QWhich of the following is not a category of space diversity technique?

Space diversity is a technique used in wireless communication systems to combat the effects of fading caused by multipath propagation. This technique involves using multiple receiving antennas to improve the quality and reliability of the received signal. Space diversity reception methods can be classified into four categories: selection diversity, feedback diversity, maximal ratio combining, and equal gain diversity. Selection diversity involves selecting the antenna with the best quality signal and using that signal for further processing. Feedback diversity involves using the feedback signal to adaptively adjust the weightings of the multiple received signals. Maximal ratio combining combines all the received signals in a way that maximizes the received signal-to-noise ratio. Equal gain diversity involves combining all the received signals with equal weightings. Time diversity, on the other hand, is not a category of space diversity technique. Time diversity is a technique used to combat the effects of fading caused by delay spread. This technique involves transmitting the same data multiple times, but with different delays. By doing so, the probability of all transmitted signals being affected by fading at the same time is reduced. In conclusion, space diversity reception methods can be classified into four categories: selection diversity, feedback diversity, maximal ratio combining, and equal gain diversity. Time diversity is a separate technique used to combat the effects of delay spread.