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This paper proposes a scheme of continuous phase modulation (CPM) receivers using frequency domain equalization and conventional parallel and serial CPM receiver structures. Frequency domain equalizers for CPM block transmissions provide spectral and power efficient wireless communications with less complexity than conventional time-domain processing receivers over frequency selective fading channels...
Herein proposed is a new frequency domain equalizer (FEQ) to suppress channel induced interference such as ICI and ISI, co-channel interference, and overlaid systems interference. Unlike earlier schemes, this proposed algorithm requires no temporal oversampling nor the use of more than one receive antenna. All the above is achieved by exploiting null subcarriers (a.k.a. virtual/unused/unmodulated...
This paper presents an equalization of SC-FDMA systems without any reference symbols by using a FD-DFE. The Aim is to avoid the loss of spectral efficiency and throughput due to the reference symbols encountered in the existing SC-FDMA systems. Unfortunately, this equalizer shows adapting problems to the SC-FDMA context concerning conversion of circular to linear convolution that we'll try to overcome...
An iterative optimization method of transmit/receive frequency domain equalization (FDE) is proposed for single carrier transmission systems, where both transmit and receive FDE weights are iteratively determined with a recursive algorithm so as to minimize the error signal at a virtual receiver. The computer simulation results show that SC systems using the proposed transmit/receive equalization...
The conventional over-lapping-add equalizer for ZP-OFDM based broadcasting systems fails to eliminate the ISI and ICI introduced by multipath propagation when the channel impulse response (CIR) length exceeds the duration of guard interval (GI). We propose, in this paper, a new equalization scheme for the suppression of insufficient GI generated interference using inherent diversity property of ZP-OFDM...
In this paper, we propose a maximum-likelihood sequence estimation (MLSE) procedure for transmission over rapidly time-varying channels. The time-varying channel is approximated using the basis expansion model (BEM). Using the BEM allows for an efficient implementation of the Viterbi algorithm (VA). This stems from the fact that with the BEM the time-varying channel is approximated over a window of...
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