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The Zen of Python -- by Tim Peters Beautiful is better than ugly.Explicit is better than implicit.Simple is better than complex.Complex is better than 阅读全文
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Vector Quantization In scalar quantization each output of the discrete-time source is quantized separatelyand then encoded. For example, if we are usi 阅读全文
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Quantization In the previous section we studied two methods for noiseless coding; that is, compressionof the source output sequence such that full rec 阅读全文
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Measure of Information Noiseless Coding Noiseless coding is the general term for all schemes that reduce the number of bits requiredfor the representa 阅读全文
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Analog-to-Digital Conversion The majority of information sources are analog by nature. Analog sources includespeech, image, and many telemetry sources 阅读全文
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Angle Modulation Angle-modulation schemes, which include frequency modulation (FM) and phase modulation(PM), belong to the class of nonlinear modulati 阅读全文
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Conventional AM Demodulation The conventional AM is inferior to DSB-AM and SSB-AM whenpower and SNR are considered. The reason is that a usually large 阅读全文
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Conventional AM Demodulation The conventional AM is inferior to DSB-AM and SSB-AM whenpower and SNR are considered. The reason is that a usually large 阅读全文
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Demodulation of AM Signals Demodulation is the process of extracting the message signal from the modulated signal.The demodulation process depends on 阅读全文
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Demodulation of AM Signals Demodulation is the process of extracting the message signal from the modulated signal.The demodulation process depends on 阅读全文
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SSB-AM SSB-AM is derived from DSB-AM by eliminating one of the sidebands. Therefore,it occupies half the bandwidth of DSB-AM. Depending on the sideban 阅读全文