From: clj@jacksons.net   
      
   On 9/12/2020 5:30 AM, telecom-request@telecom-digest.org wrote:   
   > (LTE is also Code-Division Multiple-Access but isn't "CDMA" brand   
   > CDMA)   
      
   No. LTE is OFDMA downlink; SC-FDMA uplink. In some sense it is the   
   dual of CDMA - CDMA transmits info in very short elements or bursts -   
   OFDM (and OFDMA) transmits in very long bursts. In each case, the   
   signal format allows a receiver to eliminate (or at least   
   substantially reduce) the effects of echos or ghosts of radio signals   
   (multipath).   
      
   Both OFDM and CDMA have been around for about 60-70 years. IIRC, CDMA   
   was first developed to provide protection against jamming and OFDM was   
   developed to protect against multipath on HF radio circuits.   
      
      
   See https://www.artizanetworks.com/resources/tutorials/what_lte.html   
      
   Chuck   
      
   --   
   Charles L. Jackson   
   clj@jacksons.net   
   +1 301 656 8716   
      
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