Dynamic Allocation of Threshold using Fuzzy Logic in Switched diversity Technique

Diversity combining techniques [1] are very effective in counteracting fading effects in wireless environment, and have been extensively studied in recent years. However, most of developed diversity combining schemes are not suitable for mobile units because of either a complicated analog circuitry required, such as with maximal-ratio combining, or a poor performance, such as with switched combining. This paper, proposes an improvement in threshold for switched combining scheme by dynamic allocation of threshold using fuzzy control. The fuzzy control is used to determine the threshold levels of the switched diversity combining for change in signal levels due to fading in order to enhance the signal detection.