Adaptive filter theory (2nd ed.)
Adaptive filter theory (2nd ed.)
Simulation of communication systems
Simulation of communication systems
Nonlinear equalization of multipath fading channels with noncoherent demodulation
IEEE Journal on Selected Areas in Communications
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Schemes which combine differential detection and blind equalization, to eliminate the need for phase recovery and training sequence, are studied. Decision feedback is also added in an attempt to equalize null and fading channels. Using Godard and Modified Constant Modulus Algorithms (MCMA) new systems are proposed by combining coherent and noncoherent detection with these two algorithms. For MCMA, as it can track the carrier, neither differential detection nor a PLL is required. Contrarily, Godard Algorithm needs either differential detection or a PLL to correct phase error. While the proposed system combining differential detection, blind equalization and decision feedback can indeed, in principle, equalize different channels, the robustness of the system is compromised.