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Forum Discussion
M1 antenna setup
Hello all, Just ordered 2 Wilson 10dbi yagi's and cables and patch cords, etc. My question is how do you have yours mounted? Stacked, side by side, or + 45 -45 In in a rural area in east T.N. and ...
MIMO is for environments where signal is bouncing around. Like downtown city with lots of buildings.
MIMO does not help for more rural areas with little or no signal bouncing around.
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I don't fully agree with this. Mimo is a key feature in LTE and it works anywhere, even on rural areas, at least on my area. Depending on active LTE transmission mode it's utilised in different ways. To archieve high data speeds, TM3 or TM4 are needed since those are using spatial multiplexing. I don't know if LTE in US is so much different than on Europe, but basically disabling one datastream reduces the data speed by half. 20MHz BW with 64QAM = 2*75=150Mbps. If the BTS supports 2x2 MIMO, there is no any practical idea to reduce the performace by using only one antenna at the UE side. Also, on poor signal areas, MIMO improves the signal quality when TM2 (transmission diversity) is being used. The same datastream is sent via two different radio paths and with some algoritms, overall performance is improved over 1x1 situation.
4x4 MIMO is a bit different story. To get four concurrent datastreams to work, you need to trigger at least Rank 3. It'snot triggered If you stand in the eNB main beam. 4x4 needs more signal propagation than 2x2.
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I'm planning to some tests with my MR-1100 EUS but the issue is to find high quality ts9-sma pigtails.
Edit:. And it really doesn't matter on how much propagation is around, since eNB antennas are cross-polarised in a shape of letter X , those signal are anyways using different paths.
MIMO does not help for more rural areas with little or no signal bouncing around.
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I don't fully agree with this. Mimo is a key feature in LTE and it works anywhere, even on rural areas, at least on my area. Depending on active LTE transmission mode it's utilised in different ways. To archieve high data speeds, TM3 or TM4 are needed since those are using spatial multiplexing. I don't know if LTE in US is so much different than on Europe, but basically disabling one datastream reduces the data speed by half. 20MHz BW with 64QAM = 2*75=150Mbps. If the BTS supports 2x2 MIMO, there is no any practical idea to reduce the performace by using only one antenna at the UE side. Also, on poor signal areas, MIMO improves the signal quality when TM2 (transmission diversity) is being used. The same datastream is sent via two different radio paths and with some algoritms, overall performance is improved over 1x1 situation.
4x4 MIMO is a bit different story. To get four concurrent datastreams to work, you need to trigger at least Rank 3. It'snot triggered If you stand in the eNB main beam. 4x4 needs more signal propagation than 2x2.
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I'm planning to some tests with my MR-1100 EUS but the issue is to find high quality ts9-sma pigtails.
Edit:. And it really doesn't matter on how much propagation is around, since eNB antennas are cross-polarised in a shape of letter X , those signal are anyways using different paths.
Here's the thread I was talking about where someone removed the nighthawk from the case. I see it was just commented on and bumped it to the top of the forum.