In general, if the maximum delay spread is longer than guard interval (GI), the system performance is significantly degraded. The conventional time-frequency interferometry (TFI) for OFDM does not consider with timevariant large delay spread channel. In this paper, we propose a novel time domain inter-symbol-interference (ISI) cancellation scheme with replica signal based inter-carrierinterfere...

Wireless communication systems are affected by several factors in the indoor environment. The complexity of this environment, however, has hampered the development of methods for analyzing it. Reported here is our investigation of the relationship between the propagation characteristics and performance of a 2.4-GHz ISMband wireless LAN in various indoor environments. Our objective was to develo...

Conventional OFDM transmission system uses a fixed-length Cyclic Prefix to counteract Inter-Symbol Interferences (ISI) caused by channel delay spreading under wireless mobile environment. This may cause considerable performance deterioration when the CP length is less than the channel RMS delay spread, or may decrease the system power and spectrum efficiency when it is much larger. A novel OFDM...

Space-time coding for the flat fading, quasistatic MIMO wireless channel has received wide spread attention. This paper treats space-time code design for frequency selective channels from a single carrier modulation perspective. We present a general framework for analyzing space-time codes for delay spread channels based on PEP analysis. It is shown that as in the flat fading case, diversity ga...

This paper reports 62.4GHz fixed wideband propagation measurements undertaken in six different LOS indoor environments (corridors and rooms) inside three buildings. Measurement analyses are presented in respect of static RMS delay spreads and received signal level. Uniformity of delay spread was observed for all the cases investigated. A correlation is observed with the static delay spread incr...

It is important to clearly understand multipath propagation to develop high speed digital mobile communication system(l-$) . The r.m.s. delay spread can be directly obtained by measuring the delay profile. The problem has been that delay profi Ie measurements that are accurate must be taken for a wide frequency band. For example, with wideband measurement equipment using pseudo-noise signals, a...