Title :
A technique for improving the convergence probability of blind equalization
Author :
Yu, Meng-Lin ; Larsson, Patrick
Author_Institution :
Lucent Technol., Bell Labs., Holmdel, NJ, USA
Abstract :
We present a method that can solve three common cases of misconvergence in blind two-dimensional, 2D, equalizers. The technique is based on measuring a few statistical `goodness´ parameters that describe properties of the constellation at the output of the equalizer. After misconvergence is detected, the tap weights in either the I or Q part of the equalizer are shifted an appropriate number of positions. The positional shift of tap weights moves the equalizer state close to the correct solution and entails a rapid and reliable convergence
Keywords :
adaptive equalisers; amplitude modulation; convergence of numerical methods; phase modulation; probability; I channel; Q channel; adaptive equaliser; blind 2D equalizers; blind equalization; blind fractionally spaced equalizers; carrierless amplitude-phase modulation; constellation; convergence probability; equalizer state; misconvergence; positional shift; rapid convergence; reliable convergence; statistical goodness parameters; tap weights; Adaptive filters; Amplitude modulation; Blind equalizers; Convergence; Decoding; Finite impulse response filter; Matched filters; Pulse shaping methods; Quadrature amplitude modulation; Transmitters;
Conference_Titel :
Information, Communications and Signal Processing, 1997. ICICS., Proceedings of 1997 International Conference on
Print_ISBN :
0-7803-3676-3
DOI :
10.1109/ICICS.1997.647113
