nocturnal
发表于 2025-3-25 04:39:45
Igor Schagaev,Thomas Kaegi-TrachselThe problem of information transmission between two points is of fundamental relevance for communications. This problem occurs in radio broadcast, television transmission, telephony, satellite communication, and in many other instances in various systems.
子女
发表于 2025-3-25 08:38:06
Fault Tolerance: Theory and Concepts,It is well established nowadays that a frequency-modulated signal can not be accommodated in a bandwidth which is narrower than the one occupied by the original, or modulating, signal. Ironically, though, frequency modulation was originally conceived as a means to reduce the bandwidth required for the transmission of a given signal.
aggrieve
发表于 2025-3-25 12:24:13
http://reply.papertrans.cn/24/2305/230414/230414_23.png
LUCY
发表于 2025-3-25 17:51:37
http://reply.papertrans.cn/24/2305/230414/230414_24.png
Arctic
发表于 2025-3-25 23:34:53
http://reply.papertrans.cn/24/2305/230414/230414_25.png
陈腐的人
发表于 2025-3-26 00:57:05
Amplitude Modulation,The problem of information transmission between two points is of fundamental relevance for communications. This problem occurs in radio broadcast, television transmission, telephony, satellite communication, and in many other instances in various systems.
Introduction
发表于 2025-3-26 04:34:52
Angle Modulation,It is well established nowadays that a frequency-modulated signal can not be accommodated in a bandwidth which is narrower than the one occupied by the original, or modulating, signal. Ironically, though, frequency modulation was originally conceived as a means to reduce the bandwidth required for the transmission of a given signal.
antiandrogen
发表于 2025-3-26 10:33:57
http://reply.papertrans.cn/24/2305/230414/230414_28.png
Seizure
发表于 2025-3-26 16:16:34
Carrier Transmission,In classic frequency division multiplexing (FDM), now revived with the emergence of orthogonal frequency division multiplexing (OFDM), the signals are modulated in single sideband (SSB) and allocated in sets of twelve channels to form a group (Alencar .).
野蛮
发表于 2025-3-26 18:55:22
Mobile Cellular Telephony,Amobile telephone system is defined as a communication network via radio which allows continuous mobility by dividing its coverage area into cells. Wireless communications, on the other hand, imply radio communications without necessarily requiring handover from one cell to another during an ongoing call (Nanda and Goodman .).