The underground mine channel is highly hostile for communication.A sustainable communication system is required to be integrated as a multipurpose system capable of transferring all types of information such as data, ...The underground mine channel is highly hostile for communication.A sustainable communication system is required to be integrated as a multipurpose system capable of transferring all types of information such as data, voice and video on identical infrastructure.With its large bandwidth,the Ultra Wide Band (UWB)provides a promising solution to satisfy these requirements.The Multi-Band Orthogonal Frequency Division Multiplexing (MBOFDM)UWB system provides high resilience to Inter-Symbol Interference (ISI)caused by multipath fading channels.This study compares the performance of various existing multi-band UWB systems in the IEEE UWB channel and underground mine channel:MBOFDM,Multi-Band Orthogonal Frequency Code Division Multiplexing (MBOFCDM)and Multi-Band orthogonal Wavelet Division Multiplexing (MBOWI)M).Further,the application of 2D spreading to the MBOWI)M UWB system is attempted,and as a result,the Multi-Band Orthogonal Wavelet Code Division Multiplexing (MBOWCDM)UWB system is proposed.The performance of the MBOWCDM system in the IEEE UWB channel and underground mine channel is investigated.The performance of the MBOWCDM UWB system is observed to be superior to those of other multi-band UWB systems.Moreover,the MBOWCDM UWB system supports a higher data rate with low complexity and lower overheads.展开更多
In this paper, we study an innovative multiple access scheme that exploits the intrinsic properties of the wireless envi- ronment to improve the multiuser environment, so-called Channel Division Multiple Access (ChDMA...In this paper, we study an innovative multiple access scheme that exploits the intrinsic properties of the wireless envi- ronment to improve the multiuser environment, so-called Channel Division Multiple Access (ChDMA) focusing on spectral efficiency analysis and system performance. In particular, we show that Simultaneous multiuser accessing to a common destination is made possible by considering the channel impulse response (CIR) of each user as a signature. We begin by the assumption of the channel state information available at the receiver. Then, we analyze the perform- ance of the ChDMA integration in a random environment over UWB high data rate channel. Next, we discuss the de- sign of MMSE and optimal receiver structure for such a system. Additionally, we show an asymptotic analysis behavior taking into account the channel eigenvalues distribution with the associated spectral efficiency.展开更多
文摘The underground mine channel is highly hostile for communication.A sustainable communication system is required to be integrated as a multipurpose system capable of transferring all types of information such as data, voice and video on identical infrastructure.With its large bandwidth,the Ultra Wide Band (UWB)provides a promising solution to satisfy these requirements.The Multi-Band Orthogonal Frequency Division Multiplexing (MBOFDM)UWB system provides high resilience to Inter-Symbol Interference (ISI)caused by multipath fading channels.This study compares the performance of various existing multi-band UWB systems in the IEEE UWB channel and underground mine channel:MBOFDM,Multi-Band Orthogonal Frequency Code Division Multiplexing (MBOFCDM)and Multi-Band orthogonal Wavelet Division Multiplexing (MBOWI)M).Further,the application of 2D spreading to the MBOWI)M UWB system is attempted,and as a result,the Multi-Band Orthogonal Wavelet Code Division Multiplexing (MBOWCDM)UWB system is proposed.The performance of the MBOWCDM system in the IEEE UWB channel and underground mine channel is investigated.The performance of the MBOWCDM UWB system is observed to be superior to those of other multi-band UWB systems.Moreover,the MBOWCDM UWB system supports a higher data rate with low complexity and lower overheads.
文摘In this paper, we study an innovative multiple access scheme that exploits the intrinsic properties of the wireless envi- ronment to improve the multiuser environment, so-called Channel Division Multiple Access (ChDMA) focusing on spectral efficiency analysis and system performance. In particular, we show that Simultaneous multiuser accessing to a common destination is made possible by considering the channel impulse response (CIR) of each user as a signature. We begin by the assumption of the channel state information available at the receiver. Then, we analyze the perform- ance of the ChDMA integration in a random environment over UWB high data rate channel. Next, we discuss the de- sign of MMSE and optimal receiver structure for such a system. Additionally, we show an asymptotic analysis behavior taking into account the channel eigenvalues distribution with the associated spectral efficiency.
