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A simple method for joint blind equalization and detection of QAM and PAM transmissions is presented. By studying the geometrical relations between the rectangular QAM signal constellation and PAM signal constellation, a novel cost function including blind equalization and detection of them is defined. Such cost function-based the improved constant modulus algorithm (CMA) transforms the coordinates...
In digital communication system the Constant Modulus Algorithm (CMA) based FIR equalizer is by far the most popular blind equalization to combat the Inter-Symbol Interference (ISI). The major problem of CMA, however, is that it only achieves moderate convergence rate and steady state mean square error (MSE). Furthermore, the CMA and such blind equalization techniques must rely on the observations...
A new concurrent scheme for blind equalization suitable for 16-QAM signal is proposed. It combines modified modulus algorithm (MCMA) and modified decision directed (MDD) algorithm. By exploiting the inherent structural relationship between the 4-QAM signal's coordinates and 16-QAM signals' coordinates, another style of cost function for constant modulus algorithm (CMA) is defined, and we have proved...
A blind equalization and order detection algorithm suitable for QAM signal is proposed. By exploiting the inherent structural relationship between the 4-QAM signal's coordinates and other higher-order QAM signals' coordinates, a novel cost function including channel blind equalization and signal order detection is defined. In such method, by changing the coordinates of input signals, higher-order...
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