Novel Switching Schemes for Dual S+N Selection Diversity Combining

The performance in fading of two dual signal-plus-noise (S+N) selection combining (SC) diversity structures employing different filtering is examined. The proposed structure includes either a minimum mean square error filter or a lowpass filter designed to reduce the noise in the signal used for determining the antenna switching times. The switching rate and the bit error rate of the proposed structures are compared to a receiver in which no filtering is used for switching rate reduction.