The Erlang capacity per cell and per unit area in a CDMA urban microcellular environment are evaluated. Two different cell plans are considered where the communication between the base station and the mobile unit always occurs in line-of-sight condition: the full and the half square cell plans. We obtain analytical expressions for the Erlang capacity for both hard and soft handoff. We found that the Erlang capacity at 900 MHz is higher than the Erlang capacity at 1800 MHz. On the other hand, we show that the capacity increase due to the base station doubling or cell radius reduction depends on the antenna heights, the frequency of operation, and the distance between streets, and it ranges from 64 to 100%.
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