調(diào)制解調(diào)技術(shù)中英文翻譯資料-文庫(kù)吧
2024-12-23 01:37 本頁(yè)面
【正文】 seshift keying (PSK) and so on. At present has used in the mobile munication system the modulating technology modulating technique being possible to divide into two big kinds: The linear modulation technology and the permanent enveloping modulating technology modulating technique linear modulation technology mainly has: PSKBPSK、 QPSK OQPSK/4 – QPSK、 QAM、 16QAM、 64QAM、 256QAM .the permanent envelope modulating technology modulating technique mainly has: MSK TFM GMSK. The article in view of the three kind of basicial modulation demodulation technology has carried on the detailed simulation and the analysis, obviously, chooses one kind of modulating technology modulating technique is determined according to the channel characteristic and the power efficiency and the frequency spectrum efficiency cannot be satisfactory to both sides generally uneven high frequency spectrum efficiency needs to sacrifice certain power efficiency to obtain。 Similarly, the high power efficiency also needs to sacrifice certain frequency spectrum with the modulation technique in the unceasing development, the new modulating technology modulating technique might bring the better frequency spectrum efficiency and the higher power efficiency. FSK and PSK in the numeral mobile munication the find application
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