Compression of Feedback in Adaptive OFDM-Based Systems using Scheduling

Artikel i vetenskaplig tidskrift, 2007

In wireless communication, adaptive modulation and scheduling are promising techniques for a substantially increased spectral efficiency. To achieve the throughput gain, it is necessary to feedback channel quality information. The required feedback rate may be prohibitively high in many applications, and compression of the feedback information is normally required. In this paper, we propose a novel channel quality feedback scheme to be used in a wireless OFDM system, based on a data compression approach, and show that the channel information can be compressed by a factor of 5-30 with virtually no loss of system throughput.