DURIP FY 1999: Research Instrumentation for a Wireless Communications Research Laboratory
Abstract
An experimental test-bed has been constructed for evaluating synchronization, equalization, and interference cancellation algorithms for digital communications. The transmitter portion of the test-bed consists of a baseband digital modulator composed of either a DSP development station or a custom digital circuit, a digital up-converter, and an RF transmitter unit. This configuration provides sophisticated digital modulations for wireless communications in an easily adaptable framework. The receiver portion consists of an RF receiver unit, an analog-to-digital converter (ADC), a digital down-converter, and a data acquisition unit. The RF receiver, essentially the reverse function of the RF transmitter unit discussed above, receives the RF signal and converts it to an IF for further processing. This provides a wide frequency coverage; a large dynamic range, a built in automatic gain control (AGC), and a baseband down-converter. The local oscillator (LO) is generated by a synthesized signal generator. The overall configuration provides a high performance flexible system for digitizing and outputting sampled data for further processing. The baseband data is stored in a PC using the data acquisition system and transferred to a workstation running SPW for analysis and demodulation. This test-bed serves as a general purpose RF transmitter and receiver allowing concentration of efforts on baseband algorithms and thereby rapid prototyping for broadband applications as in GPS or wideband CDMA.
Document Details
- Document Type
- Technical Report
- Publication Date
- Aug 01, 1999
- Accession Number
- ADA386082
Entities
People
- Michael D. Zoltowski
Organizations
- Purdue University