Redline Communications Inc. AN100UA 用户手册

™

 

 

 

Doc. #70-00058-01-01 

Proprietary Redline Communications © 2007 

July 13, 2007 

Page 95 of 119

 

 

 

Table 36: Op Notes: Receive Sensitivity Tests 

288 50,000 97  1x10-6 

 300,000 

100 1x10-9 

864 20,000 118 1x10-6 

 100,000 

55 1x10-9 

1,488 10,000 100  1x10-6 

 60,000 

57 1x10-9 

Redline has introduced several techniques into its products to mitigate interference 
issues:  
1.  OFDM: multiple carriers using both time and frequency diversity to provide high 

tolerance to co-channel and adjacent channel interference, remove ISI due to 
multipath and recover data from carriers falling in regions of deep channel fades. 

2.  Multiple channels (twenty-eight non-overlapping at 3.5 MHz) for diversity and 

interference mitigation. 

3.  Adaptive modulation using six transmission rates to suit varying link conditions. 
4.  Adaptive encoding is heavily coded to substantially increase robustness. State of the 

art FEC using Convolutional-coding gives the base station superior frequency 
selective fading mitigation capability. 

5.  Narrow beam antennas with high side lobe and backlobe isolation and very low 

VSWR. 

6.  Antenna cross-polarization enabling equipment co-location as well as effective 

frequency planning. 

7.  High receiver dynamic range to address dynamic interference. 
8.  State of the art filtering at the RF, IF and baseband levels to reduce interference. 
9.  Choice of non-adaptive modulation to provide stable burst rate during periods of 

rapid interference variations on the link.