Characteristics of Radiation Noise from an LED Lamp and Its Effect on the BER Performance of an OFDM System for DTTB
Characteristics of Radiation Noise from an LED Lamp and Its Effect on the BER Performance of an OFDM System for DTTB
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DOI：
10.1109/temc.2013.2277596
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发表时间：
2014-02-01
影响因子：
2.1
通讯作者：
Matsumoto, Yasushi
中科院分区：
文献类型：
--
作者：
Wu, Ifong;Ohta, Hiroki;Matsumoto, Yasushi
研究了 LED 灯辐射噪声的特性及其对数字地面电视广播 (DTTB) 正交频分复用 (OFDM) 系统误码率 (BER) 性能的影响。测量 LED 灯辐射噪声的波形和频谱。观察到由 LED 开关电路引起的一系列噪声脉冲，这些噪声脉冲遍布日本的广播频段。使用以不同分辨率带宽测量的幅度概率分布 (APD) 来评估 LED 灯的辐射噪声及其对采用 64 正交幅度调制 (64QAM) 的 OFDM 系统 BER 性能的影响之间的关系。当分辨率带宽变窄时，噪声 APD 的行为与高斯噪声类似。受 LED 灯噪声影响的 OFDM 系统的 BER 性能是根据 APD 结果估计的，这与受 LED 噪声影响的测量结果非常吻合。顺序LED噪声的特性类似于高斯噪声对DTTB OFDM系统BER性能的影响。因此，APD 测量是估计 LED 灯噪声的特性和对 OFDM 系统影响的有用方法。
The characteristics of radiation noise from an LED lamp and its effect on the bit error rate (BER) performance of an orthogonal frequency-division multiplexing (OFDM) system for digital terrestrial television broadcasting (DTTB) are investigated. The waveform and frequency spectrum of radiation noise from an LED lamp are measured. A sequence of noise pulses is observed, caused by the switching circuit of the LED, and spread over the broadcast band of Japan. The relationship between the radiation noise from the LED lamp and its effect on the BER performance of the OFDM system using 64-quadrature amplitude modulation (64QAM) is evaluated using amplitude probability distribution (APD) measured with various resolution bandwidths. The behavior of the APD of the noise is similar to Gaussian noise when the resolution bandwidth becomes narrow. The BER performance of the OFDM system subjected to the noise of the LED lamp is estimated from the APD results, which agree well with measured results subjected to the LED noise. The characteristics of sequential LED noise are similar to the effect of Gaussian noise on the BER performance of the OFDM system for DTTB. Therefore, the APD measurement is a useful method to estimate the characteristics and effect of noise from an LED lamp on the OFDM system.