Budget
发表于 2025-3-23 10:53:45
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GRIN
发表于 2025-3-23 15:59:08
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Gullible
发表于 2025-3-23 21:24:04
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Consequence
发表于 2025-3-24 02:02:54
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progestogen
发表于 2025-3-24 03:37:54
Multicarrier, bandwidth and voice-only transmission. GSM (2G) which was the first digital system allowed for voice and SMS to be sent. Both these standards, AMPS and GSM, used Frequency Division Multiple Access; i.e., users were differentiated based on the carrier frequency.
轻浮思想
发表于 2025-3-24 08:39:57
Shannon Capacity,whatever the source of information, a human voice, a piece of music, or a text document, must first be converted into bits for efficient transmission over the medium. He along with John Tukey is credited with coining the term “bit” which is now the most commonly used term in communication theory.
裁决
发表于 2025-3-24 12:07:03
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BROTH
发表于 2025-3-24 14:51:00
Phase and Frequency,timator, FFT, MUSIC, and ESPRIT. The first two methods are quite accurate and easy to implement, but they work only for a single sinusoid embedded in noise. We have to use FFT, MUSIC, or ESPRIT for more complex scenarios.
BLAND
发表于 2025-3-24 21:28:57
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Phagocytes
发表于 2025-3-25 03:04:11
Modulation and Coding,al communication systems. These two together allow for high-speed, error-free transmission over a wireless channel which is prone to noise, fading, and interference. A strong code allows us to work at a low signal to noise ratio (SNR), and a higher-order modulation ensures that more bits are packed