexing strategies for multi-user optical fiber communication are considered: Wavelength-division multiplexing (WDM) and nonlinear frequency-division multiplexing (NFDM), based on the nonlinear Fourier transform (NFT). The inverse NFT is implemented using an approach that is dual of the forward NFT and does not require solving integral equations. In contrast to prior work where ...

Orthogonal Frequency Division Multiplexing with Diversity for Future Wireless Systems