Title :
Digital OFDM transmitter based on multi-bit delta sigma modulator
Author :
Zaijun Hua; Xiangning Fan; Li Tang
Author_Institution :
Institute of RF-&OE-ICs, School of Information Science and Engineering, Southeast University, Nanjing, 210096, China
Abstract :
An orthogonal frequency division multiplexing transmitter based on multi-bit delta sigma modulator with switch mode power amplifiers is presented. Multi-bit up-conversion mixer and power amplifiers are revealed. With a 3-bit delta sigma modulator, an IEEE 802.11a based transmitter is simulated. Results show that the error vector magnitude of this transmitter achieves -20.74dB for 64-QAM. With up to +10% gain imbalance for the most significant bit, the transmitter´s accuracy degrades 1.5dB.
Keywords :
"OFDM","Transmitters","Modulation","Mixers","Presses","Delta-sigma modulation"
Conference_Titel :
Microwaves, Communications, Antennas and Electronic Systems (COMCAS), 2015 IEEE International Conference on
DOI :
10.1109/COMCAS.2015.7360437
