Sub-Carrier and Band Hopped Orthogonal Frequency Division Multiple Access (OFDMA) Systems |
| |
| Authors: | Muhammad Imadur Rahman Ragnar Reynisson Daniel Figueiredo Ramjee Prasad |
| |
| Affiliation: | (1) Ericsson Research, Kista, Sweden;(2) Motorola, Aalborg, Denmark;(3) Center for TeleInFrastruktur (CTiF), Aalborg University, Aalborg, Denmark |
| |
| Abstract: | This article proposes a novel way of grouping users in an orthogonal frequency division multiplexing (OFDM) communication
link based on predefined criteria. The total available spectrum is divided into a number of bands equal to the number of groups.
For efficient time-frequency resource allocation, sub-carrier and band hopping are used simultaneously. Under some constraints,
sub-carriers can also be assigned to different users based on known channel characteristics using dynamic sub-carrier allocation.
Sub-carrier and band hopping are used for mitigating the frequency selectivity of the wireless channel and for minimizing
and avoiding interference in the system. The proposed scheme is equally applicable to both downlink and uplink.
|
| |
| Keywords: | OFDM OFDMA Link adaptation Sub-carrier hopping Band hopping User grouping |
| 本文献已被 SpringerLink 等数据库收录！ |
