Question:

What is the approach for link budget calculation in DAS?

Answer:

One of the important design parameter is the power output setting at the remote DAS node. We use a link budget to determine the required power.

Traditional link budgets are created to calculate the maximum allowable path loss (MAPL). This helps to determine the number of cell sites and BTS/eNodeBs that will be required to provide coverage to a given area. When calculating the link budget for DAS, the process is reversed. Most of the communication in DAS is line of sight communication. Multipath has a relatively low impact in DAS scenario as compared to macro situations.

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