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Front end for software receiver
Slezák, Jakub ; Horský, Pavel (referee) ; Šrámek, Petr (advisor)
This thesis deals with a theoretical analysis of the basic parameters of receivers, input circuit architecture and signal digitization. According to the specified assignment it is outlined block scheme of front end for software receiver with specified components and the total bilance is calculated. Individual parts of the system are designed and realized. This is a set of four input filters for bandwidths: short waves up to 30 MHz, 87,5-108 MHz, 144-148 MHz and 174-230 MHz. The main point of design is a circuit containing a low-noise amplifiers, switches, and two amplifiers with adjustable amplification. Mainly are used integrated circuits from Analog Devices corporation. To control the various switches and adjustable amplifiers was designed a separate panel, which is connected to the main circuit via a cable. In the last phase was the whole system and its components subjected to measurements. Thanks to a number of mounted SMA connectors it is possible to measure different parts of the system and we are able to modify it partially.
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Realization of digital oscilloscope
Kulig, Tomáš ; Michal, Vratislav (referee) ; Frýza, Tomáš (advisor)
This work is focused to digital handheld oscilloscope. Input circuits are solved by analog devices. DSP (Texas Instruments company) will be used for fast processing of signals from output A/D convertors. LCD display with touch screen is used for interaction with user. The result will be fully functional device. It would measure voltage waveforms within the scope from tens mV to tens V with transmission bandwith from direct-current signal up to tens of MHz
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Implementation of software radio into FPGA
Šrámek, Petr ; Maršálek, Roman (referee) ; Prokeš, Aleš (advisor)
The common objective of this project is implementation of software defined radio (SDR) into FPGA. The text contains review and comparison of several hardware concepts intended for SDRs implementation then the methods for digital implementation of various components of radios as the filters, mixers and others are mentioned. Part of the text introduces used hardware platform and describes software support for designing, simulations and implementation into hardware. Significant part of project describes complex of external hardware components as filter, amplifier and control panel designed and built within the project realization. But the main part of project demonstrates design of the software solution of radio receiver. There is specified architecture of radio for FM broadcast receiving, next the more complex systems with carrier recovery algorithm are presented. These systems are able to work with AM, BPSK and QPSK modulations. It is possible to implement all these receivers into hardware and verify their operation. The practical laboratory theme has been outlined within the project run.
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Battery powered datalogger
Rezek, Petr ; Kučera, Pavel (referee) ; Bradáč, Zdeněk (advisor)
The diploma thesis deals with the questions of battery powering, measuring of analog physical values using microcontroller and recording of data on a memory SD card Bibliographic reference: REZEK, P. Battery powered datalogger. Brno: Brno University of Technology, Faculty of Electrical Engineering and Communication, 2008. 65 p. Supervisor: Ing. Zdeněk Bradáč, Ph.D.
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