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Continuous phase modulation (CPM) is an attractive scheme for wireless communications because of its constant envelope(CE) and its ability to improve the diversity of the multipath channel. In this paper we propose a new interleaving scheme for the CPM based orthogonal frequency-division multiplexing (CE-OFDM) system, namely chaotic interleaving. The proposed system combines the key characteristics...
Cyclic prefixed communication systems are generally called discrete multitone (DMT) for wireline systems, and orthogonal frequency-division multiplexing (OFDM) for wireless systems. A cyclic prefix should be as long as the channel impulse response (channel delay spread) to combat inter symbol interference (ISI). If this requirement is not met, a channel shortening equalizer is used to shorten the...
In wireless communications, multiple receive antennas can be used with orthogonal frequency division multiplexing (OFDM) or single-carrier (SC), and frequency domain equalization (FDE) or frequency domain pre-equalization (pre-FDE) to significantly improve system capacity and performance. However, the complexity of such combination can be very large because multiple discrete Fourier transform (DFT)...
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