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N'isiokwu a, m ga-ekwu maka nkwurịta okwu System Model na nkọwa gụnyere 5 akụkụ ha, (1) Source codeing na decoding, (2) Encoding na decoding nke ọwa, (3) Encryption na decryption, (4) Digital modulation na demodulation, (5) Mmekọrịta. Ka anyi mikpuo miri̷...

1. Nhazi azụmahịa nkwurịta okwu Dị ka ụdị ọrụ nkwurịta okwu dị iche iche si dị, enwere ike kewaa usoro nkwurịta okwu na usoro nkwurịta okwu telegraph, usoro nkwurịta okwu ekwentị, usoro nkwurịta okwu data, na usoro nkwurịta okwu oyiyi. N'ihi na kọntaktị ekwentị ...

Enwere ike iweta ma mgbaama na mkpọtụ na nzikọrịta ozi dị ka usoro enweghị usoro na-adịgasị iche na oge. Usoro random nwere njirimara nke mgbanwe na-enweghị usoro na ọrụ oge, a pụkwara ịkọwa ya site n'echiche abụọ dị iche iche ma nwee njikọ chiri anya: ① ​​usoro random bụ nchịkọta nke na ...

Usoro nzikọrịta ozi bụ ụzọ ndị mmadụ abụọ na-ekwurịta okwu si arụkọ ọrụ ọnụ ma ọ bụ zipu ozi. 1. Simplex, ọkara-duplex na zuru-duplex nkwurịta okwu Maka nkwurịta okwu n'ókè-na-point, dị ka ntụziaka na oge mmekọrịta nke nnyefe ozi, nkwurịta okwu mode c ...

N'ime usoro nkwurịta okwu dijitalụ, onye nnata na-enweta nchikota nke mgbaàmà na-ebufe na mkpọtụ ọwa. Nnabata kacha mma nke akara dijitalụ dabere na njiri “kachasị mma” yana enwere ike mperi mperi. Njehie ndị a tụlere n'isiakwụkwọ a bụ ọkachasị n'ihi oke band...

Fig 6-6 bụ ihe nkpuchi nke usoro mgbasa ozi baseband dijitalụ. Ihe mejupụtara ya bụ ihe nzacha nnyefe (ọwa ọkụ ọkụ ọkụ), ọwa, nzacha nnabata, na onye na-ekpebi ihe nlele. Iji hụ na a pụrụ ịdabere na ya na n'usoro ọrụ o ...