Seyed Hamidreza Jamali

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In this paper, a stair-planar phased array antenna system for mobile broadcast satellite reception in Ku-band will be introduced. The height of the antenna is only 6 cm and the system has two-dimensional electronic scanning capability. The design procedures of low profile high gain microstrip sub-array antennas, low noise amplifiers, hybrid analog phase(More)
Transmission By: R. Hoshyar, S. H. Jamali, and A. R. Bahai Dept. of Elect. & Computer Eng., University of Tehran Email: and Abstract: In transmission of the packets using OFDM (Orthogonal Frequency Division Multiplexing) system recommended by IEEE.802.11 [1] there is a constraint on the interleaving depth due to the(More)
In this paper, deliberate level clipping and turbo coding are combined to achieve an orthogonal frequency division multiplexing (OFDM) transmission system with a low peak-to-average power ratio (PAR) and a good performance. Using the linear approximation technique based on the minimum mean square error (MMSE) criterion, we first modify the metric(More)
Multiple antenna systems that operate at high rates require simple yet effective space-time transmission schemes to handle the large traffic volume in real time. In the last investigations, LD (Linear Dispersion) codes were proposed that can handle any configuration of transmit and receive antennas. This scheme transmits substreams of data in linear(More)