Radicom WiFiHU2S-a/c, Preliminary Designer’S Manual

3

Introduction 

 
Thanks for purchasing Radicom Research’s SMD WiFi Module. Radicom is committed 
to providing quality service and technical support in order to expedite the product 
development process. The WiFiHU2S Module is designed to fully support 

IEEE802.11n™

 Draft 2.0, 

IEEE802.11e™

 and 

IEEE802.11i™

 standards. If further 

information is required, please contact us and we will provide any additional help needed. 
The WiFiHU2S series offers SoftAP support.  It can turn your Internet connected PC or 
Laptop into a WiFi Wireless Access Point.  So any WiFi device such as iPhone, iPod, 
PDA, within range can connect to Internet by sharing your WiFiHU2S Access Point.

The 

WiFiHU2S-a/c requires significant CPU power to run in SoftAP mode on 
802.11n. Unless you have a very powerful CPU, it is recommended to use the SoftAP 
mode of WiFiHU2S in 802.11b or g modes only. 

Features 



  SoftAP support (Software enabled Access Point) 



  Supports ACCESS Point (Host WiFi) 



  IEEE 802.11b/g/n compatible WLAN 



  150Mbps receive PHY rate and 75Mbps transmit PHY rate using 20MHz bandwidth 



  300Mbps receive PHY rate and 150Mbps transmit PHY rate using 40MHz bandwidth 



  20MHz and 40MHz bandwidth transmission 



  Operates in 2.4GHz Frequency Range 



  Compatible with 802.11n draft 2.0 specification 



  Backward compatible with 802.11b/g devices while operating at 802.11n data rates 



  Frame aggregation for increased MAC efficiency (A-MSDU, A-MPDU) 



  Low latency immediate High-Throughput Block Acknowledgement (HT-BA) 



  Long NAV for media reservation with CF-End for NAV release 



  PHY-level spoofing to enhance legacy compatibility 



   Hardware antenna diversity 



  Channel management and co-existence 



  Multiple BSSID feature allows multiple MAC identities when used as a wireless bridge 



  Supports Wake-On-WLAN via Magic Packet and Wake-up frame 



  Transmit Opportunity (TXOP) Short Inter-Frame Spaces (SIFS) bursting for higher 

multimedia bandwidth 



  Short Guard Interval (400ns) 



  DSSS with DBPSK and DQPSK, CCK modulation with long and short preamble 



  OFDM with BPSK, QPSK, 16QAM, and 64QAM modulation  

    Convolutional Coding Rate: 1/2, 2/3, 3/4, and 5/6 



  OFDM receive diversity with MRC using up to 2 receive paths. Switch diversity used            

for DSSS/CCK 



  Selectable digital transmit and receive FIR filters 



  Programmable scaling in transmitter and receiver to trade quantization noise against 

increased probability of clipping 



  Fast receiver Automatic Gain Control (AGC)