酸民哥 asked in 社會與文化語言 · 1 decade ago

”通訊網路”方面的”英文”翻譯問題???(求救sos~)

有沒有英文好的大大能幫我看看我的翻譯@@?

我翻的真的很心虛~~~~~~ ><

尤其是二三段,拜託指點指點一下晚輩~~~

第一段:

HIERARCHICAL ACCESS MODEL

This model adopts a hierarchical access structure with primary and secondary users.

The basic idea is to open licensed spectrum to secondary users while limiting the interference perceived by primary users (licensees).

Two approaches to spectrum sharing between primary and secondary users have been considered: Spectrum underlay and spectrum overlay.

分級存取模型

這個模型在主要和次要用戶上採用一個等級存取制度結構,

基本想法是要開放頻譜許可給被主要用戶感知干擾的限制

考慮主要用戶和次要用戶間

提出了兩種頻譜分享的方法:底襯式頻譜 疊蓋式頻譜

第二段:

The underlay approach imposes severe constraints on the transmission

power of secondary users so that they operate below the noise floor of primary users.

By spreading transmitted signals over a wide frequency band (UWB),

secondary users can potentially achieve short-range high data rate with extremely low transmission power.

Based on a worst-case assumption that primary users transmit all the time, this approach does not rely on detection and exploitation of spectrum white space.

襯底方法是強制增加次要用戶的傳輸能力以便他們可以在主要用戶的雜訊地平上得以操作,

在超寬頻頻帶(UWB)上傳輸訊號,次要用戶就能以極低的傳輸功率來做短程、高資料傳輸速率的傳輸。在超寬頻頻帶上傳輸是就不用依賴偵查頻譜空餘時間

第三段:

Spectrum overlay was first envisioned by Mitola under the term spectrum pooling and then investigated by the DARPA Next Generation (XG) program under the term opportunistic spectrum access. Differing from spectrum underlay,

this approach does not necessarily impose severe restrictions on the

transmission power of secondary users, but rather on when and where

they may transmit.

It directly targets at spatial and temporal spectrum white space by allowing secondary users to identify and exploit local and instantaneous spectrum availability in a non-intrusive manner.

疊蓋式頻譜的想法是由研究員Mitola 在美國國防部高級研究計劃局(DARPA) 研究頻譜機會存取下一代的計劃中有了初次展望,

不同於底襯式頻譜,這種方法不一定強迫限制次要用戶一定要增加它的傳輸能力,但寧可在它們可能會傳送的時間或地點,

允許次要用戶在一個非侵入式的方法中直接在目標的空間性和時間性頻譜空餘時間可 辦認和利用局部的和短暫的可用頻譜

1 Answer

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  • 1 decade ago
    Favorite Answer

    你大部分都有抓到意思,我只是稍微潤飾你的翻譯而已,希望我薄弱的電子學常識可以讓句子看起來比較通順易懂。

    HIERARCHICAL ACCESS MODEL

    This model adopts a hierarchical access structure with primary and secondary users. The basic idea is to open licensed spectrum to secondary users while limiting the interference perceived by primary users (licensees). Two approaches to spectrum sharing between primary and secondary users have been considered: Spectrum underlay and spectrum overlay.

    分級存取模型

    此模型在主要與次要用戶間採取一項分級存取結構,基本的觀念是當主要用戶(取得執照用戶)感知到干擾時,開放頻譜許可給予次要用戶。在主要與次要用戶間的頻譜分享要考慮兩項措施(方法):底襯式頻譜 疊蓋式頻譜

    The underlay approach imposes severe constraints on the transmission

    power of secondary users so that they operate below the noise floor of primary users.

    By spreading transmitted signals over a wide frequency band (UWB),

    secondary users can potentially achieve short-range high data rate with extremely low transmission power.

    Based on a worst-case assumption that primary users transmit all the time, this approach does not rely on detection and exploitation of spectrum white space.

    基本辦法是再次要用戶的傳訊能量上強制加以嚴格的限制,以使他們在主要用戶的雜訊地平標準下進行操作。靠著在超寬頻頻帶(UWB)上傳輸訊號,次要用戶能以極低的傳輸功率來做短程、高資料傳輸速率的傳輸。最壞的情況是主要用戶運作全天候的傳輸,則這方法仍可以能夠不倚賴偵測與開發頻譜空白區域來進行

    Spectrum overlay was first envisioned by Mitola under the term spectrum pooling and then investigated by the DARPA Next Generation (XG) program under the term opportunistic spectrum access. Differing from spectrum underlay,

    this approach does not necessarily impose severe restrictions on the

    transmission power of secondary users, but rather on when and where

    they may transmit. It directly targets at spatial and temporal spectrum white space by allowing secondary users to identify and exploit local and instantaneous spectrum availability in a non-intrusive manner.

    疊蓋式頻譜的想法是由研究員Mitola 在美國國防部高級研究計劃局(DARPA) 研究頻譜機會存取下一代的計劃中有了初次展望,

    不同於底襯式頻譜,這種方法不一定強迫限制次要用戶一定要增加它的傳輸能力,但是會限制可能傳送的時或地。由於讓次要用戶得以去辨識開發局部與短暫的可用頻譜,這項方法直接鎖定在時間與空間頻譜中的的空白區域。

    Source(s): Myself
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