SMRTANT — The description in section 6.6.2 is not clear.

Original Text:
6.6.2 Space-Time Equalization
The preceding two techniques usually assume that the signal of interest is a narrowband signal compared to the coherence bandwidth of the channel and is thus subjected to flat fading across the bandwidth of the signal. Multipath fading in wireless communication can also introduce frequency distortion to the received signal. By introducing temporal processing in each antenna element to remove the effect of frequency distortion and doing a spatial combining described above results in mitigating channel induced frequency selective fading and providing antenna gain. Such schemes are called space-time adaptive processing (STAP) or equalization.

6.6.3 Diversity Combining
A major limiting factor in wireless communication is multipath fading where the amplitude of the received signal fluctuates over time. The occurrence of a deep fade where the signal amplitude becomes very small can impair the communications link for a conventional or a single antenna system. When multiple antennas are used it becomes less likely that two or more antennas undergo deep fades at the same time. This diversity in the received signal, for the same transmitted information, is exploited by smart antenna processing schemes. Many simple algorithms, such as maximal ratio combining, equal gain combining, and selection diversity have been developed to take advantage of using antenna arrays to exploit diversity reception in wireless systems. These algorithms weight the received signal similar to beamforming but based on a different criterion used in the algorithm

Revised Text:
6.6.2 Diversity Combining
A major limiting factor in wireless communication is multipath fading where the amplitude of the received signal fluctuates over time. The occurrence of a deep fade where the signal amplitude becomes very small can impair the communications link for a conventional or a single antenna system. When multiple antennas are used it becomes less likely that two or more antennas undergo deep fades at the same time. This diversity in the received signal, for the same transmitted information, is exploited by smart antenna processing schemes. Many simple algorithms, such as maximal ratio combining, equal gain combining, and selection diversity have been developed to take advantage of using antenna arrays to exploit diversity reception in wireless systems. These algorithms weight the received signal similar to beamforming but based on a different criterion used in the algorithm

6.6.3 Space-Time Equalization
The preceding two techniques usually assume that the signal of interest is a narrowband signal compared to the coherence bandwidth of the channel and is thus subjected to a flat fading across the bandwidth of the signal. Multipath fading in wireless communication can also introduce a frequency distortion to the received signal. By means of a temporal processing for each antenna element and a spatial combining of the temporally processed received signals, a frequency-selective fading introduced by the frequency distortion described above can significantly be mitigated.

We have corrected the description in Section 6.6.2.