New direction of broadband wireless technology

Fumiyuki Adachi, Eisuke Kudoh

Research output: Contribution to journalArticlepeer-review

47 Citations (Scopus)


The most important technical challenge for the realization of 4G mobile networks is twofold: (a) to overcome the highly frequency-selective fading channel and (b) to significantly reduce the transmit power from mobile terminals. Recently, it has been shown that the application of frequency-domain equalization (FDE) can take advantage of channel frequency-selectivity and improve the transmission performance of single-carrier (SC) as well as multi-carrier (MC) signal transmissions. Either SC or MC can be used for the downlink (base-to-mobile) to achieve almost the same bit error rate (BER) performance. However, for the uplink (mobile-to-base) applications, SC transmission is more appropriate since it has less peak power. For broadband data transmissions, transmit power reduction is a very important issue. Applying wireless multi-hop technique is a possible solution to this issue. In this paper, we will discuss about some important 4G wireless techniques.

Original languageEnglish
Pages (from-to)969-983
Number of pages15
JournalWireless Communications and Mobile Computing
Issue number8
Publication statusPublished - 2007 Oct 1


  • Cellular network
  • Equalisation
  • Mobile communications
  • Multi-carrier
  • Multi-hop
  • Single-carrier
  • Wireless access

ASJC Scopus subject areas

  • Information Systems
  • Computer Networks and Communications
  • Electrical and Electronic Engineering


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