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Single radio system can relieve the volume expansion that most MIMO schemes result in. The former studies presenting test results have focused on either single radio transmission or single radio reception, respectively. This paper presents test results validating the concept of single radio approach for realizing compact MIMO transceivers. Spatial multiplexing 2×2 MIMO transmission and...
Beam switching in the receiving antenna generates replicas in frequency domain, which enables MIMO decoding by using just single RF. It is fascinating to demodulate MIMO signals using single RF, which relieves the volume expansion by MIMO. However, this scheme has not been verified through a test-bed especially in 4×4 MIMO case. This paper presents test results of 4×4 MIMO receiver using single RF...
In this study, the PEA method that measures the space charge distribution over time in the polymer insulation material with high voltage applied was modified. While most of the existing measurement method measures the space charge distribution only, the improved PEA method can measure both space charge distribution and conduction current simultaneously. When space charge distribution and conduction...
While the wireless technologies have experienced remarkable improvement for decades, TCP protocol haven't been properly supported the mobility features of advanced wireless networks like 3GPP Long Term Evolution(LTE). Especially for handover, TCP performance is seriously degraded by spurious timeout since the core network is congested by data forwarding between serving eNodeB and target eNodeB. In...
We propose the WLAN/HSDPA interworking architecture that enables us to interwork between HSDPA and WLAN. The WLAN/HSDPA interworking architecture defines the handover-related modules for mobile terminal and the handover switching flows among them. The proposed interworking architecture can be easily extended to support more than two heterogeneous networks. We also provide the experimental results...
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