WLAN DesignGuide

The WLAN DesignGuide for ADS provides a convenient menu-accessed set of applications for use with the WLAN Design Library for ADS. The WLAN Design Library is compliant with the 802.11a specification. It contains various system test benches and reference designs for baseband and RF portion of the 802.11a Physical layer. WLAN DesignGuide users can easily investigate important impairments such as Frequency offset, and phase noise through measurements such as: EVM, BER/PER or by simply observing the constellation diagram. Other DesignGuide content discusses a Zero IF architecture and the inherent problem of DC offset, AGC and Adjacent Channel Rejection.

The WLAN DesignGuide is included with the E8874A WLAN Design Library

The content of the DesignGuide is divided into two broad categories:

Test Templates to allow evaluation of OFDM modulation under various link impairments:

• Frequency offset between transmitter and receiver.
  
• Oscillator phase noise.
  
• Fixed point effect in FFT/IFFT implementation.
  
• Effects of Multipath.
  
• Receiver sensitivity test bench.
  
• Receiver Adjacent Channel Rejection.
  
• Receiver Alternate Channel Rejection.
  
• Power Amplifier non-linearity.
  

Zero-IF Receiver and associated Test Benches

• LO-leakage / DC-offset compensation.
  
• Automatic Gain Control (AGC).
  
• Receiver Adjacent / Alternate Channel Rejection for Zero-IF Receiver.
  

The following screen capture shows the pull down menu of the WLAN DesignGuide in ADS.

Technical Articles

Click on the following links for technical articles describing designs in which the WLAN DesignGuide was used:

• Steven Selby, Innovative Wireless Technologies, Afshin Amini and Cory Edelman, Agilent Technologies, Simulating Interference Issues Between Bluetooth PANs and 802.11g WLANs. 14-page technical paper. 30 April 2002. PDF file, 447 KB.
  
• Afshin Amini, Dingqing Lu, and Cory Edelman, A Simulation Environment for Selection of Power Amplifiers in 5 GHz WLAN Applications, DesignCon 2002, 28 January 2002. 24-page technical paper.   (PDF file, 2.8 MB)
  
• Joe Troychak, Design and Verification of IEEE 802.11a 5 GHz Wireless LAN, ChipCenter Technical Note, December 2001.   PDF Version   (PDF file, 2.1 MB).   Current issue: ChipCenter.
  

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