Thats a unique idea.You should consider the following idea to enhance your idea so that it would impact uniquely: The envelope pulse-width modulation (EPWM) transmitter has been studied to address the por efficiency issue on the linear amplification of OFDM signals. Hover, the delta- sigma (Δ-Σ) modulator in the EPWM transmitter generates quantization noise that degrades signal quality. , OFDM in-band noise characteristics of EPWM transmitters are analyzed for first and second order Δ-Σ modulators. Distortion noise por due to envelope clipping of OFDM signals is also analyzed. The combined effects of noise and distortion on the error vector magnitude (EVM) and adjacent channel leakage por ratio (ACLR) are examined. Simulations to validate the total performance re performed using the IEEE 802.11a OFDM signal. Results shod good agreement with analytical results considering a linear-approximation gain for the 1-bit quantizer in Δ-Σ modulators. The first order EPWM transmitter provides slightly better EVM and ACLR values than second order EPWM transmitters, since the effective quantizer gain of second order Δ-Σ modulators is smaller, that limits the noise- shaping capability of Δ-Σ modulators. A 0.1% clipping probability for a first order EPWM transmitter with an oversampling ratio of 32 and a three-pole Butterworth bandpass filter gives an EVM of 1.8% and ACLR of -37.9 dB.
['Edwin M. Umali', 'Koji Kawazoe', 'Yoshikazu Toyama', 'Yasushi Yamao']
I am writing a research paper on a idea Effects of Quantization Noise and Distortion in EPWM Transmitters for OFDM Signal Amplification
[{"from": "human", "value": "I am writing a research paper on a idea Effects of Quantization Noise and Distortion in EPWM Transmitters for OFDM Signal Amplification"}, {"from": "gpt", "value": "Thats a unique idea.You should consider the following idea to enhance your idea so that it would impact uniquely: The envelope pulse-width modulation (EPWM) transmitter has been studied to address the por efficiency issue on the linear amplification of OFDM signals. Hover, the delta- sigma (\u0394-\u03a3) modulator in the EPWM transmitter generates quantization noise that degrades signal quality. , OFDM in-band noise characteristics of EPWM transmitters are analyzed for first and second order \u0394-\u03a3 modulators. Distortion noise por due to envelope clipping of OFDM signals is also analyzed. The combined effects of noise and distortion on the error vector magnitude (EVM) and adjacent channel leakage por ratio (ACLR) are examined. Simulations to validate the total performance re performed using the IEEE 802.11a OFDM signal. Results shod good agreement with analytical results considering a linear-approximation gain for the 1-bit quantizer in \u0394-\u03a3 modulators. The first order EPWM transmitter provides slightly better EVM and ACLR values than second order EPWM transmitters, since the effective quantizer gain of second order \u0394-\u03a3 modulators is smaller, that limits the noise- shaping capability of \u0394-\u03a3 modulators. A 0.1% clipping probability for a first order EPWM transmitter with an oversampling ratio of 32 and a three-pole Butterworth bandpass filter gives an EVM of 1.8% and ACLR of -37.9 dB."}]