An LMS adaptive array for multipath fading reduction
Abstract
The application of a least-mean-square (LMS) adaptive array to the problem of multipath fading reduction is discussed. However, it is known that multipath components are in general correlated with one another. The effect of the correlation on the performance of the LMS adaptive array is examined. When the correlation coefficient does not equal or approximate 1, the LMS adaptive array suppresses the multipath signals significantly by nulling. On the other hand, when the correlation coefficient nearly equals 1, the LMS adaptive array prevents the output signal power from decreasing. Therefore, the LMS adaptive array may reduce the multipath fading effectively for any correlation coefficient value. A reference signal in the LMS adaptive array is also discussed. It is shown that synchronization in the reference signal generation must be extremely accurate. Moreover, a processor configuration is proposed which may generate the reference signal with the required accuracy.
- Publication:
-
IEEE Transactions on Aerospace Electronic Systems
- Pub Date:
- January 1987
- DOI:
- 10.1109/TAES.1987.313354
- Bibcode:
- 1987ITAES..23...17O
- Keywords:
-
- Adaptive Control;
- Radio Communication;
- Signal Fading;
- Numerical Analysis;
- Signal Generators;
- Signal Processing;
- Thermal Noise;
- Communications and Radar