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待解决问题
You are referring to spatial multiplexing.
In this case, you need multiple antennas at both sides to increase spectral efficiency by transmitting multiple streams of data using the same spectrum.
Let y=Hx+n, and channel H can be perfectly detected, then you can get x by inv(H)y, corrupted by noise inv(H)n, which determines if x can be correctly detected or not.
More complicated receivers can enhance SNR and hence improve error rate.
In this case, you need multiple antennas at both sides to increase spectral efficiency by transmitting multiple streams of data using the same spectrum.
Let y=Hx+n, and channel H can be perfectly detected, then you can get x by inv(H)y, corrupted by noise inv(H)n, which determines if x can be correctly detected or not.
More complicated receivers can enhance SNR and hence improve error rate.
回答时间：2013-4-26 15:54
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