oqpsk 中文意思是什麼
oqpsk
解釋
交錯四相相移鍵控-
By theory and practice simulation, the several types of constant envelope modulation techniques are analyzed and compared, including theirs modulation principle, phase path, the modulated wave envelope, power spectrums, error bit rate and the influence of its power spectrums of the band - limited and non - linear, etc. especially we have researched the ijf - oqpsk modulation technique, and the performance of its inter - symbol interference and time jitter free, and its strongly resisting of spectral spreading
結合理論和實驗模擬結果，分析討論了衛星通信中的各種恆包絡調制技術，對它們的調制原理，相位路徑，已調波包絡，功率譜密度，誤碼性能，以及帶限非線性通道對其功率譜的影響等方面都作了研究和比較。特別研究了ijf ? oqpsk在消除碼間干擾和定時抖動方面的性能及其優良的旁瓣特性和抑制頻譜擴展特性。 -
Performance analysis of soft - decision decoding in demodulation of oqpsk signals
解調中實現對信號糾錯的分析與應用 -
From the research of ijf - oqpsk, we draw the conclusion that, compared with bpsk, qpsk and msk modems, in the band - limited and non - linear channel, it has nearly constant envelope, less spectral spreading, better pe performance and the less interference of the adjacent channel, et. so, it is more suitable for the satellite communication channel
通過對ijf ? oqpsk的分析研究可知，它相對于傳統的bpsk和qpsk調制方式，在帶限非線性通道下，具有包絡近似恆定，頻譜擴展小， eb no惡化小，對鄰道產生干擾弱等優點，因而它更適合於衛星通道。 -
We have designed a new type of ijf code to reduce the envelope fluctuation, and have also got the reduced envelope fluctuation ijf - oqpsk. it has faster roll off of the power spectrum and lower energy of band out
本文設計了一種能夠抑制包絡起伏型的ijf信號碼型，並相應地得到了抑制包絡起伏型的ijf ? oqpsk ，它具有更快的功率譜滾降特性和更好的相位路徑。 -
Ijf - oqpsk is actually to modulate the ijf codes by the offset quadrature phase shift keying
Ijf ? oqpsk實際上是對ijf信號再進行正交四相相移鍵控的調制技術。 -
On the basis of the third kind structure ( the modulator in simulative field ), the paper gave out a method to realize the software radio digital hardware modulator which can perform the function of ask, psk, dpsk, mask, qpsk, dqpsk, qam, oqpsk modulations, using the apparatus of dsp and cpld. the test showed that the modulator can meet the request of system design
並以第三種結構的數學模型（模擬域的正交調制模型）為基礎，以dsp和cpld器件為核心，進行了硬體電路設計，實現了基於軟擴頻系統的軟體無線電數字硬體調制平臺，實現了多種數字調制方式，其中包括ask ， psk ， dpsk ， mask ， qpsk ， dqpsk ， qam ， oqpsk調制方式。
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