A High Performance Baseband Instrument

Jeremy W. Webb,
Masters Thesis
VLSI Computation Laboratory
Department of Electrical and Computer Engineering
University of California, Davis
Technical Report ECE-VCL-2011-1, VLSI Computation Laboratory, University of California, Davis, 2011.


Testing complex digital signal processors (DSPs) requires a development platform with sufficient signal bandwidth and system performance to fully exercise the DSP. Without a development platform, verification of DSPs would be limited to monitoring test output signals for an indication of performance and successful operation. In addition, a development platform with high-speed analog input and output interfaces to the DSP system allows it to be used directly in many sophisticated real-time applications. Presented here is a 334-processor development platform for testing of the Asynchronous Array of Simple Processors (AsAP). This platform, known as the General Purpose Instrument, is capable of generating and analyzing baseband signals. The General Purpose Instrument simplifies the testing and characterization of the AsAP processor when performing real world DSP tasks. The General Purpose Instrument is a flexible platform capable of targeting a wide variety of applications, such as signal generation and signal analysis, and includes: a 12-bit, 500 MS/s analog-to-digital converter (ADC) input, a dual-channel, 16-bit, 1 GS/s digital-to-analog converter (DAC) output, a Xilinx Virtex-5 SX50T data path field programmable gate array (FPGA), a Xilinx Spartan-3A XC3S1400A control FPGA, a 36 Mbit QDR-II static random access memory (SRAM), a 2 GB DDR2 synchronous dynamic random access memory (SDRAM), a 512 Mbit DDR SDRAM, and two 2 GB microSD cards. The signal analyzer input operates with a –3 dB frequency of 134 MHz, and has a noise floor of –98 dBm. The signal source output operates with a –3 dB frequency of 138 MHz, a spurious-free dynamic range (SFDR) of 68.49 dBc at a power level of –6 dBFS, and a signal-to-noise ratio (SNR) of 101.02 dBc.



BibTeX entry

VCL Lab | ECE Dept. | UC Davis