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PN Canceller is a tool to effectively utilize frequency and resources of base station and central terminal. It improves link quality through wireless relay system located between wireless interface of base station and central terminal among wireless mobile communication environment with W-CDMA method.
The most significant trait is that it does not just amplify the signals transmitted from stations, but distinguishes PN code of each station and eliminates unwanted stations pilot signals, the core signals for distinction of station.

< Concept of PN Canceller >
PN Canceller - Outdoor Type
PN Canceller - Outdoor Type

Digital IF
  • Separation of I and Q channel from alanog radio signal received by antenna
  • Convertion to digital signal
Cell Searching
  • Slot Synchronization : P-SCH search
  • Frame Synchronization : S-SCH search
  • CPICH searching : Pertinent station CPICH search
  • Tracking : Tracing received pilot time period
  • Channel Estimation : Estimation of received pilot benefit
CPICH PN ID Generation
  • Formation of virtual relative PN lists
  • Analysis on received pilot
CPICH PN Generation
  • Formation of base station PN
Pulse Shaping
  • Formation of base station pilot signal
  • Cancellation ratio and profit regulation
AFC
  • Regulation of the timing of AFC base station and relay tools
  • Betterment of receptor performance of relay area terminal
RF relay
  • Signal relay between Node-B of WCDMA network and UE

NO ITEM Specification
1 Frequency Range 2,150MHz ~ 2,170MHz
2 Maximum System Gain 70dB 2dB (40~70dB)
3 Frequency Stability 227Hz
4 Maximum Output Power +10dBm / total (+20% ~ -50%)
5 Maximum Input Power -35dBm/Total 2dB
6 Error Vector Magnitude Below 12.5 % (@ Maximum Power)
7 Peak Code Domain Error Below -35 dB (SF=256)
8 System Group Delay Within 8us
9 Maximum FA 4 FA
10 PN Eliminating Capacity Above 20dB
11 PN Elimination number (including multi-path) 4PN / 1FA
12 PN Selection Method Auto / Manual
13 PN Selection Standard RSCP standard