The results show DVCN can reduce users' transmit power, decrease multi-user interference and improve the reverse link capacity.

理论分析证明，虚拟小区可以降低用户发射功率，从而减少多用户干扰，提高系统容量。

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So the scheme employing PPM is preferred and we further find when MUI(Multi User Interference) is considered the performance degrades when the number of users increases.

进一步考虑在存在多用户干扰条件下，该系统性能随用户数的增加而下降。

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So the scheme employing PPM is preferred and we further find when MUI(Multi User Interference) is considered the performance degrades when the number of users increases.

进一步考虑在存在多用户干扰条件下，该系统性能随用户数的增加而下降。

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