Which coverage is higher 2T2R or 4T4R?

Design and Planning
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If the rru is 40Watter so on 2x2 mimo total power for to tx branches is 20W but on 4x4 mimo 10W per port meaning the power total is 40W…I think there is a bit of coverage increase due to power total. 2port tx vs 4 port tx…

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  • 2T2R: This configuration includes two transmit antennas and two receive antennas. .

  • 3T3R or 4T4R: These configurations have three or four transmit antennas and three or four receive antennas, respectively.

Comparison of 2T2R or 4T4R

  • Coverage Comparison

    • Power Distribution: In a 2T2R configuration, the total power output is concentrated across two transmission paths. For instance, if a remote radio unit (RRU) has a total power of 40W, each transmitter can utilize 20W, leading to stronger signals and better coverage in a given area.

    • Conversely, in a 4T4R configuration, the same total power is distributed across four transmitters, resulting in only 10W per transmitter. This reduced power per branch can lead to weaker signals, particularly at the edges of the coverage area, thus potentially decreasing overall coverage.

  • Enhanced Signal Strength and Coverage:

    4T4R configurations utilize four antennas for both transmitting and receiving signals, compared to just two in 2T2R setups. This increase in the number of antennas allows for better signal propagation and reception, leading to enhanced coverage, especially in larger or more complex environments.

  • Practical Observations:

    • Field tests have shown that while 4T4R configurations can enhance throughput and user experience due to better signal handling, they often result in increased coverage holes compared to 2T2R setups. This is particularly noticeable in environments with challenging propagation conditions.

  • Improved Data Rates:

    • With more antennas, 4T4R systems can handle more data streams simultaneously. This results in higher data rates and faster speeds, which are crucial for applications requiring high bandwidth, such as video streaming, online gaming, and large file transfers

  • Better Reliability and Performance:

    • The additional antennas in 4T4R configurations contribute to more robust and reliable connections. This is particularly beneficial in environments with high traffic or interference, where maintaining a stable connection is essential.

  • Diversity Gain

    • Although 4T4R configurations benefit from increased diversity gain (which can improve signal quality and reduce interference), this advantage does not fully compensate for the loss of coverage due to the lower power per transmitter.

    • The diversity gain primarily enhances throughput and reliability rather than extending coverage area.
      The diversity gain in 4T4R can improve performance in terms of user experience and capacity, but it may not offset the coverage reduction caused by lower power levels per antenna element.

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