Ender Ayanoglu

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Orthogonal frequency-division multiplexing (OFDM) is known as an efficient technique to combat frequency-selective channels. In this paper, we show that the combination of bit-interleaved coded modulation (BICM) and OFDM achieves the full frequency diversity offered by a frequency-selective channel with any kind of power delay profile (PDP), conditioned on(More)
This paper describes the design and performance of a link-layer protocol for indoor and outdoor wireless networks. The protocol is asymmetric to reduce the processing load at the mobile, reliability is established by a combination of automatic repeat request and forward error correction, and link-layer packets are transferred appropriately during handoffs.(More)
We propose two k shortest path algorithms for selecting the route-wavelength pair in WDM networks with and without wavelength converters with orders of magnitude larger conversion gains as compared to conventional routing. We state a conclusion on the use of wavelength converters in long-distance networks.
We describe the theory, design and ongoing prototyping of a wireless ATM LAN/PBX capable of supporting mobile users with multi-Mb/s access rates and multi-Gb/s aggregate capacities. Our proposed LAN consists of network nodes called Portable Base Stations (PBS) providing microcell coverage. The PBSs are designed to be low-cost, compact and high-speed and can(More)
Multi-antenna communication systems have the potential to play an important role in the design of the next generation broadband wireless communication systems. In this paper, we study a single-user multi-antenna system with perfect channel state information (CSI) both at the transmitter and the receiver. Beamforming is used to exploit the perfect channel(More)
Recently, there has been an increased interest in the topic of “wireless ATM.” The subject matter raises interest due to the potential combination of two of the hottest topics in communications of the mid-90’s, but at the same time raises a natural question as to its viability, and sometimes even to its desirability. In this paper, we survey potential(More)
In this paper, we investigate the performance of bit interleaved coded multiple beamforming (BICMB). We provide interleaver design criteria such that BICMB achieves full spatial multiplexing of min(N,M) and full spatial diversity of NM with N transmit and M receive antennas over quasi-static Rayleigh flat fading channels. If the channel is frequency(More)