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| Articles
by
Feng Xingle |
Total Records (
2 ) for
Feng Xingle |
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Liu Zunxiong
,
Xu Zheng
,
Feng Xingle
and
Lu Zhaogan
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In current 4G system given in recent literatures, channel
estimation overhead and complexity of Multi-User Detectors (MUD), may
lead to bad performance in fast fading channel scenarios when large number
of users exists. So, a novel 4G system with TDD/TDMA as duplex and wireless
access is designed to reduce channel estimation spending and avoid MUD,
as only one user can be active to communicate with base station. Under
the requirement of 4G systems, radio frame structure is elaborately designed
to fit for fast fading channel scenarios. The system architecture with
consideration of link adaptations for a novel eigenmodes coupled universal
space-time codes, is given and evaluated for performance of TDD/TDMA 4G
systems. Results show the proposed TDD/TDMA 4G can meet the requirement
of 4G system under the classical ITU channel profiles. |
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Feng Xingle
,
Cheng Yan
,
Chen Peng
and
Quan Nana
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Due to coordination of performance and complexity in multiple-input
multiple-output system at the same time, this paper proposes a group interference
suppression detection algorithm sphere decoding ordered successive interference
cancellation (SD-OSIC) based on adaptive modulation. It adopts the strategy
of group detecting, the signal with high Signal to Noise Ratio (SNR) is detected
by Sphere Decoding (SD) algorithm instead of the maximum likelihood one and
the rest of the signal is detected by Ordered Successive Interference Cancellation
(OSIC). Nevertheless, it also takes the receiving SNR as a parameter to modulate
the transmitting signal adaptively. The simulation results show that the SD-OSIC
detection based on adaptive modulation can achieve higher spectrum efficiency
than fixed modulation as well as having a performance. |
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