Release date：2021-12-28Author source：KinghelmViews：387
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Then, let's talk about LTE dual polarizationantennaPerformance comparison between and single polarization antenna
LTE defines seven multi antenna transmission modes, including transmission diversity, precoding based MIMO, beamforming, etc. The seven transmission modes defined by LTE mainly consider that the transmission modes can be flexibly selected under different scenarios and different channel models. Generally, the bottlenecks and short boards of wireless mobile communication network performance are divided into the following three categories:
1、 Power limited system:
Typical application scenario: the main purpose is to increase coverage and overcome fading, such as effective area, wide rural coverage, etc
Type of antenna technology used: transmit diversity, receive diversity
Performance gap: 10 λ The performance improvement of single polarization antenna is less than 5% than that of dual polarization antenna, and there is little difference between the two.
2、 Interference limited system:
Typical application scenario: it is mainly used in dense urban areas with small station spacing. Interference is the main factor affecting network performance.
Type of antenna technology adopted: rank = 2mimo dual stream, rank = 1mimo single stream, rank adaptive
Performance gap: rank adaptive algorithm is obviously better than MIMO forced dual stream; At the same time, the performance of dual polarization antenna is 10 λ The performance of single polarization antenna is basically the same.
3、 Bandwidth constrained system:
Typical application scenario: the channel condition (CQI) is relatively good, there is no continuous coverage between base stations, the station spacing of base stations is relatively large, and the number of users is relatively rare. For example, single cell coverage in the initial stage of the experimental network,
Adopted antenna technology type: rank = 2mimo dual stream
Performance comparison: 10 λ The performance of single polarization antenna is better than that of dual polarization antenna, and the performance is improved by about 20%
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