Title :
The time domain-based interpolation and decimation processing for N-tone sigma-delta circuit in UWB-OFDM transceiver
Author :
Mar, Jeich ; Lin, You-Rong
Author_Institution :
Yuan-Ze Univ., Jungli
Abstract :
A new null quantization noise canceling structure designed with the time domain-based interpolation and decimation for the N-tone sigma-delta modulation (SDM) UWB- OFDM transceiver is proposed. The required length of IFFT and FFT processing will not change with the interpolation factor. The bit error rate (BER) for QPSK, 16-QAM and 64-QAM UWB- OFDM transceiver using the 128-tone SDM circuit with the optimum quantization size and additive white Gaussian noise (AWGN) channel are simulated. The null quantization noise floor generated from the 128-tone SDM circuit can be avoided when the proper interpolation factor is chosen. The proposed null quantization noise cancellation structure can greatly reduce the hardware gate count and processing time of the N-tone SDM UWB-OFDM transceiver.
Keywords :
AWGN channels; OFDM modulation; error statistics; interference suppression; interpolation; quadrature amplitude modulation; quadrature phase shift keying; sigma-delta modulation; time-domain analysis; transceivers; ultra wideband communication; N-tone sigma-delta modulation circuit; UWB-OFDM transceiver; additive white Gaussian noise channel; bit error rate; decimation processing; null quantization noise canceling structure; quadrature amplitude modulation; quadrature phase shift keying; time domain-based interpolation; AWGN; Additive white noise; Circuit noise; Delta-sigma modulation; Gaussian noise; Interpolation; Noise cancellation; OFDM; Quantization; Transceivers; N-tone sigma-delta modulation (SDM); UWB-OFDM; decimator; interpolator; quantization noise;
Conference_Titel :
Information, Communications & Signal Processing, 2007 6th International Conference on
Conference_Location :
Singapore
Print_ISBN :
978-1-4244-0982-2
Electronic_ISBN :
978-1-4244-0983-9
DOI :
10.1109/ICICS.2007.4449685
