Channel estimation is a very important process in the operation of MIMO-OFDM systems, as it is vital for accurately estimating the Channel Impulse Response (CIR) of the channel under various conditions. As such, it is useful to have a Simulink simulation to model the behavior of the channel estimation process in a MIMO-OFDM system, in order to study the error rate of the system under different modulation and SNR conditions. As one of the most common transmitter diversity schemes used in MIMO-OFDM systems is Alamouti’s Space Time Block Code (STBC), a Simulink model is developed for performing channel estimation, assuming that the STBC is used. The model will then generate graphs of error rates vs SNR for different modulation schemes. The results show great improvement in Bit Error Rate (BER) by utilizing a Reed-Solomon Forward Error Correction code (RS-FEC) method.Keywords: Alamouti’s ST Block Code, MIMO-OFDM, STBC, Channel Estimation, IEEE802.16a, MIMO-OFDM MATLAB®/ Simulink

Space–time block code

Transmit diversity

10.17485/ijst/2016/v9is1/110173

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Combined coding and cryptography based on LDPC codes

Sunil Govinda Bahram Honary C. Catherine K. S. Soyjaudah

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Airduino Guitar

Indian Journal of Science and Technology (2016)

Shahid Manzoor Mouaiad Albacha Sunil Govinda

The objective of the AIRduino Guitar project is to imply the theoretical knowledge on a practical device and build a device that translates the numbers into measured or heard such as in this case results. This work is worthy to use in many technical areas and not sounded to the field of interest in any project as there many applications where the same microcontrollers and sensors could be utilized for different purposes. In simple explanation the accelerometer is to detect the motion on the right hand and the ultrasonic is to detect the distance between the two hands to generate a waveform based on the data collected from both the sensors combined with fingers connection in order to imitate to the full operation process of the real guitar using the microcontroller to compute an output sound as close to the real guitar as possible. The project was built using Arduino UNO microcontroller, ADXL345 accelerometer, and a Parallax PING))) ultrasonic distance meter to generate a guitar-like sound which was enriching in both the knowledgeable and the amusement sides.Keywords: AIRduino, Parallax PING))) Ultrasonic Distance Sensor, UNO Microcontroller

Guitar

Ping (video games)

10.17485/ijst/2016/v9is1/110171

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Matlab Design and Power Analysis of MPPT Controller for Solar PV Using Perturb and Observation Algorithm

Advanced Science Letters (2018)

Ahmed O. Mohamed Zain C. Huang Shen Sunil Govinda F.Y.C. Albert Ammar A. Al-Talib

Maximum power principle

10.1166/asl.2018.12393

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