Research of OFDM System for PLC in UCM Based on Precoder Algorithm

Wei, Shaoliang; Cheng, Fengyu; Qi, Tao; Cao, Jialin; Chen, Yimin

doi:10.1109/fbie.2008.58

Cited by 1 publication

(1 citation statement)

References 3 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This latter is achieved by adopting diversity schemes that exploit copies of the transmitted signal in time, frequency or spatial domains, or in a combination of them, thus yielding a diversity gain which enhances the bit error rate (BER) performance. Surprisingly, this issue has been investigated in underground channels only in [6][7] by adopting a transmit precoding scheme which is known for its prohibitive complexity and need for perfect channel state information (CSI) at the transmitter. However, this scheme requires the availability of a feedback channel from the receiver to the transmitter that provides CSI that is not outdated and must use a minimum number of feedback bits.…”

Section: Introductionmentioning

confidence: 99%

On the Performance Enhancement When Combining STBC and Channel Estimation Techniques in Underground MIMO Channels

Boualleg

Ghanem

Haraoubia

et al. 2016

Antennas Wirel. Propag. Lett.

View full text Add to dashboard Cite

One way to enhance the channel data rate in enclosed environments is by incorporating Multiple Input Multiple Output (MIMO) systems. Very often, this comes at the cost of data reliability. Motivated by the proven efficiency of Space Time Block Coding (STBC) technique in conventional MIMO systems in improving the communication quality, we propose to incorporate it in wireless underground MIMO communication system and investigate data reliability at the reception in terms of bit error rate (BER). For this purpose, an intensive channel measurement campaign was performed in a mine-laboratory in Northern Canada to obtain the perfect channel state. As a second step, the underground MIMO channel is estimated by sending a pilot sequence and using minimum mean square error (MMSE) principle on the received pilots. The resulting MIMO channel estimate is used to evaluate the data part in the STBC block and perform a decision using the maximum likelihood (ML) detector. Moreover, both the channel and transmitted data estimates are given analytically and the degradation of the BER performance of the system due to MMSE estimation errors is studied using Monte Carlo simulations.

show abstract

Section: Introductionmentioning

confidence: 99%