Wireless LAN White Papers
An OFDM Based System Proposal for 4g Downlinks
Overview This paper describes an OFDM based 4G downlink for a wide area coverage and high mobility system. User data are multiplexed and OFDM modulated such that the user with the best predicted channel conditions are always using the channel. This user employs the linear modulation scheme that maximizes the spectral efficiency. The paper shows that the system obtains a sector capacity that is significantly better than current 3G systems. Various combinations of OFDM and CDMA are also discussed and it is concluded that it is difficult to motivate the significantly increased complexity of such schemes. Moreover, it also doubts that these combinations can increase spectral efficiency when predicted channel information is utilized at the transmitter.
| Publisher | Chalmers University of Technology | File Format | |
|---|---|---|---|
| Date Published | September 2003 | ||
| Format | White Papers | ||
| Topics | |||
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