Wireless Personal Communications: An International Journal
Blind source separation with CMA+AMA equalizer over correlated MIMO channels
MILCOM'09 Proceedings of the 28th IEEE conference on Military communications
Semi-blind adaptive beamforming for high-throughput quadrature amplitude modulation systems
International Journal of Automation and Computing
| Hi-index | 35.68 |
The constant modulus (CM) array is a blind adaptive beamformer capable of recovering a narrowband signal among several cochannel sources without using a pilot or training signal. It is a conventional weight-and-sum adaptive beamformer whose weights are updated by the constant modulus algorithm. An adaptive signal canceller follows the beamformer to remove the captured signal from the array input and to provide an estimate of its direction vector. Based on a Wiener model, we investigate the steady-state properties of the CM array and the signal canceller. For mutually uncorrelated sources and noise, it is shown that the signal canceller exactly removes the source captured by the array. Thus, identical stages of the CM array and signal canceller may be used in a multistage system to recover several cochannel sources. Computer simulations are presented to verify the analytical results and to illustrate the transient behavior of the system