Radiolocator Design: High-Frequency Front End
We have seen in Chaps. 2 and 3 that the direction of an incoming wave can be reconstructed from the interaction of that wave with an assembly of directional antennas of known characteristics. In this chapter, we begin to look at the engineering aspects of collecting data from the antennas, and, in the spirit of good design practice, we will outline the system requirements and consider some plausible architectures.
The overarching requirement in our entire radiolocation work is that the direction of the incoming wave be obtained for every wireless packet, and that the direction be assigned to that packet before the next one arrives, i.e., at the rate of wireless traffic. Two requirements follow:
(1) Signal strengths on all antennas must be captured during the passage of the packet. Antenna signals must be captured consistently, that is, they must all be measured at the same (average) carrier amplitude.
(2) Logical content of the packet must be decoded as usual, i.e., networking communication must not be impeded by radiolocation.
KeywordsAntenna Element Automatic Gain Control Noise Floor Incoming Wave Baseband Signal
- Antolovic, D., Wallace, S. Design of a Radio-Frequency Multiplexer, Used in Radiolocation of 802.11 Wireless Sources, Proceedings of IEEE International Conference on Portable Information Devices, Orlando, FL, March 2007, (2007)Google Scholar
- Antolovic, D. Numerical Investigation of Algorithms for Multi-Antenna Radiolocation, Proceedings of 2009 IEEE International Conference on Portable Information Devices, Anchorage, AK, September 2009, (2009)Google Scholar
- American Radio Relay League, ARRL Antenna Book, American Radio Relay League, Newington, CT (2000)Google Scholar
- Besser, L., Gilmore, R. Practical RF Circuit Design for Modern Wireless Systems, Artech, Boston (2003)Google Scholar
- Bogatin, E. Signal Integrity Simplified, Prentice Hall, NJ (2004)Google Scholar
- Horowitz, P., Hill, W. The Art of Electronics, Second Edition, Cambridge University Press, Cambridge (1989)Google Scholar
- IPC Association. IPC-2251, Design Guide for the Packaging of High-Speed Electronic Circuits, IPC Association, Northbrook, IL (2003)Google Scholar
- Johnson, H., Graham, M. High-Speed Digital Design, Prentice Hall, NJ (1993)Google Scholar
- Konsowski, S.G., Gipprich, J.W. Substrates for RF and Microwave Systems, in High Performance Printed Circuit Boards, C.A. Harper ed., McGraw-Hill, Boston, MA (2000)Google Scholar
- Maxim Integrated Products. Data sheet for MAX2620, http://www.maxim-ic.com/ (2002)
- Maxim Integrated Products. Data sheet for MAX2820, http://www.maxim-ic.com/ (2003)
- Mentor Graphics, http://www.mentor.com/products/pcb/expedition/analysis_verification/ hyperlynx/index.cfm
- Peregrine Semiconductor Corp. Data sheet for PE4257, http://www.peregrine-semi.com/ (2005)
- Pozar, D.M. Microwave Engineering, Wiley, New York (1998)Google Scholar
- Wadell, B.C. Transmission Line Design Handbook, Artech, Boston (1991)Google Scholar