frequency-modulation transmitter 中文意思是什麼
frequency-modulation transmitter
解釋
調頻發射機- frequency : n. 1. 屢次，頻仍，頻繁。2. （脈搏等的）次數，出現率；頻度；【物理學】頻率，周率。
- modulation : n 調整，調節；（聲調的）抑揚，變化；【音樂】轉調，變調；【無線電】調制。 amplitude modulation 振...
- transmitter : n 傳送者；傳達者；寄交者；傳導物；遺傳者；【無線電】發送機；發射機；發報機；送話機，話筒；【火箭...
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Transmitter, receiver and ground communication equipment used in domestic satellite communication earth stations - technical requirements - part 3 : equipment for television frequency modulation
國內衛星通信地球站發射接收和地面通信設備技術要求第3部分:電視調頻設備 -
Our object is an intermediate frequency modem of a software defined radio transmitter - receiver of multi - service, multi - modulationmode and multi - processdatarate. first, related software defined radio theory is introduced ; later, channels of transmitter - receiver are designed with consideration of data format, modulation, fec, interwaving. and scrambling ; emphasis is placed on theory and implementation of an audio compression algorithm cvsd ( continuous variable slope delta modulation ) and a fec technique convolutional coding - decoding
本文首先介紹了相關的軟體無線電理論；然後完成了包括數據格式，調制方式，糾錯碼方式，交織器和擾碼器等部分的中頻數據機通道設計；接著著重介紹了系統中使用的音頻壓縮演算法cvsd （連續可變斜率增量調制）的原理和實現，以及作為前向糾錯碼的卷積碼編碼理論和編解碼的高效實現。 -
The transmitter adopt qam modulation mode, which is a directly modulation upper frequency conversion mode, which could afford more high bit rate transmission in the same bandwidth compared to other modulation mode
發射機採用數字式調制方式，即qam直接調制上變頻方式，相對于其它調制方式可以實現在相同帶寬下的高碼率傳輸。 -
In this paper, the author comprehensively expatiates the research on microwave phase in - lock frequency modulation. at first, the background of reentry telemetry system and the features of pcm telemetry system are presented, and then the author mainly discusses the application of phase in - lock fm techniques in the design of pcm transmitter and the analysis of characteristics of binary pcm reentry telemetry channel
在文章的前面，作者簡單介紹了目前再入遙測技術發展現狀和pcm系統的特點；然後給出了二元pcm再入遙測通道的系統分析和高碼速率數據傳輸實現的主要途徑；在文章的第三部分，討論了鎖相調頻技術及其在pcm遙測發射機中的實際應用。
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