LTE小区搜索软件加入对HACKRF的支持,有望将来解调LTE SIB信息(Add hackrf support to LTE Cell Scanner)

| Categories lte  | Tags LTE  TD-LTE  SDR  4G  Beijing  Cell-Search  Cell-Scanner  HACKRF 

(原文刊于被sina关闭的我的sina博客)

感谢 http://hackrf.net/ 借给我HACKRF板供调试!

OpenCL加速的 TDD/FDD LTE小区搜索与跟踪源代码:https://github.com/JiaoXianjun/LTE-Cell-Scanner

因为HACKRF带宽可达20MHz,远高于rtl-sdr电视棒,因此有了HACKRF,将来就可能加入解码LTE SIB信息的功能(程序原来主要针对rtl-sdr电视棒设计,受限于rtl-sdr电视棒带宽,只能解码LTE MIB)

(发现SDR棒子现在有点像树莓派一样热闹,这里有一个覆盖HF的FPGA直采棒子: http://sdrstick.com/ )

视频演示:

(国内) http://v.youku.com/v_show/id_XNjk3Mjc1MTUy.html

(国外) http://www.youtube.com/watch?v=3hnlrYtjI-4

———-更新————

这里给出如何用C/C++直接编程调用hackrf: 使用C和C++直接调用HACKRF来支持LTE小区搜索(LTE Cell Scanner by HACKRF(C, C++))

小区扫描结果:

新增 2360MHz频点,亦庄:

  Detected a TDD cell! At freqeuncy 2360MHz, try 0
    cell ID: 30
     PSS ID: 0
    RX power level: -8.25803 dB
    residual frequency offset: 33678.1 Hz
                     k_factor: 0.999984
Detected the following cells:
DPX:TDD/FDD; A: #antenna ports C: CP type ; P: PHICH duration ; PR: PHICH resource type
DPX CID A      fc   freq-offset RXPWR C nRB P  PR CrystalCorrectionFactor
TDD  30 1   2360M         33.7k -8.26 N 100 N one 1.000014270593028165

在家碰到一次3 hits!

Hit        PAR [12.2682]dB
PSS XCORR  cost 9.21082s
  Detected a FDD cell! At freqeuncy 1860MHz, try 0
    cell ID: 86
     PSS ID: 2
    RX power level: -16.1312 dB
    residual frequency offset: 24503.3 Hz
                     k_factor: 0.999986
  Detected a FDD cell! At freqeuncy 1860MHz, try 0
    cell ID: 142
     PSS ID: 1
    RX power level: -17.1019 dB
    residual frequency offset: 24494.4 Hz
                     k_factor: 0.999986
  Detected a FDD cell! At freqeuncy 1860MHz, try 0
    cell ID: 48
     PSS ID: 0
    RX power level: -19.5743 dB
    residual frequency offset: 24515.2 Hz
                     k_factor: 0.999986
Detected the following cells:
DPX:TDD/FDD; A: #antenna ports C: CP type ; P: PHICH duration ; PR: PHICH resource type
DPX CID A      fc   freq-offset RXPWR C nRB P  PR CrystalCorrectionFactor
FDD  86 2   1860M         24.5k -16.1 N 100 N one 1.0000131739724291702
FDD 142 2   1860M         24.5k -17.1 N 100 N one 1.0000131692083715773
FDD  48 2   1860M         24.5k -19.6 N 100 N one 1.0000131804116960677

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