TDD and FDD 比较

TDD, downlink and uplink traffic use the same channel and separated by time space

  • 适合unsymmetrical业务,如因特网数据业务
  • lower speed support, e.g. up to 120Km/h, 因为TDD芯片处理速度跟不上
  • TDD基站成本比FDD低,重要原因之一,TDD中,上下行数据共用同一频率,更适合智能天线,loss减少,效率增加


FDD, downlink and uplink traffic use separate channels

  • 适合symmetrical业务,但对于unsymmetrical业务,频谱利用率大大降低
  • higher speed support, e.g. up to 500Km/h
  • 抗干扰性能优于TDD


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