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The downlink positioning method specified by 3GPP is a part of LTE location service. The method utilizes the time difference of Positioning Reference Signal (PRS) for ranging, therefore time delay estimation of PRS is a fundamental question in the method. A conventional algorithm relies on time correlation however faces challenges in multipath channel. For OFDM signal, Multiple Signal Classification...
A novel method is proposed to designed OFDM-coded signals for multiple input multiple output(MIMO) radar systems. The proposed method can fundamentally improve radar performance by using a group of specially designed OFDM-coded signals. The genetic algorithms (GA) is used to numerically optimize such OFDM-coded code sets. Some of the designed results are presented and they indicate that the proposed...
This paper proposes a coarse time synchronization method which reduces the influence of the inter symbol interference(ISI) for MIMO-OFDM systems. The proposed method extracts the timing which is not disturbed by delay spread within the guard interval (GI) by utilizing the cyclic prefix (CP). Thus, the proposed method is effective in reducing the influence of the ISI. Simulation results demonstrate...
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