2×2 LCX-MIMO System In Real Indoor Linear-cell Environment

Zhang Hao (1651212)

LCX (Leaky Coaxial) cable has already been deployed in mine tunnel for transmission of wireless signal for decades. With a special structure, LCX cable can transmit the signal as an electric cable and send the radio as a wireless antenna at same time. Thence in those scenarios, by LCX cables wireless signal can easily cover long distance and reduce the reflection by the environment. Compared with conventional omni-directional antennas, LCX cables are able to provide more stable and steady radio waves to improve the performance.

To improve more the channel capacity, LCX cable can also build Multiple-Input-Multiple-Output (MIMO) system. In the past, one LCX cable was only treated as one antenna. Our study is focusing on that one LCX cable is treated as two antennas for increasing the efficiency and reducing the interference. This proposed LCX-MIMO can almost double the throughput comparing with traditional SISO system. In addition, we designed some experiments for confirming the feasibility of this method in the real environment. Our experiments also prove that the LCX has better performance than conventional omni-directional antennas

A new method that one LCX cable can be used as two antennas has been proposed. Therefore only one LCX cable can build a 2-by-2 multiple-input multiple-output (MIMO) systems by inputting signal in both ends of LCX cable. However, until now, all research results were measured and compared in an anechoic chamber where reflection paths did not exist. This paper reports the measured throughput performance of mentioned 2-by-2 LCX-MIMO system under 5GHz band in an indoor linear-cell environment. The measurement results demonstrate that our proposal can double system throughput compared with that of system using LCX cable as conventional way. In addition, compared with the 2-by-2 MIMO system employing two omni-directional antennas at transmitter and receiver, LCX-MIMO builded by the method that one LCX cable can be used as two antennas system can achieve superior throughput performance at some measurement positions over the indoor linear-cell environment.

Language of the presentation: English