Channel-Matched Receiver for Throughput Enhancement in OFDM

In this paper we present two throughput enhancing detection schemes for OFDM, all using the Frequency Domain Channel Length Indicator (FCLI) algorithm for improved channel estimation and joint mobile channel impulse response length estimation. At first we introduce a novel optimized detection scheme for guardinterval-free OFDM reception. In contrast to traditional OFDM, omitting the guard interval (GI) can achieve a significant enhancement of throughput and spectral efficiency. Performance of GI-free OFDM is limited by intersymbol & interchannel interference (ISI & ICI). By applying our novel optimized ISI-ICI cancellation algorithm, we show that performance loss of GI free OFDM can be reduced to a negligible amount. As an alternative to GI free OFDM we present an FCLI-based GI adaptation scheme and compare both approaches in terms of system throughput enhancement.