GSM网络规划和优化考试试题及答案.doc

GSM网络规划和优化考试试题200506Test Questions on GSM Network Planning and Optimization 200506 姓名Name: _________________ 分数Mark: __________________ 选择题（每题2分，供40分） Single or Multiple Choices (2 Points for Each Question. Total Points: 40) 1. 一般认为，设计蜂窝系统时，使用Erlang B呼损公式，为了便于工程计算，制成了Erlang B表。Erlang B表直接给出了下列 选项的相互关系：Generally, the Erlang B call loss formula can be used in design of a cellular system. An Erlang B table is created for ease of engineering calculation. The Erlang B table shows the relationship between the following options: （c） A. 载频数、话音信道数和可提供的话务量Number of carrier frequencies, number of voice channels and available traffic B. 人均话务量、话音信道数和可提供的话务量Traffic per person, number of voice channels and available traffic C. 呼损率、话音信道数和可提供的话务量Call loss rate, number of voice channels and available traffic D. 呼损率、载频数和可提供的话务量；Call loss rate, number of carrier frequencies and available traffic 2. 在下列地物中，那个地物的电波传播损耗最大（D） Which of the following surface features causes the largest electric wave propagation loss ( ) A. 水面Water surface B. 沙漠Desert C. 草地Grassland D. 森林Forest 3. 抗干扰的技术有（abc）The anti-interference technologies include ( ). A. 跳频技术Frequency hopping technology B. 动态功率控制Dynamic Power Control C. 不连续发射技术Discontinuous transmission technology D. 分集技术Diversity technology 4. 传播模型的选择与覆盖区域的半径有关，一般认为，当覆盖半径大于___ __时，统计型模型的预测精度比较理想。 (c )Selection of propagation model is related to the coverage radius. Generally, the statistics model has a more desirable prediction accuracy when the coverage radius is larger than ___. A. 100m B. 500m C. 1km D. 35km 5. 基带跳频一般建议采用（b） 复用方式，射频跳频一般建议采用（a）复用方式  multiplex mode is recommended for baseband frequency hopping, while for radio frequency hopping. A. 1X3 B. 3X3 C. 4X3 D. 随意复用Any multiplexing 6. 信令仪可以在如下接口采集信号 ?The signaling instrument can collect signals at the BC interfaces. A. Um B. A C. Abis D. 手机和SIMS的接口Interface between the mobile phone and SIMS 7. DT路测设备主要是对何种信号进行测量？bWhich type of sign