Low power digital baseband architecture for wireless sensor nodes

This thesis presents a digital baseband design for an upcoming wireless standards: IEEE 802.11ah. It is a branch of Wi-Fi (IEEE 802.11) standards. Compared with the previous Wi-Fi standards, this new standard has larger coverage range and consumes less energy. It is particularly suited for energy-constrained sensor applications. In contrast to...

A base station system study for LTE, UMTS and GSM/EDGE

Communication systems evolve day after day at a very fast pace. People not only have high expectations in regard of the conversation quality, but they also need more data download speeds and better coverage. The industry tries to come and fill in this expectation by developing state-of-the art systems that are cost-effective and that ensure good...

Peak-to-Average Power Ratio Reduction Techniques for Wavelet Packet Modulation

Wavelet Packet Modulation (WPM) is a novel multicarrier modulation technique and a promising alternative to the well established Orthogonal Frequency Division Multiplexing (OFDM). WPM has been shown to be an efficient technique with interesting features like adaptation and flexibility and improved characteristics in comparison to OFDM. A major...

System Design for a High Data Rate Wireless Infrared Multi language Distribution system

This thesis investigates the feasibility of high speed wireless communication for an infrared multi language distribution system and concludes that data rates near 20Mbps are practical. We identify the impediments to high speed communication, namely, multipath dispersion and weak frond-end design and propose different strategies to counter them....

An Outdoor HIPERLAN Simulator

In outdoor wireless LAN’s the large delay spread is a severe problem. There are different techniques to combat the large delay spread, namely: • multicarrier modulations • equalization • diversity • multilevel modulations In this report a simulator is described to analyze the performance of different techniques.

Performance comparison of channel estimation schemes for OFDM based broadband communication systems

In this thesis three different techniques are discussed to estimate the channel characteristics for Orthogonal Frequency Division Multiplexing based broadband communication systems. A problem with the conventional channel estimation technique, which is used frequently, is the influence of noise on top of the Rayleigh fading which is not taken...

An Analytical Performance Evaluation of a Coded OFDM-Based Transmission Scheme, using a Markov Model for a Frequency Selective Channel

In this report the performance of an error-correcting code on a wide-band frequency selective Rayleigh fading channel with an OFDM- based transmission scheme is estimated by means of an analytical model. In the European dTTb project, a transmission scheme for a new digital terrestrial TV system is under development. This scheme uses OFDM to...