Acta Metallurgica Sinica(English letters) ›› 2013, Vol. 20 ›› Issue (5): 57-62.doi: 10.1016/S1005-8885(13)60090-4

• Wireless • 上一篇    下一篇

Superposition effect of passive inter-modulation for systems operating in multiple carriers

赵培1,张需溥2,杨大成1   

  1. 1. Wireless Theory & Technology Laboratory, Beijing University of Posts & Telecommunication, Beijing 100876, China 2. R&D center, Jointcom Communication Technology Co. Ltd, Hangzhou 310012, China
  • 收稿日期:2013-06-19 修回日期:2013-08-27 出版日期:2013-10-30 发布日期:2013-10-29
  • 通讯作者: 赵培 E-mail:indoor123@sina.com

Superposition effect of passive inter-modulation for systems operating in multiple carriers

  1. 1. Wireless Theory & Technology Laboratory, Beijing University of Posts & Telecommunication, Beijing 100876, China 2. R&D center, Jointcom Communication Technology Co. Ltd, Hangzhou 310012, China
  • Received:2013-06-19 Revised:2013-08-27 Online:2013-10-30 Published:2013-10-29
  • Contact: Pei Zhao E-mail:indoor123@sina.com

摘要: Nowadays, more carriers and components are used in cellular networks to satisfy the requirement of high-speed data service. The increase of carriers and components may result in serious problem of passive inter-modulation (PIM). This paper investigates the superposition effect of 3rd-order and 5th-order PIM under multicarrier scenarios with the channelized scheme (CS) and the multiplexed scheme (MS). We use the concept of ‘effective hit’ and the cumulative inter-modulation factors (CIFs) to evaluate the cumulative PIM product strength on each individual carrier within the receive signal band. Furthermore, with the simulator based on Monte-Carlo method, the group inter-modulation factor (GIF) is calculated to measure the average superposition effect for multiple carriers compared with the benchmark case. The simulation results show that, compared with the CS, the strength of PIM product with the MS does not increases so greatly with the growth of the total number of the carriers. The results are useful for the component designers and the cellular network planners.

关键词: PIM, superposition effect, multicarrier

Abstract: Nowadays, more carriers and components are used in cellular networks to satisfy the requirement of high-speed data service. The increase of carriers and components may result in serious problem of passive inter-modulation (PIM). This paper investigates the superposition effect of 3rd-order and 5th-order PIM under multicarrier scenarios with the channelized scheme (CS) and the multiplexed scheme (MS). We use the concept of ‘effective hit’ and the cumulative inter-modulation factors (CIFs) to evaluate the cumulative PIM product strength on each individual carrier within the receive signal band. Furthermore, with the simulator based on Monte-Carlo method, the group inter-modulation factor (GIF) is calculated to measure the average superposition effect for multiple carriers compared with the benchmark case. The simulation results show that, compared with the CS, the strength of PIM product with the MS does not increases so greatly with the growth of the total number of the carriers. The results are useful for the component designers and the cellular network planners.

Key words: PIM, superposition effect, multicarrier