查詢結果分析
來源資料
相關文獻
- On the User Capacity of Frequency-Hop Spread Spectrum Systems
- A New Protocol for Cellular Mobile Communications--Non-Collision Packet Reservation Multiple Access
- VHF跳頻無線電機性能之探討
- 無線區域網路卡之設計
- CDMA無線通訊領域角色吃重
- 跳頻技術--高成本效益的無線區域網路LAN解決方案
- IMT-2000衛星通信發展趨勢分析
- Capacity Analysis of the Orthogonal BFSK FH-CDMA System with RTT Side Information in Rayleigh Channel
- 多用戶檢知的擾動原理
- DECT系統的同步與功率管理
頁籤選單縮合
題 名 | On the User Capacity of Frequency-Hop Spread Spectrum Systems=跳頻式展頻系統之使用者容量 |
---|---|
作 者 | 王居尉; | 書刊名 | 建國學報 |
卷 期 | 20 2001.06[民90.06] |
頁 次 | 頁333-343 |
分類號 | 448.53 |
關鍵詞 | 跳頻; M維度頻率位移鍵送; 通道狀態資訊; 使用者容量; 多重接取; Frequency-hop; FH; M-ary frequency shift key; MFSK; Channel side information; CSI; User capacity; Multiple access; |
語 文 | 英文(English) |
中文摘要 | 此篇論文探討使用M維度頻率位移鍵送之跳頻式展頻系統,在文獻上,針對這種系統的研究結果大部份是基於通道狀態資訊可用的假設,此通道狀態資訊是指有關在通道的傳送是否遭遇到其他使用者所傳送訊號的碰撞。在此篇論文裡,我們主要探討當欠缺通道狀態資訊情況時的兩種不同通道模型的使用者容量,其中一種是缺乏對傳送字符頻率強度的認知,另一種則具有此種認知。研究的結果顯示雖然在極高負載的情況下,我們提議的系統有較佳的性能,但在合理的負載情況下,基於有通道狀態資訊可用的系統有較佳的性能。然而,通道狀態資訊的取得需使用到額外的系統頻寬,因而可移除對通道狀態資訊的依賴便是我們所提議系統的主要優勢。 |
英文摘要 | This paper deals with the frequency-hop (FH) spread spectrum system using M-ary frequency shift keying (MFSK) modulation scheme. For this kind of system, in the open literature, most of the results have been based on the assumption that the channel side information (CSI) about whether a hop was hit or not is available. In this paper we evaluate the user capacity when the CSI is not available for two distinct channel models. One is the channel without intensity knowledge to the frequencies used to transmit symbols, and the other is the channel with intensity knowledge. Results show that, although better in high load conditions, both the models perform worst than the case with CSI in reasonable load conditions. However, the CSI definitely requires additional bandwidth to obtain; thus, our approaches may earn their superiority due to removing the dependence on the CSI. |
本系統中英文摘要資訊取自各篇刊載內容。