Performance of N-tone sigma-delta modulators for UWB-OFDM

Kai Chuan Chang; Gerald E Sobelman; Ebrahim Saberinia; Ahmed H. Tewfik

Performance of N-tone sigma-delta modulators for UWB-OFDM

Kai Chuan Chang, Gerald E Sobelman, Ebrahim Saberinia, Ahmed H. Tewfik

Electrical and Computer Engineering

Research output: Contribution to journal › Conference article › peer-review

1 Scopus citations

Abstract

Due to the spectrum gap between subcarriers in a UWB-OFDM system, an N-tone sigma-delta modulator can be used to introduce appropriately placed nulls into the noise spectrum of such systems. The resulting performance is evaluated in terms of in-band quantization noise and excess resolution gained. Moreover, we relate the performance of our system to that of a traditional oversampled sigma-delta modulator operating in a lowpass system. A higher-order N-tone sigma-delta modulator having better noise shaping ability is also introduced for use in UWB-OFDM systems.

Original language	English (US)
Pages (from-to)	2483-2486
Number of pages	4
Journal	IEEE International Conference on Communications
Volume	4
State	Published - Aug 30 2004
Event	2004 IEEE International Conference on Communications - Paris, France Duration: Jun 20 2004 → Jun 24 2004

Keywords

Noise shaping
Sigma-delta
UWB-OFDM

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AU - Chang, Kai Chuan

AU - Sobelman, Gerald E

AU - Saberinia, Ebrahim

AU - Tewfik, Ahmed H.

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Y1 - 2004/8/30

N2 - Due to the spectrum gap between subcarriers in a UWB-OFDM system, an N-tone sigma-delta modulator can be used to introduce appropriately placed nulls into the noise spectrum of such systems. The resulting performance is evaluated in terms of in-band quantization noise and excess resolution gained. Moreover, we relate the performance of our system to that of a traditional oversampled sigma-delta modulator operating in a lowpass system. A higher-order N-tone sigma-delta modulator having better noise shaping ability is also introduced for use in UWB-OFDM systems.

AB - Due to the spectrum gap between subcarriers in a UWB-OFDM system, an N-tone sigma-delta modulator can be used to introduce appropriately placed nulls into the noise spectrum of such systems. The resulting performance is evaluated in terms of in-band quantization noise and excess resolution gained. Moreover, we relate the performance of our system to that of a traditional oversampled sigma-delta modulator operating in a lowpass system. A higher-order N-tone sigma-delta modulator having better noise shaping ability is also introduced for use in UWB-OFDM systems.

KW - Noise shaping

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KW - UWB-OFDM

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JO - IEEE International Conference on Communications

JF - IEEE International Conference on Communications

T2 - 2004 IEEE International Conference on Communications

Y2 - 20 June 2004 through 24 June 2004

ER -

Performance of N-tone sigma-delta modulators for UWB-OFDM

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Keywords

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