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Overview: Orthogonal Frequency Division Multiplexing (OFDM) is widely recognized as an efficient modulation method for wireless communication. In OFDM, a stream of signals are modulated on many equally spaced parallel subcarriers. Demodulation and modulation are efficiently implemented by means of a Fast Fourier Transform (FFT) and its inverse, respectively. In transmissions over a radio channel, the orthogonality of the signals is maintained only if the channel is flat and time-invariant. However, in a dispersive channel, self-interference occurs among successive symbols at the same subcarrier [InterSymbol Interference (ISI)], as well as among signals at different subcarriers [InterCarrier Interference (ICI)].
Unified Services Of AAA In 4G LTE Networks
The present technical white paper outlines the role of AAA services for 3GPP and non-3GPP system access in LTE technology. This paper...
Mobile Device Management for Dummies
With the increase in the use of mobile devices, you likely have questions that are left unanswered when it comes to managing and securing those devices. Well...
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