CRAWDAD cu/wimax

WiMax measurements made with a portable spectrum analyzer on the University of Colorado campus.This data was collected at the University of Colorado Boulder. It contains careful point measurements of the WiMax network serving the University of Colorado campus. Measurements were made with a portable spectrum analyzer and contain high fidelity measurements of CINR, RSS, EVM, RCE, Spectrum Flatness, and Frequency Shift. Several hundred measurements were taken on a 100m equalateral triangular lattice as a "first phase" sample. Additional "second phase" measurements were taken at random and optimized points.date/time of measurement start: 2011-05-01date/time of measurement end: 2011-05-01collection environment: This data was collected at the campus of University of Colorado, Boulder, USA. network configuration: All measurements were done "passively", without any greater access to the WiMax network than a typical client device would have. Five distinct Base stations (BSs) were measured operating in an educational license at 2.5 GHz: Name,Orientation,Frequency,BSID,Lng,Lat,Easting,Northing,AGL(m),Channel "Gamow_West",235,2530,"000000:000101",-105.267778,40.008056,2017383.55491878,4582293.92520922,46,116 "Gamow_East",90,2520,"000000:000102",-105.267778,40.008056,2017383.55491878,4582293.92520922,46,76 "Eng_East",120,2530,"000000:000002",-105.263056,40.007222,2017808.74220088,4582284.16821699,34,116 "Eng_West",240,2510,"000000:000001",-105.263333,40.007222,2017784.9247938,4582279.26962773,34,36 "Eng_North_GENI",0,2578,"4451DB:000701",-105.263333,40.007222,2017784.9247938,4582279.26962773,34,308 Lat/Lng are given in EPSG:4326 and Easting/Northing in EPSG:32160. The BSs on channels 36, 76, and 116 are identical, installed by Airspan and maintained by the University of Colorado IT Services. They each have a 90 degree sector pointed in the azimuthal orientation indicated. The fifth BS is an experimental GENI WiMax ("http://groups.geni.net/geni/wiki/WIMXUCO") node, using NEC hardware and maintained by researchers in the University of Colorado Computer Science Systems Laboratory.data collection methodology:Data collection was performed an Anritsu MS2721B portable spectrum analyzer, which was controlled over a National Instruments VISA interface using a Linux netbook computer and an Ethernet interface. The included source "measure.c" is the NI/VISA code that was used to collect each measurement point. The measurement devices were attached to a bicycle/hand cart. At each point, a GPS reading was taken from a hand-held Garmin GPS60 (the GPS on the Anritsu was not usable). The data contains measurements from 4 distinct campaigns: A: A 100m triangular lattice grid sample of the main CU campus, focusing on channel 76 only B: A 100m triangular lattice grid sample of the main CU campus, on the remaining channels C: Uniform random second-phase sample, focusing on channel 308 only D: Optimized second-phase samples, focusing on channel 308 only

本数据集为美国科罗拉多大学博尔德分校（University of Colorado Boulder）校园内使用便携式频谱分析仪采集的WiMax测量数据。该数据集包含服务于科罗拉多大学校园的WiMax网络的精准点位测量结果，采用便携式频谱分析仪完成采集，涵盖载波干扰噪声比（CINR, Carrier to Interference plus Noise Ratio）、接收信号强度（RSS, Received Signal Strength）、误差矢量幅度（EVM, Error Vector Magnitude）、接收信道误差（RCE, Received Channel Error）、频谱平坦度与频偏等高精度测量指标。
第一阶段采样采用100米等边三角形格网布局，共采集数百组测量数据；第二阶段补充采样则在随机点位与优化点位完成。本次测量的起始与结束时间均为2011年5月1日。

采集环境与基站参数：
数据采集于美国科罗拉多大学博尔德分校校园内，所有测量均以被动方式完成，仅具备普通客户端设备所能获取的WiMax网络访问权限。本次共测量5个不同基站（BSs, Base Stations），均运行于2.5 GHz教育许可频段，各基站详细参数如下：
1. Gamow_West：方位角235°，中心频率2530 MHz，基站ID为"000000:000101"，经纬度（EPSG:4326）为-105.267778, 40.008056，东向/北向坐标（EPSG:32160）为2017383.55491878, 4582293.92520922，离地高度46米，信道编号116
2. Gamow_East：方位角90°，中心频率2520 MHz，基站ID为"000000:000102"，经纬度（EPSG:4326）为-105.267778, 40.008056，东向/北向坐标（EPSG:32160）为2017383.55491878, 4582293.92520922，离地高度46米，信道编号76
3. Eng_East：方位角120°，中心频率2530 MHz，基站ID为"000000:000002"，经纬度（EPSG:4326）为-105.263056, 40.007222，东向/北向坐标（EPSG:32160）为2017808.74220088, 4582284.16821699，离地高度34米，信道编号116
4. Eng_West：方位角240°，中心频率2510 MHz，基站ID为"000000:000001"，经纬度（EPSG:4326）为-105.263333, 40.007222，东向/北向坐标（EPSG:32160）为2017784.9247938, 4582279.26962773，离地高度34米，信道编号36
5. Eng_North_GENI：方位角0°，中心频率2578 MHz，基站ID为"4451DB:000701"，经纬度（EPSG:4326）为-105.263333, 40.007222，东向/北向坐标（EPSG:32160）为2017784.9247938, 4582279.26962773，离地高度34米，信道编号308

其中信道36、76与116对应的基站为同一套部署设备，由Airspan公司安装、科罗拉多大学信息技术服务部维护，每个基站均配置有指向对应方位角的90°扇区天线。第五个基站为实验性GENI WiMax节点（详见http://groups.geni.net/geni/wiki/WIMXUCO），采用NEC硬件，由科罗拉多大学计算机科学系统实验室的研究人员维护。

数据采集方法：
本次数据采集使用安立（Anritsu）MS2721B便携式频谱分析仪，通过National Instruments VISA接口，由搭载Linux系统的上网本与以太网链路完成控制。附带的源文件`measure.c`即为用于采集各测量点位的NI/VISA控制代码。测量设备挂载于自行车/手推车上，每个测量点位均通过手持Garmin GPS60设备获取定位信息（安立频谱仪自带GPS功能不可用）。

本数据集包含4组独立采集任务：
A：以100米等边三角形格网对科罗拉多大学校园主区域进行采样，仅关注信道76
B：以100米等边三角形格网对科罗拉多大学校园主区域进行采样，覆盖其余所有信道
C：第二阶段均匀随机采样，仅关注信道308
D：第二阶段优化点位采样，仅关注信道308