Title :
An ultra-wide band orthogonal digital signal generator
Author :
Yansheng, Yue ; Teng, Long
Author_Institution :
Dept. of Electron. Eng., Beijing Inst. of Technol., China
Abstract :
Three methods of generating waveform digitally are introduced. The time-domain and frequency-domain representations of a sine wave at the output of a waveform generator are carried out. Then some special problems and the solutions associated with ultra-high speed system design are given. An ultra-wideband orthogonal signal generator, whose sampling rate can reach 250 MSPS, is described. The system employs a data multiplexing architecture to decrease the speed of the memories. Test results show that the waveform generator has an excellent performance. The phase balance between two branches being less than 5 degrees, the SFDR being larger than 70 dBc, phase noise being lower than -100 dBc/Hz at 1 kHz offset can be reached when sine wave is generated
Keywords :
digital communication; frequency-domain analysis; multiplexing; signal generators; signal sampling; time-domain analysis; waveform generators; 1 kHz; RAM; SFDR; data multiplexing architecture; frequency-domain representation; phase balance; phase noise; sampling rate; sine wave; time-domain representation; ultra-high speed system design; ultra-wideband orthogonal digital signal generator; waveform generation; waveform generator; wideband digital communication systems; Clocks; Frequency synthesizers; Integrated circuit synthesis; Noise generators; Quantization; Read-write memory; Signal generators; Signal synthesis; Time domain analysis; Ultra wideband technology;
Conference_Titel :
Signal Processing Proceedings, 2000. WCCC-ICSP 2000. 5th International Conference on
Conference_Location :
Beijing
Print_ISBN :
0-7803-5747-7
DOI :
10.1109/ICOSP.2000.893517
