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In this research, we improve the performance of the OFDM time synchronization using autocorrelation and crosscorrelation with statistical refinement. At first, the time estimation is performed using autocorrelation and crosscorrelation. The result of this estimation is refined using statistical technique to obtain a robust estimate of correct timing, especially on multipath channel system. Computer...
Direction of arrival estimation (DoA) using sparse reconstruction gives advantage on minimizing the number of required samples. Among available sparse reconstruction schemes, angle sparsity has shown a favorable advantage as it requires fewer samples compared to other schemes. Previous researches on angle sparsity utilized an exhaustive scanning on every possible arrival angles. This technique leads...
The heart is a vital organ that needs to be monitored periodically by everyone, including athletes and heart patients. Heart condition of an athlete requires special attention to keep his/her stamina and performance, however monitoring the heart signal during athlete activity is challenge to be solved. In this research, we developed a mini wearable ECG device and real time arrhythmia detection based...
Based on IEEE 802.11 standard, frequencies of WLAN are: 2.4–2.474 GHz, 5.15–5.35 GHz, 5.475–5.725 GHz, and 5.725–5.825 GHz. Based on WiMAX Forum standard, two major band on certification profile for Fixed WiMAX (band 3.5 GHz and 5.8 GHz) and Mobile WiMAX comprises four frequencies, band 2.3 GHz, 2.5 GHz, 3.3 GHz and 3.5 GHz. At this research, design and implementation of triple-band antenna for WiMAX/WLAN...
ITU-T G.729B describes about Discontinuous Transmission (DTX) in the system. Discontinuous Transmission (DTX) is known as a transmission method that transmits a few bits of voice under influenced of background noise or un-voiced signal. This characteristic gives advantageous in voice activity detection to classify signal. In this paper we improve the performance of voice activity detection G729B using...
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