The best replacement for ofdm is ofdma.

The best alternatives to ofdm are rated as following:
★★★★★  ofdma
★★★★  cdma
★★★★  dsss
★★★  cck
★★★  fdm
★★  qam
★★  cofdm
★  fhss
★  fdma
★  single carrier
★  tdma
★  spread spectrum
★  fsk
★  fbmc
  dmt
  sc fdma
  ofdm
  qpsk
  wdm

Your alternative for ofdm is not listed? Suggest!
Speaking about ofdm, one probably shouldn't forget about qpsk.

Other search terms related to ofdm and their ratings are:
★★★★★ qpsk
★★★★ mimo
★★★ qam
You have in mind a companion for ofdm and it is not yet here? Propose!



Google Trends

Scale is based on the average worldwide traffic of ofdm in all years. Click on graph for more.
ofdm
ofdma
cdma