请教几个网规网优单词的翻译，多谢！！！

思念野风筝

1.A clear cell dominance area optimisation was performed for interference reduction/elimination. Each cell must have a clear dominance instead of a scattered one as seen in the 2G measurement data.

  cell dominance area怎么翻译？  小区最优服务区域？还是小区主导覆盖区域？ 还是其他？？？

2.Defective Areas  导频污染区域？

3.channel module cards 怎么翻译？

4.In quality evaluation by degradation rate, UEs are generated in the grid for quality evaluation, and then desired SIR is verified. The process is repeated for the number of times epecified, and then the rate for unsatisfatory cases is calculated to determine the degradation rate of the grid.

  degradation rate怎么翻译？？？ 好像是QoS的一个指标。