This thesis describes a real-time software-defined-radio implementation of the time-slotted round-trip carrier synchronization protocol in two-source and three-source communication systems. The techniques developed in this thesis can be used to synchronize the carriers of two or three single-antenna wireless transmitters with independent local oscillators so that their band-pass transmissions combine constructively at an intended receiver. Synchronization is achieved via the time-slotted transmission of (i) an unmodulated primary beacon from the destination to the sources and (ii) a series of secondary unmodulated beacons between the sources. Explicit channel state information is not exchanged between the sources and/or the destination. When synchronized, the single-antenna sources are able to cooperatively transmit as a distributed beamformer and achieve increased transmission range, reduced transmission energy, and/or increased security. The experimental results in this thesis confirm the theoretical predictions and also provide explicit guidelines for the real-time implementation of a carrier synchronization technique suitable for distributed transmit beamforming.

Creator

• Zhang, Boyang

Contributors

• Klein, Andrew
• McNeill, John A.
• Brown, Donald R.

Degree

• MS

Unit

• Electrical & Computer Engineering

Publisher

• Worcester Polytechnic Institute

Language

• English

Identifier

• etd-050509-200154

Keyword

• distributed beamforming
• virtual antenna arrays
• carrier synchronization
• cooperative transmission
• sensor networks
• software-defined-radio
• Wireless Networks

Advisor

• Brown, Donald R.

Committee

• McNeill, John A.
• Klein, Andrew G.

Defense date

• 2009-05-14

Year

• 2009

Date created

• 2009-05-05

Resource type

• Thesis

Rights statement

• In Copyright

Last modified

• 2020-11-20