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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...
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...
In this paper we study the constant modulus algorithm based on variable segment error function (VS-CMA) deeply, and aiming at the problems of its segment position is not easy to be set and its step size must be fit for the segment position, a fast constant modulus algorithm based on exponential variable segment error function (EVS-CMA) is proposed. In the EVS-CMA, an exponential function is introduced...
Blind equalization is a technique for adaptive equalization of a communication channel without the aid of training sequences. This paper proposes a simple blind equalization algorithm suitable for 16-QAM signal. In this proposed algorithm, we study a new style of error function of constant modulus algorithm (CMA) aiming at the character of 16-QAM signals constellation. By adjusting the coordinates...
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